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"A simple Remote tester to check all types of Remote hand sets……. This simple remote tester can be a good tool to check whether a remote hand set is working or not. It uses the commonly available IR sensor TSOP 1738.The IR sensor has a PIN photodiode and an FET signal amplifier enclosed in an Epoxy case. The sensor requires five volts for its operation and its output is active low. Normally its output gives + 5 volts and goes down to zero when it receives 38 KHz pulsed IR rays. When the remote handset is focused on to the sensor and any one button is pressed, buzzer beeps and LED blinks indicating that the handset is OK. Remote Tester Circuit Diagram "

Remote Tester Circuit

DiSEqC Test Cihazi Devresi (DiSEqC-Tester+ , used ATtiny2313)

DiSEqC Test Cihazi Devresi (DiSEqC-Tester+ , used ATtiny2313)

Acoustic Logic Tester devresi

Acoustic Logic Tester devresi

"Mosfet TESTER This is a variation on the astable multivibrator. Circuit was recently developed to test for N-mosfets(the power kind e.g irf 830) I don't claim circuit can test all bad mosfets or all fault mosfet conditions. If mosfet is working it will operate in the astable multivibrator circuit causing the Led to flash. A bad mosfet will not cause the LED to flash. Below is the circuit diagram, the other half of the astable utilizes an npn transistor to make the circuit cheap. Almost any npn transistor will work in this circuit. The npn transistor to the right is used as a common emitter buffer that also drives the led as it receives pulses from the mosfet drain. Orijinal görüntüsünü görmek için buraya tıklayın. 622x444 px. note diode is a light emitting Diode"

Mosfet TESTER