Active with the output at the high level, this oscillator was found in November 1984 Radio Electronics magazine. The supply can be between 3 and 12 V and the output signal is rectangular.
This fast trigger circuit allows the counting of up to 300 pulses per minute. The circuit is from...
This long delay circuit was found in the July 1973 Radio Electronics magazine. The capacitor...
In the figure we show how to use an LM324 as a voltage comparator the reference voltage is...