This circuit uses a capacitor that depends on the frequency of the crystal. We found it in a 1967 documentation. The maximum frequency is around 100 kHz.
This circuit was found in an old American optoelectronics manual. The circuit makes use of an...
This is a traditional flasher configuration with two neon lamps. The frequency is given by the 100 nF...
This article was obtained in a French magazine Nouvelle Electronique from 1994. It can be easily...