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Step 2Build the Timer Circuit
We will be configuring the timer in astable mode the relavant schematic is on page 9 of the NE555 datasheet from Texas Instruments, available at: http://www.ortodoxism.ro/datasheets/texasinstruments/ne555.pdf
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.
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.
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