Introduction: How to Make Remote Tester With C945 Transistor

About: Share diy projects to those who have the same hobby with me

Hii friend,

Today I am going to make a circuit of Remote tester using C945 transistor and photo-diode.We can use this circuit for checking all remotes.

Let's get started,

Step 1: Take All Components As Shown Below

Components requires -

(1.) LED - 3V x1

(2.) Photo-diode x1

(3.) Transistor - C945 x1

(4.) Remote (for checking purpose)

(5.) Battery - 3-3.7V (we can use mobile battery of 3.7V)

Step 2: Circuit Diagram

Connect all components according to the circuit diagram.

Step 3: Connect Transistor

Connect emmiter pin of transistor to -ve pin of the battery as solder in the picture.

Step 4: Connect LED to the Circuit

Next we have to connect LED to the circuit.

Solder -ve pin of LED to collector pin of the transistor and

solder +ve pin of LED to +ve of the battery.

Step 5: Connect Photo-diode

Now we have to connect photo-diode to the circuit.

Solder -ve leg of photo-diode to the base pin of the transistor and

solder +ve leg of the photo-diode to +ve pin of the battery as you can see in the picture.

Step 6: Circuit Is Ready

Now our remote tester circuit is ready.


Press any button of Remote towards photo-diode.When we will press any button of remote towards photo-diode then LED will blink.If LED is not blinking then Remote is not working.

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Thank you