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Step 4Hack The Camera Part II (Solder a Ground Connection)
You just completed the hardest part of this hack - congratulations! That said, you've got one more (easier) solder joint to make. This one you'll need some fresh solder for.
NOTE: Please ignore that in this picture, the circuit board is inside of the plastic front case. Don't do what it looks like I'm doing here - please solder this connection BEFORE putting the circuit back in its case, to avoid accidentally melting the plastic case. (I was simply sloppy in photographing this step and will try to fix it later.)
Take a fifth piece of wire, and cut it to at least a foot in length with edges stripped. Ideally, this piece of wire should be colored black, or at least differently from the first four. Now, solder one end of it to the outer side of the ground end of the battery holder, as shown. You'll need to add your own solder to this connection and solder directly onto the metal here. I've found this to be much easier than attempting to add your wire to the existing solder holding the battery holder to the circuit board. (I'll point out the right and wrong ways in the photos.)
Why are we doing this? Well, for an Arduino-controlled transistor to be able to control the switches on the keychain camera, the Arduino circuit and the keychain camera circuit need to share a common electrical ground. This wire simply lets you physically connect the camera's ground to the Arduino's ground later, via a common row on the breadboard.
NOTE: Please ignore that in this picture, the circuit board is inside of the plastic front case. Don't do what it looks like I'm doing here - please solder this connection BEFORE putting the circuit back in its case, to avoid accidentally melting the plastic case. (I was simply sloppy in photographing this step and will try to fix it later.)
Take a fifth piece of wire, and cut it to at least a foot in length with edges stripped. Ideally, this piece of wire should be colored black, or at least differently from the first four. Now, solder one end of it to the outer side of the ground end of the battery holder, as shown. You'll need to add your own solder to this connection and solder directly onto the metal here. I've found this to be much easier than attempting to add your wire to the existing solder holding the battery holder to the circuit board. (I'll point out the right and wrong ways in the photos.)
Why are we doing this? Well, for an Arduino-controlled transistor to be able to control the switches on the keychain camera, the Arduino circuit and the keychain camera circuit need to share a common electrical ground. This wire simply lets you physically connect the camera's ground to the Arduino's ground later, via a common row on the breadboard.
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