pic16f684 a high powered led and batteries.
i was wondering if theres any links online or if someone knows the best ay to complete this circuit. I need to create a bike light, design the circuit layout and the deign of the light. But im not to familiar with the circtuirty and wuld like to know if anyone knows and could help.
Update:
Components to make bike light
high powered led
transistors
pic16f684
Switch
Update 2:
Components to make bike light
high powered led
transistors
pic16f684
Switch
Update 3:
2 aa batteries
4
✅ Answers
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Here are some schematics for dynamo powered LED headlights but you can replace that with your battery source. You really only need diodes, LEDS, capacitors and a good electronics soldering iron that you can control the temperature so you don’t fry the LEDs. You don’t need a fancy microcontroller. If you want some blinking action you can just add a 555 timer circuit.
http://www.pilom.de/BicycleElectronics/DynamoCircu…
Once you have the circuit you want to build and breadboarded you’ll have to get a custom PCB for it. There are many YouTube videos and tutorials to help you do that. Good luck!
(Added later: Don’t need no stinking transistors either).
You’ll need much more than that to build a useable bike light – adequate optics and cooling for the LED, for a start.
Then, if you want to run a high power LED from 2 AA batteries, you’re already in trouble. Even Philips requires 4 AAs for their light.
And – no way around it – you’ll also need an inductor, some capacitors and a few resistors.
I’d suggest you go over to www.microchip.com (the manufacturer of the PIC) and look for circuit diagrams and software examples for DC-DC-converters (which is what you’ll need). Ideally, you’ll need a DC-DC-converter with a regulated output current of about 8 mA at up to 4 Volts output voltage and an input voltage in the 2…4 Volts range – which will run you head on into another problem: simple DC-DC-converters will be either step-up or step-down only, but as your possible battery voltage overlaps with the range of possible LED forward voltages, that will become a bit problematic in your case. Might just work, though, with a step-up converter, as long as the loaded battery voltage falls below the LED forward voltage (chinese flashlights apparently do that all the time…).
This is just a processor you will need circuitry to control the power to the LEDs.
Edit:
You need to control the transistors, the transistors control the power to the leds.
why do you need a computer?
why not just a battery and switch?