A simple circuit known as the IR Remote Tester can be a useful tool for determining whether or not a remote control device is functional. It makes use of the widely used IR sensor TSOP 1738.
A PIN photodiode and a FET signal amplifier are housed inside an epoxy shell on the IR sensor. I’m going to explain how to build an IR remote tester now using fewer parts.
Components Required
- LED – 1
- TSOP 1738 [ IR receiver 38kHz]
- IC 7805 -1
- 9v Battery and clip -1
- Resistor (100 Ohm) -1
- Breadboard
- Male to Male Jumpers
Circuit Diagram
- Connect the GND and Vs of Tsop1738, respectively, to the IC 7805 Ground and Output pins.
- Connect a 100 Ohm resistor between the Vs pin of the tsop1738 and the +ve and -ve pins of the LED.
- Connect the +ve of a 9V battery to the IC7805’s input pin and the -ve of the battery to the IC7805’s GND.
- Completed construction of the circuit.
- The LED in the circuit blinks when you push any of the IR remote’s buttons.
Working
A buzzer and a yellow LED are connected to the IR remote control tester circuit as indicators. A 9-volt battery is utilized to power the circuit, and an LM7805 voltage regulator is also incorporated to supply the circuit with a 5-volt voltage supply. The positive connection of the battery is connected to pin number 1 of the LM7805, while the ground terminal is linked to pin number 2.
The first number is connected to the ground, while pin 2 of the TSOP1738 is directly connected to pin 3 of the LM7805. The negative terminal of the yellow LED is connected with pin number three of the TSOP1738 using a 150-ohm resistor, and the buzzer is connected to the same terminal through a 1K resistance.
When we touch any button on the IR remote after turning on the circuit, the remote sends some IR pulses at a frequency of about 38 kHz. The TSOP1738 sensor detects these pulses and, as previously mentioned, outputs a LOW signal. This LOW output signal is used to turn on the buzzer and LED.
Therefore, when the TSOP1738’s output signal is low, the buzzer begins to beep and the LED begins to glow, which is a sign that the remote control is functioning properly. The remote control is not functioning properly if this IR remote tester circuit doesn’t react to button presses from the remote control.
Conclusion
Finally, we have completed designing IR Remote Tester. Superkitz will be back soon with more informative blogs soon.
