This circuit is from Mullard 1969 documentation. The circuit operates at a relatively high supply voltage and has a 10 Vpp output. The transistors are of the time, but admit equivalents.
This circuit was obtained in a 1985s English magazine. The circuit can still be assembled with...
This circuit was found in a 90s American documentation. The circuit uses an LED that can be of a...
The circuit presented is from the National Semiconductor's Linear Applications Handbook of 1994. We...