Print PDF
Favorite
Email
Step 3Looking for suitable pins
In the open camera try to identify the pins that are necessary to switch the device on and off and for focus and release.
From the position of the buttons on the case you already know where these buttons are, but not which pins are really used for a specific action.
In the third picture you see the release-button of my camera, and five pins which are connected to the PCB.
I used a digital multimeter to find out which two pins are connected when the button is pressed. When pressed the resistance between these two pins changes dramatically from >100kOhm to a value near zero.
If pin one and three are connected the camera focuses and if pin two is additionally connected to them the shutter is released. So we need three small copper wires to get this functionality to the outside.
I also figured out which pins of the on/off switch are necessary and tied them also on the pinhead.
It is good to make a small note on this because after a few days you won't remember which one on the pinhead is which...
From the position of the buttons on the case you already know where these buttons are, but not which pins are really used for a specific action.
In the third picture you see the release-button of my camera, and five pins which are connected to the PCB.
I used a digital multimeter to find out which two pins are connected when the button is pressed. When pressed the resistance between these two pins changes dramatically from >100kOhm to a value near zero.
If pin one and three are connected the camera focuses and if pin two is additionally connected to them the shutter is released. So we need three small copper wires to get this functionality to the outside.
I also figured out which pins of the on/off switch are necessary and tied them also on the pinhead.
It is good to make a small note on this because after a few days you won't remember which one on the pinhead is which...
| « Previous Step | Download PDFView All Steps | Next Step » |
 |
Add Comment
|
