This TTL circuit found in the September 1996 issue of Electronics Now magazine doubles the frequency of a rectangular signal. The power supply must be 5 V.
This circuit was originally recommended to operate with the emitter of the previous circuit but...
When the probes of this circuit meet water, the relay closes its contacts. The circuit is from a May...
The power supply shown can supply voltages of approximately 0 V to 12 V with a maximum current of 4.5 A,...