Ir Based Audio Transmitter

Now you can transmit the sound signal via IR,Made it with a few components

Component List:-

1) Laser diode (you can take it from a simple laser torch without removing lens)
2) Transistor 2N3904 or equivalent
3) Transistor 2N3906 or equivalent
4) Transistor 2N2222 or equivalent
5) Transistor BPW 17N or (can use  LDR, but it will effect on the light)
6) Resistance 10K ohms- 4 pieces
7) Capacitor 0.1 Mf- 2pieces
8) Speaker