modified 12 years ago

2 LED Oscillator

01:07:22

An oscillator that powers 2 LEDS, with quite different duty parameters ( determined by resistor values)

published 12 years ago

Sine_eyed

12 years ago

Your oscillator isn't oscillating! You better double check those resistor values you mentioned. Capacitors are hugely important in this circuit as well, and will have a greater effect on frequency than the resistors will. 47uF is a good value- not difficult to work with so maybe leave those as they are. However the resistors will have to change if you hope to get your blinkie blinking. At least the two in the middle. Adjust them to 18K for a frequency close to 1Hz. And if you want your moneys worth out of the LEDs simply reduce the series resistors to 150ohm- that'll get you pretty darn close to 20mA. Trust me- plug in those numbers and watch the magic happen!.. ;^)

jimblair

12 years ago

Thx...I adjusted the resistor values to bring the oscillations to 1Hz, but I have to adjust the simulator freq every time I load the circuit...that is the issue with lock.

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