IR remote control
You can Do It Yourself: A 5-channel IR remote control system (transmitter & receiver). The system uses the RC5 transmitting protocol which is probably the most used by hobbyists. The remote control transmitter is based on a PIC12F617 microcontroller and the receiver is based on the popular PIC16F84A.
Stereo VU meter
This is a stereo volume unit (VU) meter for audio equipment. You will love it because besides being useful it also looks great! The circuit senses audio levels and drives 20 LEDs on 2 bar-graphs, providing a 2 -channel (stereo) logarithmic 3 dB/step analog display. The circuit has high input inpedance and it is able to accept any signal level.
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