Hi everyone,
I am planning to build a Led tail lamp assembly for my bike to replace its present bulb setup. So Ill be using 5 mm led's of the 20ma type.. I'll do the lights for the pilot tail lamps seperately, but for the brakes, I need a flasher... Plan to use a 7x5 led array of normal led's. Vertically, I have space only for 5, but horizontally, I can adjust 7 to 5,6 or 8 whichever gives me an easy arrangement when driven with voltage drops and all. The pattern i need is level type, ie, 1st row alone, 1+2nd, 1+2+3 and when 5 rows full, resets and starts or decreases, either not a problem.. Could somebody help me on a circuit to drive this? The simpler the better. Currently the only thing I can think of would be LM3914/3915 driven by a 555 and then transistors to drive led stips. Or cd4017 with diodes, i prefer not to use too many branched diodes. Any help please?
I am planning to build a Led tail lamp assembly for my bike to replace its present bulb setup. So Ill be using 5 mm led's of the 20ma type.. I'll do the lights for the pilot tail lamps seperately, but for the brakes, I need a flasher... Plan to use a 7x5 led array of normal led's. Vertically, I have space only for 5, but horizontally, I can adjust 7 to 5,6 or 8 whichever gives me an easy arrangement when driven with voltage drops and all. The pattern i need is level type, ie, 1st row alone, 1+2nd, 1+2+3 and when 5 rows full, resets and starts or decreases, either not a problem.. Could somebody help me on a circuit to drive this? The simpler the better. Currently the only thing I can think of would be LM3914/3915 driven by a 555 and then transistors to drive led stips. Or cd4017 with diodes, i prefer not to use too many branched diodes. Any help please?