Found in a 1965 Electronic Design, this circuit limits surges in a load when power is applied. The diodes and SCR must be according to the load.
This low frequency oscillator with an operational amplifier of type 741 has adjustment of the mark...
This circuit was found in a Popular Electronics from the 90s. Transistors are general purpose...
The AT21CS11 memory device offers an extended voltage range to accommodate lithium-ion battery...