This receiver circuit was found in a Hands On Electronics from the 90s. The circuit uses a PLL 561B that is not a common component today.
This circuit with two HT2030s powers 6 LEDs in a decorative flashing system. The circuit is from...
The integrated circuit used in this 70's application is not common today. The circuit consists of a small...
This circuit is from the LM317's own manual obtained from an old documentation. The IC should be...