This circuit fires with the noise captured by the touch of a sensor. Signal shapes are given next to the diagram. The circuit is from the 80s, using components from that time.
We found this two stage transistor amplifier circuit using RC coupling in a magazine published in...
Mouser Electronics has in stock Texas Instruments Buck controllers LM5145 to operate with voltage...
This circuit was found in Radio Electronics from the 90s. The CMOS integrated circuit is a PLL not...