Found in an old Popular Electronics, this circuit warns when a remote lighting system is not working. The circuit uses an LDR as a sensor and the components used are quite common today.
This circuit uses the 741 Operational Amplifier to drive two LEDs. The LEDs indicate the signal of...
This power supply is indicated to power small loads up to 30 mA. The original output voltage is 6...
Three LM158, LM258, LM358, or LM2904 operational amplifiers are used in this instrumentation amplifier....