Don't like your little brother's TV channel selection? Hate the volume your wife sets the stereo at? Want to just annoy someone? This circuit does all that and more by jamming most IR remote signals. The circuit releases a flood of pulsing IR light that confuses the reciever by corrupting the data stream.
Schematic-
Parts List-
R1 - 1 - 100K 1/4W Resistor
R2 - 1 - 150K 1/4W Resistor
R3 - 1 - 10K 1/4W Resistor
R4 - 1 - 1K 1/4W Resistor
R5 - 1 - 22 Ohm 1/4W Resistor See "Notes"
C1 - 1 - 10nF Ceramic Disc Capacitor
C2 - 1 - 1uF Electrolytic Capacitor
D1, D2, D3 - 3 - High Output IR LED
Q1 - 1 - 2N4403 PNP Transistor
Q2 - 1 - 2N4401 NPN Transistor
S1 - 1 - Normally Open Momentary Push Botton
B1 - 1 - 4.5V Battery (Three "AA"'s In Series)
MISC - 1 - Wire, Case, Board
Notes-
1) You may need to adjust the value of R3 for the right frequency. A pot can be used.
2) You may only need one IR LED.
3) It goes without saying that this circuit should be used with descretion.
4) The value of R5 depends on your supply voltage and LED. For a standard 4.5V supply and standard IR LED, use 22 Ohm as specified on the parts list. This forum topic covers this resistor as well as a few other issues with the circuit.
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