Interval for wiper (CB22113E)

This windshield wiper interval was found in an old documentation. The SCR can be the C106 and the transistor a BC548.

Simple field strength meter (CB4114E)
The more sensitive the instrument used the better the sensitivity of the indicated meter. We...
Telephone dialing simulator (CB8658E)
Based on the 4017 integrated circuit, this circuit of a European 303 Circuits from the 90s,...
White Noise Generator (CB19614E)
The integrated circuit used in this project is unusual and it includes internal transistors that...