How to run higher current through a 555 timer using transistors? Answered
Hi, I'm trying to run 2 1W LEDs (each one is 3.5V and 350mA) through a 555 'one-shot' timer circuit. 555 timer has a current limit of 200mA but the LEDs have a rated current of 350 mA.
How do I spec the proper transistor to use to boost the current? I'm using a 12V power supply.
I'm also not 100% sure about how to add the transistor to my circuit, though I'm pretty sure that the LED/LED resistor/(+) connection go on the collector side, (-) on the emitter side, and pin 3/base resistor on the base side of the transistor.
Any insights will be greatly appreciated!