Light Dark switch activated relay circuits

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This Light Dark switch activated relay circuits schematics are the simplest electronic circuits that can help you to activate other electronic device at the light or dark . This Light Dark switch activated relay circuits are very simple and require one electronic relay and other few common components that are not critical . For electronic project you need to use a 5-6 volts electronic relay . The R2 potentiometer is used to adjust the trigger on level .The diode in the diagram shows to be 1N914. This is ok if you have a light-duty relay, also the 1N914 is a signal diode so actually does not qualify. If you don’t find the 1N914 you can substitute it with a 1N4001 diode (or better) instead. The 2N2222 (Q1) transistor can be substitute with :NTE123A, ECG123A, PN100, or other similar types . The R1 component is a photo resistor .

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Light switch activated relay circuits diagrams

Dark switch activated relay circuits diagrams

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Light Dark switch activated relay circuits

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