Found in an Elektor from the 90s, this TTL circuit can be used as a shield without any bouncing problems. The circuit must be powered with 5 V.
We found this circuit in a publication from the 1970s. It produces intermittent clicks on a...
We found this circuit in a Philips documentation from 1969. It makes use of transistors of the...
This circuit was found in a 1999 English magazine, but can be easily assembled with BC548...