sciBot Digital Switch

The yellow RCA jack has an outer shield that is connected to ground, and a centre pin that is connected to the sciBot’s analog or digital inputs.

Materials

Image	Quantity	Description	Manufacturer	Vendor
	1/6	Audio Video Cable with RCA Plugs (0.9 m)	Chateau 777-36G	Dollar Tree
	1	Tact switch	CIT Relay and Switch CR1102H4.3F260	DigiKey 2449-CR1102H4.3F260CT-ND
	1	1/4″ (6.3 mm) 3:1 adhesive heat shrink, cut to 40 mm	Qualtek Q5-3X-1/4-01-QB48IN-25	DigiKey Q53X014B-ND
	2	1/8″ (3.2 mm) 3:1 heat shrink, cut to 10 mm	Qualtek Q2-F3X-1/8-01-QB48IN-25	DigiKey Q2F3X018B-ND

If you want a different switch, you can try any of the following:

Step 1
Cut the legs of the switch so that there are about 5 mm of each leg remaining.
Step 2
Tin the legs.
Step 3
On the audio video cable, identify the two strain reliefs. They are black blocks of plastic that prevent the wires from being pulled apart. One of the strain reliefs is visible in the bottom-left corner of the picture to the right.
Step 4
Remove the strain reliefs using shear cutters.
Step 5
Pull the yellow cable to separate it from the red and white cables.
Step 6
Cut the yellow cable in half.
Step 7
Put the large piece of adhesive heat shrink on the cable.
Step 8
Remove about 20 mm of insulation from the cable.
Step 9
Strip about 3 mm of insulation from the inner yellow and black wires.
Step 10
Tin the exposed copper.
Step 11
Put a piece of small heat shrink over each wire.
Step 12
Solder one wire to each leg of the tact switch.
Step 13
Put the small pieces of heat shrink over the solder joints and heat.
Step 14
Put the large heat shrink over the entire joint and heat. Congratulations! You have completed making the sciBot Digital Switch.