This circuit was found in ancient American documentation. It provides a 70 Vpp signal at frequencies up to 100 kHz. Observe the high supply voltage.
This circuit is from a Radio Electronics magazine from February 1962. It makes use of an old...
Microchip's MCP6411 Operational Amplifier can operate at voltages of 1.7 V and has a quiescent...
This circuit powers a small 5 W lamp that goes out when power is lost. The circuit can use the...