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Thread: SALE: JM-PhD-D1 PWM Hotwire Regulator

  1. #1
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    Default SOLD OUT: JM-PhD-D1 PWM Hotwire Regulator

    I’d like to announce the sale of the JM-PhD-D1. SOLD OUT. Do not place more orders.
    Major Update! Multi-level operation is now available.




    This has been built based on theory, development, and prototyping work done by AlanB, wquilles, myself, and others over the last several months.
    Design links:
    Part1
    Part2
    Part3

    Feeler threads
    Part1
    Part2

    Major Update! Multi-level operation is now available.
    It's a lot of information, but please read through it, it will answer most of you questions.
    The Basics...
    What it is: The JM-PhD-D1 is a voltage regulator for hotwire flashlights that uses an Atmel Tiny84 microprocessor to measure battery voltage and adjust the output using 12-bit PWM to maintain constant RMS voltage to the bulb.

    Where it goes: It’s designed to fit under the aluminum base of a KIU socket for a D cell Mag body. With its current software version, you make adjustments via 2 onboard pots, so drilling 2 holes in your KIU base will make things a lot easier for adjustments after it is installed. See below for drilling a template and installation documents..

    How it works: It uses PWM (Pulse Width Modulation) to control the RMS voltage to the bulb. By turning a switch (an FET) on and off several times (244Hz) a second, the "effective" voltage that the bulb sees can be controlled. The bulb is still receiving the full battery pack voltage while the switch is on, but it’s not on for the whole time. The frequency of the PWM and thermal mass of the filament prevent flicker. It can only control output voltage less than or equal to the pack voltage. It cannot boost battery voltage.

    Can it be used with LEDs? Since the full battery voltage is applied to the output while the FET is on, it could only be used with LEDs if the full battery voltage could be applied to the LED without damage. Also, since LEDs turn on and off faster than a filament, you will probably notice flicker. So it is my recommendation that this not be used with LEDs.

    What functions / features exist? I have tried to future proof the hardware design as much as possible. There are 2 11-turn pots onboard for adjustment. I’ve used 11-turn pots to allow very fine adjustment. There are also 3 additional pads that connect to unused pins on the Tiny84 to allow the future use of pushbuttons or LEDs for things like mode selection, voltage level selection or adjustment, low battery indication, rotary encoder, etc, etc, etc. There is a 6-pin programming header onboard to allow for software updates. The programming header is female to avoid shorts, so a male-male adapter is required to connect it to the programmer. I have a bunch of them and will include one with each order until I run out.

    Current Software Functions:
    Standard Mode:

    This mode is designed to have power to the "control power" connection switched on or off by the existing Mag switch (See wiring diagrams). When turned on, the regulator will softstart to the set voltage. The 2 pots onboard are used to adjust output voltage and low voltage set point.

    Pot 1 (Vbulb): Adjusts desired output voltage between 0 and 40V. (Clockwise increases) If you set the output to a voltage above the battery voltage, the FET will be turned on 100% of the time and you will only be able to get the pack voltage.
    Pot 2 (Vlow): Adjusts low voltage set point. (Clockwise increases) When the low voltage set point is reached (by falling pack voltage) and maintained for 0.125 to 0.5 seconds (configurable by the user), the output will be reduced and ramped up and down between 2 lower percentages of the set output voltage. It will pulse. If the batteries recover, the regulator will ramp voltage back up to the set point.
    Low voltage actions: The user can select how the regulator should behave once in Low Voltage Mode. The light can pulse OR dim.
    Low Voltage shutdowm options: The light, once in low voltage mode, can either shut down after a selected period of time, or can shutdown once the battery voltage has fallen to a user selected percentage of the Low Voltage warning point. or BOTH which ever comes first.
    Over temperature warning: At a user selected temperature (50, 60, 70, 80C), the light will dim to 35% of it's set voltage.
    Over temperature shutdown: If selected by the user, the light can shut itself down if in Over temperature mode for a period of seconds selected by the user.
    S-Curve softstart ramp: This function is not an option, it's more of a feature. It starts the bulb slowly at first, then ramps quickly to a point less than the regulated voltage then ramps slowly to the target voltage. It's designed to improve bulb care and hopefully blow up fewer bulbs.
    Soft Start speed: 3 speeds are available. Slow, Medium, or Fast.
    ..Slow is best for users that are pushing the bulb very close to its flash point. It's a gentle start.
    ..Medium is a good multi-purpose start.
    ..Fast is very fast. The bulb comes on almost instantly.
    When the light shuts down due to over temperature or low voltage it's not completely shutdown. It's actually asleep and will consume 0.1mA of current.

