Found in an American publication from 1968, this circuit generates pulses at a rate of 2,500 per second. The transistor can be replaced by a modern equivalent.
This thermostat was found in a 1997 publication. It can be powered by 6 V with the use of a...
The circuit shown in the figure causes the lamp to light up after a certain time determined by the...
This is the normal circuit of a relaxation oscillator using an unijunction transistor such as the...