We found this circuit in a 1996 publication. Equivalent components can be tried, especially in the case of the photodiode. The circuit is powered by a 12 V source.
The CMOS TLC555 [equivalent to the bipolar 555] can be used as a monostable in the configuration...
This unijunction relaxation oscillator can be used as a very useful signal injector. The circuit is...
A low frequency or audio frequency generator is an almost indispensable instrument in which it...