    Multi-Level Mode:
    This mode is designed to have battery voltage connected all the time to the "control power" connection (See wiring diagrams).
    The existing Mag switch will need to be modified for Momentary operation. The Mag switch will then need to be connected from the A2 pad on the board to the Battery Negative ( B- ) connection. (See wiring diagrams).
    The Mag switch will now control multiple levels of output selected by the user.
    These levels are percentages of the voltage set using the Vbulb Pot. So, for example, Level-1 can be 87% of Vbulb, Level-2 can be 94% of Vbulb, and Level-3 can be 100%.
    From the Off condition, 1 click will turn the light on to Level-1. Another click will advance the light to Level-2, another click will advance the light to Level-3, another click will return the light to level-1. click & hold the button for 1 second and the light will shut off.
    The click&hold can be done at any time. From off, 2 quick clicks goes to Level-2. 3 quick clicks goes to level-3.
    The voltage percentages for the different levels are selected by the user (either when ordering, or by re-programming it later). They can be in any order you want. You can have a light that sequences through low, med, high or high, medium, low. The regulator can also be set up for just 2 levels or just 1 level if you want.

    Pot 1 (Vbulb): Adjusts Maximum output voltage between 0 and 40V. (Clockwise increases) If you set the output to a voltage above the battery voltage, the FET will be turned on 100% of the time and you will only be able to get the pack voltage.
    Pot 2 (Vlow): Adjusts low voltage set point. (Clockwise increases) When the low voltage set point is reached (by falling pack voltage) and maintained for 0.125 to 0.5 seconds (configurable by the user), the output will be reduced and ramped up and down between 2 lower percentages of the set output voltage. It will pulse. If the batteries recover, the regulator will ramp voltage back up to the set point.
    Output level percentages: The user can select (while ordering or re-programming) what percentage of Vbulb each level can be.
    Soft Ramping: This option enables the regulator to ramp softly to the next level
    Low voltage actions: The user can select how the regulator should behave once in Low Voltage Mode. The light can pulse OR dim.
    Low Voltage shutdowm options: The light, once in low voltage mode, can either shut down after a selected period of time, or can shutdown once the battery voltage has fallen to a user selected percentage of the Low Voltage warning point. or BOTH which ever comes first.
    Over temperature warning: At a user selected temperature (50, 60, 70, 80C), the light will dim to 35% of it's set voltage.
    Over temperature shutdown: If selected by the user, the light can shut itself down if in Over temperature mode for a period of seconds selected by the user.
    S-Curve softstart ramp: This function is not an option, it's more of a feature. It starts the bulb slowly at first, then ramps quickly to a point less than the regulated voltage then ramps slowly to the target voltage. It's designed to improve bulb care and hopefully blow up fewer bulbs.
    Soft Start speed: 3 speeds are available. Slow, Medium, or Fast.
    ..Slow is best for users that are pushing the bulb very close to its flash point. It's a gentle start.
    ..Medium is a good multi-purpose start.
    ..Fast is very fast. The bulb comes on almost instantly.
    When the light is shutdown by the user or due to over temperature or low voltage it's not completely shutdown. It's actually asleep and will consume 0.1mA of current.


    Setting the voltage: Any voltage setting must be done with a bulb or other load in place in the socket. A 5W 1K Ohm resistor will work in place of a bulb. A True RMS reading DMM is best (Like the Fluke 189), but it can be done with an average reading DMM using the following calculation.
    You need to now the following:
    Vin = Battery voltage under load
    Vrms = Your desired RMS voltage (The effective voltage to the bulb)

    Vavg=(Vrms^2)/Vin

    Once you’ve calculated Vavg, turn the voltage adjust pot until your meter reads the Vavg voltage you just calculated.

