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Step 1: Gather the Materials
1 555 Timer IC
1 5V Relay
3 IR LED's
1 0.1uF Capacitor
1 220uF Capacitor
1 10K Resistor
1 100K Potentiometer
Step 2: Build the Timer Circuit
Ra = 100K pot
Rb = 10K res
C = 220uF cap
Note that pin 4 may be left unconnected and I have replaced the 0.01uF capacitor in the schematic with a 0.1uF, either will work.
The first thing to do is clip off the leads we wont be using, in this case pins 4 and 5 should be removed. Next bend pin 2 under the bottom of the timer, this will be connected to pin 6. Flatten the remaining leads using a small pair of plyers.
Now that the IC is prepared the components can be added. It is important to keep the layout as flat as possible since this will be mounted on the bill of the hat.
Once all the components are added solder wires for gnd to pin 1, power to pin 8 and the timer output to pin 3.
Step 3: Attach the Relay
Connect the output of the 555 to the + side of the coil and connect the coil gnd to pin 1 of the 555. Next add wires to the two pins you just itdentified as the NO contacts.
Step 4: Modify the Tv-B-Gone
Step 5: Attach the Circuitry to the Hat
Step 6: Use It
To test out your creation use a cell phone with a camera, put the cell phone into picture taking mode and point it at an IR LED then hit the push button on the Tv-B-Gone. You should be able to observe the LED blinking on the screen of the cell phone.
Once your sure it works you should spend some time aiming the LEDs properly so that they turn off tvs you are looking at and they dont get shielded by the bill of the hat.