This circuit has tone control, and its power depends on the supply voltage. The circuit is from the Philips integrated circuits manual from 1990.
The frequency of TTL square signal is divide by 5 with this circuit. Power supply is 5 V and the...
This interesting circuit was obtained from a Poptronics of February 2001. The American magazine no...
This circuit was found in an English magazine from 1983, but it can be assembled with BC548 for...