Daniel Reetz, the founder of the DIY Book Scanner community, has recently started making videos of prototyping and shop tips. If you are tinkering with a book scanner (or any other project) in your home shop, these tips will come in handy. https://www.youtube.com/channel/UCn0gq8 ... g_8K1nfInQ

Powershot A3300 AC adapter and Usb-trigger

Everything camera related. Includes triggers, batteries, power supplies, flatbeds and sheet-feeding scanners, too.
bimbo111
Posts: 46
Joined: 11 Aug 2012, 12:12
E-book readers owned: iPad
Number of books owned: 0
Country: Denmark

Re: Powershot A3300 AC adapter and Usb-trigger

Post by bimbo111 » 23 Jan 2013, 11:25

Thank you mark i might look into that later on, but so far i'm still hoping to avoid going deeper into the CHDK.

Breakthrough in the AC-adapter department! I managed to power one of the A3300 from a standard ATX power supply. Here's a picture i took in this manner:

Image

Here you can see the setup:

Image

I used this picture as a reference:

Image

I connected number 13 and 14 to turn on the powersupply (black and white on the picture below). The wire colors are different from the pinout above due to the extension cable i've used, so i didn't have to cut up the original cables of the supply.

Image

I could then measure the voltage between 1 and 3 and got a bit worried, when i got 3,2 volts instead of the expected 3,3v. The A3300's battery is 3,6v.
Anyway it turned out to work anyway.

I've sawed a wooden square at the same size as the battery and and placed in conductors as you can see here:

Image

I've drilled to the conductors in two rounds. First a bigger hole in the end and then a smaller one the whole way through:

Image

This way when i put solder on the end with the bigger hole it can't get through the smaller hole and stays put and in contact with the conductor of the camera. I've tried to make a sketch of this:

Image

I need to make this setup more stable and connect the other camera, but i'll wait with this until i've painted my scanner.
Hope anyone can benefit from this!

User avatar
Gerard
Posts: 154
Joined: 17 Oct 2010, 07:15
Number of books owned: 0
Location: Berlin (Germany)

Re: Powershot A3300 AC adapter and Usb-trigger

Post by Gerard » 10 Feb 2013, 01:10

i am also powering my canon a495 from an atx powersuppy, but sometimes i had an "bat low" problem on the cameras, it helped to use a thicker wire and near the camera a capacitor

bye gerard

User avatar
daniel_reetz
Posts: 2797
Joined: 03 Jun 2009, 13:56
E-book readers owned: Used to have a PRS-500
Number of books owned: 600
Country: United States
Contact:

Re: Powershot A3300 AC adapter and Usb-trigger

Post by daniel_reetz » 10 Feb 2013, 17:45

Gerard wrote:i am also powering my canon a495 from an atx powersuppy, but sometimes i had an "bat low" problem on the cameras, it helped to use a thicker wire and near the camera a capacitor

bye gerard
Gerard, how was your capacitor connected?

User avatar
Gerard
Posts: 154
Joined: 17 Oct 2010, 07:15
Number of books owned: 0
Location: Berlin (Germany)

Re: Powershot A3300 AC adapter and Usb-trigger

Post by Gerard » 12 Feb 2013, 14:56

i've remove the isolation (without cutting the copper core) and add a screw terminal with the capacitor (soldering would be better)

they should be labeled for >=4V

and watch the polarity :) ->
http://www.youtube.com/watch?v=rr7bPmGTQUk

the capacitor should be near the camera, or in the battery dummy
Attachments
DSC00271.jpg

User avatar
daniel_reetz
Posts: 2797
Joined: 03 Jun 2009, 13:56
E-book readers owned: Used to have a PRS-500
Number of books owned: 600
Country: United States
Contact:

Re: Powershot A3300 AC adapter and Usb-trigger

Post by daniel_reetz » 16 Feb 2013, 12:54

excellent, thank you! I have another project with MANY cameras that have this same problem, I think a cap is the answer. Nice use of terminals!

Post Reply