Suggested for use in cars and motorcycles, this circuit was found in a 90s Popular Electronics. The MOSFET can be anyone that supports the current of the lamps. Adaptations can be made to use LEDs.
This circuit for old analog TV was found in the May 1978 issue of Radio Electronics magazine. The...
This circuit is from the 80's, making use of components of the time. What the circuit does is...
This filter configuration was found in an 80's documentation. The circuit has the frequency...