Hy, Guys this is me again back with a new project.
This is a very simple and small. Even you can put it in your pocket.
It contains only 3 components in main. It tests the remote signal when
a button is pressed I usually use it to test my remote.

Step 1:

1. TSOP 1738
2. Buzzer
3. Battery
4. Battery Holder
5. Double Sided Foam Tape
6. Electrical Tape
<p>which wire of the buzzer is positive?</p>

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