This circuit for audio signals was found in the March 1990 Radio Electronics magazine. The circuit uses a unusual optocoupler that can be replaced with an equivalent one.
National Semiconductor suggests the circuit in the figure that uses two operational amplifiers of type...
This low speed circuit was obtained in a 1966 Microelectronic Design. The circuit has a 10 MHz...
In the figure we show how to connect two monostables 555 so that at the end of the first timer, the...