Richardcavell
Member
Hi everyone.
Today I built this circuit, with a difference. I put pots in series with each of the resistors. It oscillates at about 2 hertz.
1. What's the standard method of varying the timing of the circuit?
2. Is it usual to vary the capacitance in a circuit like this? I thought of switching between a 10 uF and 22 uF cap, or switching a second 10 uF cap in parallel with each, but it seems easier to vary the resistance.
3. Varying the 47k resistors makes a huge difference to the timing. But what does varying the 470 resistors do? It seems to alter the brightness of the LED but doesn't do anything to the timing.
Richard
Today I built this circuit, with a difference. I put pots in series with each of the resistors. It oscillates at about 2 hertz.
1. What's the standard method of varying the timing of the circuit?
2. Is it usual to vary the capacitance in a circuit like this? I thought of switching between a 10 uF and 22 uF cap, or switching a second 10 uF cap in parallel with each, but it seems easier to vary the resistance.
3. Varying the 47k resistors makes a huge difference to the timing. But what does varying the 470 resistors do? It seems to alter the brightness of the LED but doesn't do anything to the timing.
Richard