40khz (IR) Infrared Tester

Use this circuit to test if the light source coming from your 40khz IR emitter is actually giving out the best frequency. The schematic says to apply a GP1U5X ir module, however probably any 40khz detector module will work.

Part list

R1 270 ohm resistor
L1 Visible LED
S1 On/Off Switch
IR Module Sharp GP1U5X IR Detect Module (or compatible)