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Free Electronic ProjectsElectronic hobby projects, Electronic circuit, Circuits, Hobby circuits, Digital circuits, digital e...Digital clock circuitOne , designed to 1 . familiar with the IC 's pin arrangement . 2 . to acquire all the chip logic fu...Serial Interface Keyboard Controller circuitSK5278Abstract : SK5278 is a managed 16 key keyboard controller , the device has to shake the internal pro...IPM drive and protection circuitp> Abstract: This paper introduces the basic operating characteristics of the IPM and the IPM...Inverter circuit board and maintenanceA common style car on the market the main indicators of inverter products Input voltage: DC 10V ~...Power supply switching protection circuitAbstract: In order to switch to emergency power failure in the harsh environment and safe conditions...Quick Introduction to Voice Trilogy Integrated CircuitsBasics Young enthusiasts started his electronic technology, we might start with the most innovati...LM567 Universal tone decoder integrated circuit applications567 for the general tone decoder, when the input signal in the pass band to provide saturated transi...DC motor control circuit-4Commutator permanent magnet DC motor, is a very broad application. Just add the appropriate voltage ...Wireless remote controlled switch circuit (b)Wireless remote control receiver controller circuit components selected R1 ~ R11 1/4W carbon film re...Relay control circuit module and the principleCan directly promote the work of the CMOS integrated block circuit relay Circuit in the electroni...Wireless Transmitter Circuits-10.5W VHF TV Transmitter circuit 200MHz to 400MHz Frequency Modulation Circuit 433MHz trans...Simple short circuit tester coilsUsing the 555 integrated timer. Add a small amount of external components, can be made simple and pr...Miniature DC Motor Drive Test Analysis circuit1 Introduction DC motor is the first invention can convert electrical energy into mechanic...Wireless ward display circuit with wireless transmitter and receiver using M303SM303RThis circuit uses the wireless transmission, the use of stable performance and digital radio transce...Easy wireless microphone singing circuitKaraoke microphone is essential, if the wired microphone to wireless microphone, singing to be more ...Wireless remote controlled switch circuit (d) This case describes a 10-channel wireless remote control switch, it uses a 10-channel wirel...Optocoupler drive circuitFirst, the circuit using optocoupler Why? Electrical isolation requirements. Between A and B circ...Cable duplex intercom circuit Figure 1 is a fan-made electronic cable for duplex intercom (intercom wired telephone can be...Ultrasonic transmitter - receiver circuits40kHZ ultrasonic transmitter circuit (1) 40kHZ one ultrasonic transmitter circuit, the F1 ~ F3 thr...