This circuit was used in tape recorders to clear the tape of any previous recordings for a new recording. The circuit is from a Radio Electronics dated September 1982.
The transistors T1 and T2 of this circuit can be the BC558. T3 can be a BD135 and T4 a TIP42. The...
In the figure we show a means of changing the output voltage of a fixed regulator, such as 7805 or...
We got this circuit in a publication of 1987. This is an audio limiter, a circuit that cuts peaks...