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24v DC is a very popular voltage used in industrial settings. This hobby circuit below was designed to accept four different 24v DC alar... -
Many times the hobbyist wants to have a simple, dual power supply for a project. Existing powersupplies may be too big either in power ou... -
The LM3909 is an integrated circuit (IC) which will flash a light-emitting diode (LED). Using only two extra components and a batter... -
The circuit presented here can be used for connecting two telephones in parallel and also as a 2-line intercom. Usually a single telephone i... -
When turning a computer on and off, various peripherals (such as printers, screen, scanner, etc.) often have to be turned on and off as ...
