I'm new to the forum—and VERY new to LED circuits. I am, however, a well-seasoned computer support technician. That means I'm technical enough to understand the old saying: "You can never give an engineer too much information"—which is why this post is rather lengthy. I' m also experienced enough to be quite leery of unexpected but spectacular olfactory, aural, or visual displays or special effects from overloaded circuits or over-driving electronic components. Some of that knowledge was deservedly, though ignorantly earned from shall we say, "hands-on" tutoring. (Isn't it odd how the smell can linger for days in an office setting?) Humor aside, I probably have a good, layman's knowledge of circuitry and simple schematics—though I'll never claim to be an electrical engineer or an electrician. This is why I'm asking for help today. Please feel free to critique or ask questions.
I'm installing LEDs in my new, over-the-stove microwave's "range hood light" light cavity. I'm trying to save the four or more bulbs per year at $4.00 a pop plus the electricity for 5-6 hours nightlight-like usage—never mind the full-power cooking time. I'm considering two fairly simple circuits:
Option 1
Option 2
Option 1 is preferred. My wife will be using the installation and is very unimpressed with anything she considers needless complex or technical. ("Really, a dimmer, dear! Why would I use a dimmer? Keep it simple") J
I've drawn a very rough schematic but can't seem to insert it into the post.
It's probably a very good thing to avoid any whiff of an ancient, pagan-style burnt offering so I think I must applying resistance to each LED by stepping down the power supply's output voltage to match what the LED expects. What I don't understand is which value in the LED specs is used in an online resistance calculator. Just in case I leave out something crucial from the specs below, I'll post the URLs to the items.
Low Lumen LED
High Lumen LED
URLs
Low lumen
http://www.superbrightleds.com/moreinfo/high-powered/vollong-5w-white-high-power-leds/898/
High lumen
http://www.superbrightleds.com/moreinfo/high-powered/vollong-10w-high-power-planar-cob-led/979/2386/
Thank you in advance. I may be asking about the switch wiring in a future post if I can't figure it out.
I'm installing LEDs in my new, over-the-stove microwave's "range hood light" light cavity. I'm trying to save the four or more bulbs per year at $4.00 a pop plus the electricity for 5-6 hours nightlight-like usage—never mind the full-power cooking time. I'm considering two fairly simple circuits:
Option 1
- Power supply (120 or 240VAC in/12 or 24VDC out)
- Switch (rocker or rotary) 12/24VDC, using the proper amperage [leaning towards rotary]
- off, low, high or
- off, low, medium, high
- Two or three high power but lower-lumen LEDs (100-300 lumens, warm white)
- One, high-power, higher lumen LED (700-750 lumen, daylight white
- Miscellaneous heat/water resistant wires and connection insulators.
- Resistors soldered to each LED.
Option 2
- Power supply (120 or 240VAC in/12 or 24VDC out)
- Toggle switch (off, on)
- Dimmer
- Two or three high-lumen LEDs
- Miscellaneous heat/water resistant wires and connection insulators.
- Resistors soldered to each LED.
Option 1 is preferred. My wife will be using the installation and is very unimpressed with anything she considers needless complex or technical. ("Really, a dimmer, dear! Why would I use a dimmer? Keep it simple") J
I've drawn a very rough schematic but can't seem to insert it into the post.
It's probably a very good thing to avoid any whiff of an ancient, pagan-style burnt offering so I think I must applying resistance to each LED by stepping down the power supply's output voltage to match what the LED expects. What I don't understand is which value in the LED specs is used in an online resistance calculator. Just in case I leave out something crucial from the specs below, I'll post the URLs to the items.
Low Lumen LED
Continuous Forward Current | 750 | Forward Voltage | 3.6V |
LED Brand | Vollong | LED Package | 14.5 mm x 7.5 mm |
Lumen | 200 Lumen | Maximum Forward Voltage | 4V |
Maximum LED Junction Temperature | 120 | Operating Temperature | -35~+50 °C |
Peak Forward Current | 1000mA | Power Dissapation | 3W |
Reverse Current | 10µA | Reverse Voltage | 5V |
Storage Temperature | -40~+100 °C | Total Power Consumption | 3 Watt |
Viewing Angle | 120 degree |
High Lumen LED
Color | Cool White | Color Temperature | 5500 K |
Continuous Forward Current | 500 | Forward Voltage | 15.5V |
LED Brand | Vollong | LED Package | COB |
Lumen | 750 Lumen | Maximum Forward Voltage | 24V |
Maximum LED Junction Temperature | 105 | Millicandela | 131000mcd |
Operating Temperature | -20~+80 °C | Peak Forward Current | 600mA |
Power Dissapation | 10W | Reverse Current | 100mA |
Reverse Voltage | 5V | Storage Temperature | -30~+100 °C |
Total Power Consumption | 10 Watts | Viewing Angle | 170 degree |
URLs
Low lumen
http://www.superbrightleds.com/moreinfo/high-powered/vollong-5w-white-high-power-leds/898/
High lumen
http://www.superbrightleds.com/moreinfo/high-powered/vollong-10w-high-power-planar-cob-led/979/2386/
Thank you in advance. I may be asking about the switch wiring in a future post if I can't figure it out.