This sequential circuit of LEDs was found in a Popular Electronics from the 90s. The circuit can be programmed and an adaptation consists of using optical couplers to drive power loads.
The Micro-Lock line of Molex connectors can be obtained from Mouser Electronics. These connectors...
This light sensor shield, with operational and TTL compatible output or microcontroller was found...
This sensitive amplifier for low current measurement uses a differential amplifier configuration with...