D.I.Y. Incan Soft start

Just got on to programming in assembler, and now i can make sonething!
I made soft start circuit for my LI-ON Mag.
voltage and power hanling depends on power mosfet and 5v stabiliser
i am using IRLU2905 with 55V and 42A max, 50w is not a problem =]

nothing special, only prototype board

Sample video:

video1

video2


I am working on code for making it multilevel, it is almoust ready.
I wil need to reprogram the IC only!
It will be like this:

1-settable brightness with slow start
2-max 100% brightness with slow start
3-settable strobe
4-2% low brightness
5-set mode
5.1-set mode1 brightness (5-10-20-30-45-60-75-85%)
5.2-set strobe mode (pattern1, pattern2, pattern3 ... etc)

Controlling the board via power button.

It will be nice! What do You think?

I think that is friggin' awesome, good work!!

Just a suggestion, you should mount it Under the heatsync (metal Disc), 5761 or sim. big watt bulbs will eventually destroy it.

Aircraft800 said:

Just a suggestion, you should mount it Under the heatsync (metal Disc), 5761 or sim. big watt bulbs will eventually destroy it.

Click to expand...

I was thinking about it, if there will be a temperature problems, i can put there one more disc (made of something not heat transferring and not burning) behind the lamp socket

Excellant! agree would think about heat, insulation, melting.
50v bulbs and up:twothumbs

can someone tell me what is the purpose of this soft start?
is it to safe the bulb from instaflash?

nanotech17 said:

can someone tell me what is the purpose of this soft start?
is it to safe the bulb from instaflash?

Click to expand...

Yes, to safe the bulb from instaflash,
and if You are using cells like from DealExtreme ( witch has lower current protection), to be able to power on at FIRST click, and not double clicking or else.

yes, saving from instaflash is big plus especially when using a battery which has the nominal voltage of the bulb you what to use. Other advantage some believe will prolong the life of that bulb.

Willi Hunt maybe the father of regulated drivers. lots of info
http://www.cs.indiana.edu/~willie/lvr.html

MatajumotorS said:

Yes, to safe the bulb from instaflash,
and if You are using cells like from DealExtreme ( witch has lower current protection), to be able to power on at FIRST click, and not double clicking or else.

Click to expand...

jimjones3630 said:

yes, saving from instaflash is big plus especially when using a battery which has the nominal voltage of the bulb you what to use. Other advantage some believe will prolong the life of that bulb.

Willi Hunt maybe the father of regulated drivers. lots of info
http://www.cs.indiana.edu/~willie/lvr.html

Click to expand...

Nice work so far. Agree it needs to go behind significant heat protection. What are you going to use for the multilevel & programming it?

Man, have not heard 666 "Alarma!" trance in a long time that you used in your Video #2. I must have 15 CD's by them.

jimjones3630 said:

Excellant! agree would think about heat, insulation, melting.
50v bulbs and up:twothumbs

Click to expand...

He means 50W and up!

Nice!

some progress on firmware:

"1-settable brightness with slow start
2-max 100% brightness with slow start
3-settable strobe
4-2% low brightness
5-set mode
5.1-set mode1 brightness (5-10-20-30-45-60-75-85%)
5.2-set strobe mode (pattern1, pattern2, pattern3 ... etc)
" - test ok :twothumbs

- i have added low bat mode - works like that:
if bat drops below some point, output changes down to 30%( if it was not lower before)
- experimented with beeper - when enters low bat mode - beeps 3 times every 10 sec (but too low volume for now, will try others speakers)

Sounds cool. Sound like what i need to stop instaflashing these 1164s I have. Keep us updated.

I just linked over here from my PWM thread. This is nice stuff. I especially like the part count. That could definitely be made to fit under a KIU.
How are you driving the gate of the MOSFET?

JimmyM said:

I just linked over here from my PWM thread. This is nice stuff. I especially like the part count. That could definitely be made to fit under a KIU.
How are you driving the gate of the MOSFET?

Click to expand...

I am driving the gate directly, i use logic level mosfet.

MatajumotorS said:

I am driving the gate directly, i use logic level mosfet.

Click to expand...

Would you mind me asking what controller and MOSFET you're using? Also, what's the little TO-92 case device next to the 8 pin socket? I'd like to look at how small this could be made using different packages of the same components.

to92 is 5v regulator,
using all smd components it can be as small as FluPic - about 15mm dia
i am using pic12f683 because of hardware pwm and adc, but if you do not need low bat function i have made one proto using pic12f629 by software pwm
the mosfet... there is a place to choose
in prototype is used IRLU2905 with 55V and 42A max, RDS(on) = 0.027Wi think up to 50w it is ok.

Just added videos:

1. operating the flashlight

2. bat low mode simulation

MatajumotorS said:

Just added videos

Click to expand...

Those are very good videos - that's an impressive starter, and looks like it has an intuitive UI. How big is the whole thing? In your post #17 you mentioned a 15mm FluPic - that's tiny!

That things got a low battery beep!? DUUUUUUDE! :rock: