Fig. 1 - Electronic Resistive Load - 50A Power Supply Test with PCB You know that moment when you have a power supply to fix, you do the service and the supply works, but you don't know if it will support a large load? I came across a problem li…

Fig. FM Transmitter 75 to 108MHz using BA1404 IC with PCB This is a Stereo FM Transmitter , based on the BA1404 Hi-Fi Integrated Circuit, which is a stereo FM modulator that creates composite stereo signals, with low consumption, maximum 3mA , an…

Fig. 1 - 2.5KM FM transmitter, using transistor 2N3866 with PCB This is a simple  FM transmitter , with great range, being able to reach more than 2.5 km of distance, using a suitable antenna, powered by a power supply or a 12Vdc battery. The circ…

Fig. 1 - 14V 4 Channel 200W MOSFET Quad Bridge Power Amplifier using TDA7850 with PCB This is a  14V 4 Channel 200W MOSFET Quad Bridge Power Amplifier , it uses an  TDA7850 Integrated Circuits , in  Quad   Bridge Mode  to drive four power speakers. …

Fig. 1 - 140W Class AB Amplifier using MJL4281A and MJL4302A transistors with PCB This is a simple 140W Class AB amplifier using MJL4281A and MJL4302A transistors , which stands out for its simplicity, quality, and is a moderate amplifier to build. …

Fig. 1 110/220VAC 4 Step Control Touch Dimmer Switch Lamp Circuit with PCB This type of circuit is widely used in lampshades that are sold in residential lighting stores, it activates an incandescent bulb through the touch on the device's casing…