    Setting the low voltage point is a little trickier. First turn the Vlow adjustment pot counter-clockwise several turns. You need to let the batteries drain to the voltage you want them to shut off, then turn the pot clockwise until the light begins to pulse. Then adjust slowly around the point where the pulsing began to fine tune the adjustment.

    I will make the initial adjustment per the buyer’s specification.

    Any adjustments for voltage can be done with the 2 onboard pots. You do NOT need a computer & programmer to make settings changes. The programming header on the board is for future software updates and for those of you who want to do customizations to the software. All you need with the current software revision is a very tiny screwdriver. Adjustments can be made with the light on. If adjusting the pots while the regulator is installed, NO special precautions need to be taken to avoid touching the aluminum base with adjustment screwdriver.

    High temperature indication: When/If the microprocessor reaches a user selcted temperature (50,60,70,80 deg C), the voltage will be ramped down to 35% of the set output and will remain there until power cycled.

    Specifications:
    10/12-bit regulation: Gives 0.04V resolution while setting the regulator, but is extremely accurate at holding that voltage. Typically better than 0.03V
    Minimum voltage: 5.2V
    Maximum voltage: 40V
    Maximum continuous current: 13A (Lux Luthor has performed testing up to 15 Amps without high temperature shutdown)
    Adjustable output range: 0V to battery pack voltage.
    Leakage current:
    ..Using the "Standard Mode": When OFF, the driver will leak ~1 uA of current.
    ..Using the "Multi-Level Mode": When "OFF", the regulator is sleeping and uses 0.1 mA of current.

    Testing done so far:
    64625 @ 13V with 17V input creates very little heat in the FET.
    64447 @ 18V with 39.9V input creates almost no temperature increase in the FET at all.
    This unit will not handle the 600+ watt lantern style lights.

    OK. Now the bottom line.
    Each unit is $40 USD and shipping within the US is by US Priority Mail ($7 per order, up to 10 units). International shipping is on a per order basis and will have to be figured out at shipping time. Each order will include one male-male programming adapter. First Class Mail International is generally within the $7 shipping charge.
    -------Ordering Option---------
    For "Standard Mode" (Default Values are Bold)
    Operation Mode: Standard
    Vbulb: Your desired Vbulb voltage
    Vlow: The voltage where the low voltage warning should kick in.
    Softstart: Slow, Med, Fast
    Low Volt Warning: Pulsing or Dimming
    Low volt shutdown: Timed:# seconds, Undervolt: X%, or Both (Both, 30 Seconds, 94%)
    Over Temp trigger: 50C, 60C, 70C, or 80C
    Over Temp Shutdown: Yes/No, If, Yes, Y seconds: (30 Seconds)
    Response: 1/8, 1/4, 1/2 second

    For "Multi-Level Mode"
    Operation Mode: Multi-Level (Default Values are Bold)
    Vbulb: Your desired Vbulb voltage
    Vlow: The voltage where the low voltage warning should kick in.
    Level-1: 18-100% (87%)
    Level-2: 18-100% (94%)
    Level-3: 18-100% (100%)
    SoftRamp: Yes/No
    Softstart: Slow, Med, Fast
    Low Volt Warning: Pulsing or Dimming
    Low volt shutdown: Timed:# seconds, Undervolt: X%, or Both (Both, 30 Seconds, 94%)
    Over Temp trigger: 50C, 60C, 70C, or 80C
    Over Temp Shutdown: Yes/No, If, Yes, Y seconds: (30 Seconds)
    Response: 1/8, 1/4, 1/2 second

