Infrared Remote-Control Tester Circuit


Posted on Jan 29, 2013

The infrared remote-control tester uses a sensitive PN-type solar sensor that is connected directly to a Darlington amplifier made up of transistors Q1 and Q2. Biasing is provided by R1 and PI, a variable resistor that serves as a sensitivity control. The collector lead of Q1 is the output lead of the Darlington amp, and it is connected to a red LED and the primary of transformer Tl. The function of Tl is to convert the low-voltage output signal to a level high enough to drive a small piezo disc. That disc makes a clicking sound when the sensor picks up an infrared signal that is varying in frequency or amplitude.


Infrared Remote-Control Tester Circuit
Click here to download the full size of the above Circuit.

The infrared sensor will also pick up visible light. The use of an IR filter (Wrat- ton #87) is recommended.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Metal detector circuit with TDA0161
Tone-actuated relay
555 IC PWM Motor Control with Current Limiter
How to Make a 25 Amp 1500 watts Heater Controller Circuit
tda7262 stereo 20 watts audio amplifier circuit design
Analog Audio Delay Line(3d Sound)
simple low cost digital code lock
555 pulse timer circuit diagram basic
arduino yogurt maker
Full-duplex Intercom
Adjustable Power Supply with Charger Output
Telephone Circuits
After the restructuring of AC and DC arc welding machine circuit



Top