This PUT oscillator circuit has a frequency of 1 Hz. We find it in a General Electric documentation from the 80's. A recommended application is on flashers.
This circuit sensor is an NTC with a resistance of the order of 2k. The SCR can be from the TIC...
The load current can be adjusted up to about 1 A. The transistor can be TIP32 or TIP42. The...
This oscillator with common general-purpose transistors appeared in Radio Electronics magazine in...