    -------------------

    Example order will list the number of units, the set voltage, low voltage point, and options.
    Also include the shipping method if it differs from US Priority mail. International orders can be shipped by First Class Mail International and is also covered by the standard $7 shipping.
    Please copy and paste the text of your CPF "I’ll take it" post into your PayPal payment along with your CPF handle. You NEED to include your CPF handle.
    Send PayPal to:
    --------
    I’ll take:
    3 drivers
    #1
    Operation Mode: Standard
    Vbulb: 7.2V
    Vlow: 6.6V
    Softstart: Med
    Low Volt Warning: Pulsing
    Low volt shutdown: Both. Timed:30 seconds, Undervolt: 87%
    Over Temp trigger: 60C
    Over Temp Shutdown: Yes, 10 seconds:
    Response: 1/8 second

    #2
    Operation Mode: Standard
    Vbulb: 13.4V
    Vlow: 12.0V
    Softstart: Slow
    Low Volt Warning: Pulsing
    Low volt shutdown: Both. Timed:30 seconds, Undervolt: 87%
    Over Temp trigger: 70C
    Over Temp Shutdown: Yes, 10 seconds:
    Response: 1/8 second

    #2
    Operation Mode: Multi-Level
    Vbulb: 13.4V
    Vlow: 12.0V
    Level-1: 80%
    Level-2: 92%
    Level-3: 100%
    SoftRamp: Yes
    Softstart: Slow
    Low Volt Warning: Pulsing
    Low volt shutdown: Both. Timed:30 seconds, Undervolt: 92%
    Over Temp trigger: 70C
    Over Temp Shutdown: Yes, 10 seconds:
    Response: 1/8 second

    Total: $127
    ---------
    My first batch is 100 units. I’m planning on a second batch if the demand in great enough.

    Wiring diagram for "Standard Mode" installation..


    Wiring diagram for "Multi-Level Mode" installation.


    All support documents and code can be found below.
    ---------------------------------------
    How to Load Firmware on your PhD-D1: Link

    Firmware:
    Rev3f: Link
    Rev3h: Link

    Connection Diagrams:
    Powering your D1 externally if programming when not installed: Link
    Standard installation: Link
    Multi-Level UI: Link

    Assembly Instructions:
    Drill Template: Link
    Standard installation:Link
    Multi-Level UI installation:Link
    ------------------------------------------------------------


    All options/features are available in the Rev3 code. Any one that wants to tweak their setting by re-programming the light themselves should download the most recent source code.

    Detailed programming instructions.

    An instructional document for the "Standard Mode" installation.
    An instructional document for the "Multi-Level" installation.

    A drill template for the KIU socket can also be found in the support site. You print the PDF at 100% size. Cut out the round regulator board outline. Then place the cut out paper inside the bottom of the KIU socket so the printing is visible. Line up the screw holes of the KIU with the screw hole markings on the paper and use a sharp object to mark the centers of the holes to drill to allow pot adjustments without removing the switch from the body.
    Last edited by JimmyM; 09-25-2014 at 08:48 AM.

  2. #2
    Flashaholic* Alan B's Avatar
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    Default Re: SALE: JM-PhD-D1 PWM Hotwire Regulator

    Congratulations, Jim!

    I'll take the first one!!!
    8 nimh AA so min voltage 0.9 ea or 7.2V
    wa1185 10.8 volts regulated
    $40 + $7 ship.

    Last edited by Alan B; 05-13-2009 at 09:18 AM.

  3. #3
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    Default Re: SALE: JM-PhD-D1 PWM Hotwire Regulator

    Thanks, Alan.

  4. #4
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    Default Re: SALE: JM-PhD-D1 PWM Hotwire Regulator

    Hi neighbor,

    Beautiful work. I'm definitely getting one. I will get another one if it can handle 12 Li-Ion cells (~51V). What's the max input voltage?

    Thanks.

  5. #5
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    Default Re: SALE: JM-PhD-D1 PWM Hotwire Regulator

    Sweet

    Nice one Jimmy.

    I will take Two ( for Now )

    #1 Set voltage ? V, low volt: ?V
    #2 Set voltage ? V, low volt: ?V

    Sorry to be difficult, but at the moment I dont know. But I'm Glad I didn't sell my Fluke 189.

