Found on Popular Electronics from 1970, this circuit fires a xenon lamp producing a C1-dependent flash. The circuit is suitable for 110 V mains.
This current meter with many scales was found in a 80s American documentation. The operational amplifier...
This circuit allows you to program a resistance by combining the selected resistors. The circuit...
This circuit is from a documentation on the MC1539 from Motorola and may, however, be implemented...