This simple AM transmitter include of many parts. There is a transistor Q1 act as increase the audio signal (AF) from the crystal microphone and a resistors-R3 that limit amplitude of sound signal is increased by Q1 The transistor – Q2 generate a radio frequencies (RF) in form of the colpitts oscillator circuit. The inductance […]
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This is the small FM transmitters using one transistor and 1.5 volts battery as power supply, in 98MHz to 100 MHz FM frequency range. The coil-L is 8 turns of 18 swg wire wound with a inside diameter air core of about 5mm. Then stretch the coil to width of 9 mm. The T1 use […]
As the 200 watt inverter Many people want to create a project of large power inverter about 500 watts. In order to use the multiple appliances at the same time. And can also be used on a large bus as a bus or coach, too. Adding a 200watt into 500 watts is simple.We use the […]
This is an simple op-amp IC tester circuit that cheap and easy to build. for test many op-amp ICs fast check. How it works In Figure 1 is the schematic diagram of this tool, that is used to generate the square wave. The working of circuit for the OP-AMP is the tested IC will generate […]
We can modify the dc digital meter circuit to smart full function multimeter, that versatile available. For example : measure DC voltage, ACV, DC Amp meter, AC Amp meter and as the Ohms meter etc. Try to build this projects to use it really worth Fully enjoy Special Feature DC Voltage: 200mV, 2V, 20V, 200V, […]