    Couple of questions...
    How long is the soft start?
    Do you still get a soft start if the FET is at 100%?
    If the Temp is 70 deg C, and it goes to 25% set O/P...if you turn on and off quickly does the temp feature still kick in when/if the circuit is > 70 Deg C? ( I'm assuming you chose 70 degrees, as the socket may be this hot so the cells ( Li-ion etc,) will still be at 60 deg. or below?
    Is the 70 degrees set in stone...or could it be changed in the future. (future hardware/ connection/ software dependant?) or is 70 deg the max heat you would want on the circuit

    I will PM later with shipping requirements to the UK, and Voltage settings.

    Congratulations...This is Cool!!!!
    Last edited by Raoul_Duke; 05-13-2009 at 09:33 AM.

  6. #6
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    Default Re: SALE: JM-PhD-D1 PWM Hotwire Regulator

    Quote Originally Posted by niner View Post
    Hi neighbor,

    Beautiful work. I'm definitely getting one. I will get another one if it can handle 12 Li-Ion cells (~51V). What's the max input voltage?

    Thanks.
    40V. Sorry Dude. I'll see if I can a different onboard regulator for a possible future mod/version.

  7. #7
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    Default Re: SALE: JM-PhD-D1 PWM Hotwire Regulator

    Quote Originally Posted by Raoul_Duke View Post
    Sweet

    Nice one Jimmy.

    I will take Two ( for Now )

    #1 Set voltage ? V, low volt: ?V
    #2 Set voltage ? V, low volt: ?V

    Sorry to be difficult, but at the moment I dont know. But I'm Glad I didn't sell my Fluke 189.
    Congratulations...This is Cool!!!!
    How long is the soft start? About 250mS, but can be changed in software.
    Do you still get a soft start if the FET is at 100%? Yes
    If the Temp is 70 deg C, and it goes to 25% set O/P...if you turn on and off quickly does the temp feature still kick in when/if the circuit is > 70 Deg C? It will try to ramp up, but if it's still over 70C after 0.5 seconds, it will drop back to 25%.
    ( I'm assuming you chose 70 degrees, as the socket may be this hot so the cells ( Li-ion etc,) will still be at 60 deg. or below? 70 was a compromise between 60 and the maximum rated for the controller.
    Is the 70 degrees set in stone...or could it be changed in the future. (future hardware/ connection/ software dependant?) or is 70 deg the max heat you would want on the circuit. 70 is the max I'd like to see, but it is reconfigurable in software

  8. #8
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    Default Re: SALE: JM-PhD-D1 PWM Hotwire Regulator

    Quote Originally Posted by JimmyM View Post
    40V. Sorry Dude. I'll see if I can a different onboard regulator for a possible future mod/version.
    Jim, I'll take two anyway.

    #1 set volt:17.5V, low volt: 12V
    #2 set volt:29V, low volt: 24V

    Total: $87.

    Thanks!

  9. #9

    Default Re: SALE: JM-PhD-D1 PWM Hotwire Regulator

    Is there a tutorial with pix that would help with assembly into the Mag switch? Thanks

  10. #10
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    Default Re: SALE: JM-PhD-D1 PWM Hotwire Regulator

    Quote Originally Posted by chuck614 View Post
    Is there a tutorial with pix that would help with assembly into the Mag switch? Thanks
    I have a wiring diagram that I'm going to try to post again. I'll see if I can put together a tutorial for the assembly. Until then it's essentially the same as assembling the JM-SST or AWR HorDriver.

    I CANNOT get ImageShack to upload a picture. Where do you folks host your pictures?
    Last edited by JimmyM; 05-13-2009 at 01:23 PM.

  11. #11

    Default Re: SALE: JM-PhD-D1 PWM Hotwire Regulator

    I want two-- I'll figure out the voltages tonight.

  12. #12
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    Default Re: SALE: JM-PhD-D1 PWM Hotwire Regulator

    Quote Originally Posted by JimmyM View Post
    Where do you folks host your pictures?
    photobucket.com

  13. #13
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    Default Re: SALE: JM-PhD-D1 PWM Hotwire Regulator

    Great work Jimmy.

