Powerful LED flasher
This is the circuit diagram a powerful LED flasher. High power LEDs are very common in the market now and a 1W high power LED is used here. Transistors Q1 and Q2 are wired as an oscillator which produces positive pulses of width 20ms @ ½ Hz. Transistor Q3 and MOSFET Q4 inverts this pulse and MOSFET Q5 drives the LED D1.
Circuit diagram .
- LED D1 is a 1W high power LED.
- Capacitors C1 and C2 must be rated 10V.
- Circuit can be powered from two AA cells connected in series.
- The peak LED current is set to around 250mA.