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.

Audio Visual Effect (CB16626E)
We found this circuit of light and sound effects in a 1987 publication. The sounds are reproduced by a...
1 500 000 gain Amplifier (CB6641E)
We found this circuit with transistors in a Philips documentation from 1968. The double transistor...
Audio Output Stage (CB466)
This simple circuit can be used as audio output stage for intercoms, experimental radios and other low...