    I would like two, but will come back later this evening with voltages.

    thanks,

    bill

  14. #14
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    Default Re: SALE: JM-PhD-D1 PWM Hotwire Regulator

    I'll take 3.
    #1 set voltage 18v, low voltage 26v
    #2 set voltage 13.1v, low voltage 12.5v
    #3 same as #2

    I need a 600+ watt version whenever you can make them. It needs to be at least 45v-60v and at least 25 amps.

    Paypal sent for $127.
    Endeavor to eschew obfuscation.

  15. #15
    Flashaholic* cnjl3's Avatar
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    Default Re: SALE: JM-PhD-D1 PWM Hotwire Regulator

    I will take one to start off with:
    set voltage 12.6V -- low cut off 13.6V


    Thanks!

  16. #16
    Flashaholic* Alan B's Avatar
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    Default Re: SALE: JM-PhD-D1 PWM Hotwire Regulator

    Quote Originally Posted by JimmyM View Post
    I have a wiring diagram that I'm going to try to post again. I'll see if I can put together a tutorial for the assembly. Until then it's essentially the same as assembling the JM-SST or AWR HorDriver.

    I CANNOT get ImageShack to upload a picture. Where do you folks host your pictures?
    Jim,

    We can put photos on my site if you like, right next to your code. We can set it up tonite if you wish. Ship me what you would like posted. I'll make a directory for your stuff.

  17. #17

    Default Re: SALE: JM-PhD-D1 PWM Hotwire Regulator

    For those placing orders could you put down your aplication so the less technically minded readers (ie myself), can get an idea of settings? See what Alan B did in the first reply.
    Peace!
    Sygyzy
    www.sygyzy.com | Hall of Fame: js, MrBulk, Litho123, Dark Zero, Lips, Milkyspit, StarHalo

  18. #18

    Default Re: SALE: JM-PhD-D1 PWM Hotwire Regulator

    for 2 . Details in paypal transactions for voltage. JIC I'll relist here. One at 22.5 bulb voltage and the other at 23.5 with both packvoltage cutoffs at 24 volts.
    Last edited by Bullet Bob; 05-14-2009 at 08:57 AM.

  19. #19
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    Default Re: SALE: JM-PhD-D1 PWM Hotwire Regulator

    O.K. Jim. I think I've got it figured out.

    I want to start out with one driver.

    Will be running 8 x 18650 cells powering a 12 v 35 w Hikari bulb.

    Max voltage for the bulb is 22.5 (Lux Luthor's chart), so set driver at 22.5 max.

    EDIT
    Min voltage for the pack should be 24v (this would be discharging each cell to 3 v. I assume this is safe since protection kicks in at 2.5 v)
    Last edited by william lafferty; 05-14-2009 at 07:49 AM.

  20. #20
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    Default Re: SALE: JM-PhD-D1 PWM Hotwire Regulator

    I'll take 1 driver:
    Set voltage: 13.0V, low volt: 11.0V

    Please estimate the shipping to Taiwan for me.





    EDIT:

    with s/h of First Class Mail International to Taiwan
    Last edited by NetKidz; 05-14-2009 at 06:27 PM. Reason: PP sent

  21. #21
    Flashaholic* LumenHound's Avatar
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    Default Re: SALE: JM-PhD-D1 PWM Hotwire Regulator

    I'll take 2 please.

    #1
    output voltage set to 20.6
    cut off set to 16.2

    #2
    output voltage set to 16.5
    cut off set to 11.7

    Shoot me a PM with shipping costs to Toronto and I'll PayPal the funds instantly.
    I'll PM you my address so you can enter it into the postage calculator at USPS.com

    Last edited by LumenHound; 05-15-2009 at 08:35 AM. Reason: paypal

  22. #22

    Default Re: SALE: JM-PhD-D1 PWM Hotwire Regulator

    I will take two drivers

    Set voltage 7.2V, cutoff voltage 6.0V for a Philips 5761.
    Set voltage 13.8V, cutoff voltage 12.0V for an Osram 64625.

    These are my guesses from my gleanings of LuxLuthor's writings. I have not built any lights with these bulbs yet.

    Total $87.00. PayPal Sent!

