This circuit uses NOR ports to generate signals up to 10 MHz, depending on the crystal. The supply can be done with voltages from 5 to 15 V and the signal generated is rectangular.
I found this circuit in an Electronics Handbook from 1989. The circuit can be assembled with a...
The TDA2613 is the mono version of the TDA1521A and has pinouts compatible with an integrated...
This sound effect circuit uses only one integrated. We found it in a 90's EDN. The effects can be...