This circuit is from an old American publication. It divides a 40 to 60 MHz TTL signal by integer values such as 2, 3 or 4. The circuit must be powered by 5 V.
Found in a Hands On Electronics from the 80's, this circuit activates a relay with alternating...
The circuit presented was suggested by the National Semiconductor's Linear Applications Handbook of...
Found in 90’s English documentation, this rising and falling siren, manually activated, drives a...