    Thanks for making this happen. I really kick myself for not jumping on the JSS buys, and this is way to cool not to grab.
    Last edited by CancerLad; 05-13-2009 at 08:00 PM. Reason: poor vertical singing

  23. #23
    Flashaholic* cnjl3's Avatar
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    Default Re: SALE: JM-PhD-D1 PWM Hotwire Regulator

    I chose set voltage 12.6V for double trouble '625 and WA-1166.
    '625 will draw 9.3amps
    WA-1166 will draw 2.05amps
    Amps from LL's thread:
    http://www.candlepowerforums.com/vb/...d.php?t=179748

    Quote Originally Posted by sygyzy View Post
    For those placing orders could you put down your aplication so the less technically minded readers (ie myself), can get an idea of settings? See what Alan B did in the first reply.
    +1 on the photobucket.com
    Quote Originally Posted by JimmyM View Post
    Where do you folks host your pictures?

  24. #24
    *Flashaholic* LuxLuthor's Avatar
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    Default Re: SALE: JM-PhD-D1 PWM Hotwire Regulator

    Jimmy, lock me in for 6 please. I can wait to see how hard it is to program (with software code setup), vs. giving you a list. This is in addition to any test units. Send payment ($250) now?

  25. #25
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    Default Re: SALE: JM-PhD-D1 PWM Hotwire Regulator

    Quote Originally Posted by LuxLuthor View Post
    Jimmy, lock me in for 6 please. I can wait to see how hard it is to program (with software code setup), vs. giving you a list. This is in addition to any test units. Send payment ($250) now?
    Sure. Send it along.
    Steps for setting the voltages.
    Set low voltage point first.
    1) Turn voltage adjust pot counter-clockwise several turns (output adjusts ~4V per turn)
    2) Set power supply to low voltage point voltage.
    3) If output is steady... Turn screw clockwise until output pulses
    3a) If output is pulsing... Turn screw counter clockwise until pulsing stops.

  26. #26
    Flashaholic* leukos's Avatar
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    Default Re: SALE: JM-PhD-D1 PWM Hotwire Regulator

    Congratulations, JimmyM on bringing such a fantastic product to market! Very reasonably priced for such a quality product!
    Light is sweet and pleasing to the eyes....

  27. #27
    Flashaholic*
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    Default Re: SALE: JM-PhD-D1 PWM Hotwire Regulator

    Quote Originally Posted by leukos View Post
    Congratulations, JimmyM on bringing such a fantastic product to market! Very reasonably priced for such a quality product!
    Thanks, I appreciate it. It was a lot of work. If it weren't for the input of many (Especially AlanB) none of the forthcoming Microcontroller/PWM based regulation solutions would have come to fruition any time soon. I had to learn about microcontrollers and C programming.
    I've got 70 boards built so far. 10 at a time. I'm very confident in reflowing the tiny 20QFN package now. It's 4mm x 4mm, 5 pins per side with no leads.
    I'll be basing most of my furture work on this chip. With the possible exception of the X1. It will have a lot more features and require more pins, but, who knows.

  28. #28
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    Default Re: SALE: JM-PhD-D1 PWM Hotwire Regulator

    AlanB and niner SHIPPED 5/14

    I'll be setting the other orders tonight.

    I'll be updating the top post to clarify what is required for programming.
    You DO NOT NEED a computer and programmer to use this board.

  29. #29
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    Default Re: SALE: JM-PhD-D1 PWM Hotwire Regulator

    Thanks Jim. I guess I should see them tomorrow. I could just drive over there and pick it up

    Well, actually, I'm waiting for Kiu socket to show up, so there's not much I can do right the way.

  30. #30
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    Default Re: SALE: JM-PhD-D1 PWM Hotwire Regulator

    Quote Originally Posted by niner View Post
    Thanks Jim. I guess I should see them tomorrow. I could just drive over there and pick it up

    Well, actually, I'm waiting for Kiu socket to show up, so there's not much I can do right the way.
    Yeah, really. I noticed in your address how close you are.
    LuxLuthor is just down the road from me too. Small world.

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