Ir Control - Maker Factory ELECTRONICS EXPERIMENTS BOX Manual

2.90 IR control

Circuit 193: Simple IR transmitter
Setup information
Install the diode, the resistor and the electrolytic capacitor as shown in Fig. 2.193 followed by the jumper
wire. Check the placement on the board again and only then connect the battery.
Experiment
You can connect an mp3 player or the speaker output of a portable radio to the input. Build the circuit
described below to test the circuit. Now you have got an IR transmitter and an IR receiver for the transmis-
sion of LF signals.
The circuit diagram for this experiment is shown in Chap. 3, Fig. 3.193.
218
Components required:
1 x IR diode,
1 x 4.7 kΩ resistor,
1 x 10 μF electro-
lytic capacitor,
1 x breadboard, 1 x 9V
battery with clip con-
nector
Fig. 2.193: Simple IR trans-
mitter