I needed a foot switch for my DSLR camera so that I could take hands-free pictures. On a long-shot, I went down to the local Radioshack to see if they had one. As expected, they didn't have any camera foot switches, but I did luck out that they had all the parts necessary to build my own. Here is how to throw together a 5-minute camera foot switch with easily obtainable parts from Radioshack.
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You will need:
(x1) 3/32" Mono Plug (part # 274-0289)
(x1) Sustain Foot Pedal (part # 42-4053)
(x1) 20' Stereo 1/4" female to 1/8" male Cable (part # 42-2561)











































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Parts:
Hosa Stereo Breakout 3.5 mm TRS to Dual 1/2 in TSF - Mode YMP-137
On-Stage Gear KSP20 Keyboard Sustain Pedal
3.5 (f) mm to 2.5 (m) mm barrel adapter from Radio Shack - sorry no model number.
The Sustain Pedal mono phone (m) plugs goes into the black mono leg (f) of the Hosa splitter. This side is labeled 'Tip' on the Hosa.
Sustain cable to Hosa Tip leg, Hosa 3.5 into barrel plug, 2.5 into t2i
t2i on Manual.
Set t2i timer to 2 seconds.
Step on pedal, t2i auto focuses then takes photo. This is the same behavior you get if you use the Canon infra-red remote or the Canon wired remote.
Setting the timer on the Canon is required to make this work - same as Canon controllers.
Thanks for the original info. All parts from Amazon except RShack barrel adapter.
6 Foot 2.5mm Stereo Male Plug to 3.5mm Stereo Female Jack
http://www.pchcables.com/6fo2stmaplto.html
Hosa Tech Stereo Breakout 3.5 mm TRS to Dual 1/4 in TSF
http://www.pchcables.com/ymp-137-bulk.html
M-Audio SP-1 Sustain Pedal
(important that you can set polarity for any pedal you are considering)
http://www.guitarcenter.com/M-Audio-SP-1-Sustain-Pedal-102952298-i1154552.gc
the key here is the hosa tech piece which turns a stereo 3.5mm plug into two 1/4 mono plugs. one will be shutter the other if you wish can be hooked into a second pedal for autofocus (i dont need this). a schematic for the resoning behind this can be found here:
http://www.mariasphoto.com/wp-content/uploads/2007/03/canon-diy-shutter-release.jpg
hope this helps someone
The thing that surprises me though is the interest in this; I can't remember ever wanting to take a photo with my foot. What are the typical uses for this?
I've been setting up a white backdrop with a couple of soft boxes at parties that I've been going to lately and running a "photo booth" for everybody at the party. The pics have turned out awesome, its a really fun way to get killer pics of your friends. I've been trying to figure out how to make the entire experience more natural, especially for peeps that dont like their pics taken.
--Enter Foot Pedal---
By having a foot pedal where you pose, you can take as many pics as you want, and with somebody standing there "supervising", the pictures energy and fun increase 100 times. This way people get quite a bit more crazy because I setup all the goods, put in an empty 16gb card, and the everybody else just lets it rip. I come back at the end of the night, pack up, and upload all the pics to my server and then everybody can download them. Its pretty hilarious, I would recommend to all.
Why take pictures with my feet? After making 135 Instructables, I found that it is useful to have both hands free to actually make things, rather than have one tied up taking pictures. Using a camera timer is unreliable, slow and annoying. A foot switch allows me to keep the flow of what I am doing.
I really like this idea for enabling simple autophotography; most of the time when I have both hands occupied and need to take a photo I call my son into help.
By the way you may have sold yourself short saying "135 Instructables" your tag image says 150! Either way 135 or 150 it is an amazing contribution, congratulations.
Nice choice in DSLR brand, too. Pentax glass is second to none. ;-)
My Sony A230 uses a wireless remote shutter and doesn't has any place to connect any kind of remote switch :/
My guess is that Nikon doesn't sell these "custom" plugs seperately on the market. I'm not sure if the wiring is the same. I haven't dared to cut it open (yet).
You can find some a discussion about this in the Ible of deth2all.
Thanks.
http://www.amazon.com/Remote-Shutter-Release-Digital-Cameras/dp/B001G9WAF2
Then cut the cord and put appropriate plugs on each end so the foot switch can be substituted for the button.
This sustain foot pedal, where is it normally used for or is it a "general" item?