Forums > Technical Discussion > RGB 3w driver help
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stranger
4 posts
Location: Fort Collins, CO, USA
stranger
4 posts
Location: Fort Collins, CO, USA
Posted:
If I wanted to make a ( 3w RGB LED module ) -blink- about 60 times per second, what driver would allow me to do that in unison with a 3.7 volt 1000mAh battery (DC)? These LEDs are -current driven- at 350ma, which means that I have the drivers which run them at 350ma, but I just want them to blink fast.
I am a DIY'er and would love to be able to mod this myself so these LEDs will blink fast. Cheap solution?
These are what I have:
3W RGB LEDs
Non-Https Image Link
Quality AMC7135 350mA Regulated Circuit Board for DIY Flashlights 20-Pack
Non-Https Image Link
Help? Thoughts? Ideas?
If I wanted to make a ( 3w RGB LED module ) -blink- about 60 times per second, what driver would allow me to do that in unison with a 3.7 volt 1000mAh battery (DC)? These LEDs are -current driven- at 350ma, which means that I have the drivers which run them at 350ma, but I just want them to blink fast.
I am a DIY'er and would love to be able to mod this myself so these LEDs will blink fast. Cheap solution?
These are what I have:
3W RGB LEDs
Non-Https Image Link
Quality AMC7135 350mA Regulated Circuit Board for DIY Flashlights 20-Pack
Non-Https Image Link
Help? Thoughts? Ideas?
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BRONZE Member
old hand
1,174 posts
Location: Great Malvern [UK]
old hand
1,174 posts
Location: Great Malvern [UK]
Posted:
Have you tried just sticking a small (powerful) resistor inline with a power transistor? You can then switch that from a lower power controller like a PIC or a simple 555 timer based circuit.
Hyperlights do something like this (in a more sophisticated way)...
Have you tried just sticking a small (powerful) resistor inline with a power transistor? You can then switch that from a lower power controller like a PIC or a simple 555 timer based circuit.
Hyperlights do something like this (in a more sophisticated way)...
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BRONZE Member
stranger
4 posts
Location: Fort Collins, CO, USA
stranger
4 posts
Location: Fort Collins, CO, USA
Posted:
Hi HyperLight,
Thanks for your response.
I have checked into the 555 timer but the maximum output allowed for this unit is 200ma where as I need 350ma for maximum brightness.
I think I'm thinking of this in a different way than you. Could you explain a little more please? I'm not sure how the power transistor would work to oscillate the frequency and make the LED blink from an inline resistor fed to the power transistor. I am confused on how this would work. I've never used power transistors.
Hi HyperLight,
Thanks for your response.
I have checked into the 555 timer but the maximum output allowed for this unit is 200ma where as I need 350ma for maximum brightness.
I think I'm thinking of this in a different way than you. Could you explain a little more please? I'm not sure how the power transistor would work to oscillate the frequency and make the LED blink from an inline resistor fed to the power transistor. I am confused on how this would work. I've never used power transistors.
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BRONZE Member
old hand
1,174 posts
Location: Great Malvern [UK]
old hand
1,174 posts
Location: Great Malvern [UK]
Posted:
The 555 timer does the blinking.
The power transistor allows your 555 timer to switch on/off current to the resistor / LED.
Have a look at the section entitled "Using a transistor as a switch" here: https://www.kpsec.freeuk.com/trancirc.htm
The 555 timer does the blinking.
The power transistor allows your 555 timer to switch on/off current to the resistor / LED.
Have a look at the section entitled "Using a transistor as a switch" here: https://www.kpsec.freeuk.com/trancirc.htm
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