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Remote Triggers

Safwaan
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So I am not sure if anyone is going to be able to help here but ill give it a go: 

 

I use a remote trigger for my Canon EOS 800D and I opened it up to find a motherboard (I think) and the wire for the AUX (3.5mm Headphone jack) to plug into the camera. How does they do they get the code onto the motherboard and is there any way I would be able to see the code on the motherboard? I would also like to view the code on the motherboard to code my own similar device. My thinking is that if I was to code a similar program and run it off a phone or tablet with a proper User Interface it would be a fun project to try and do. I have tried looking this up however it seems this isn't a very common topic lol. 

 

Below are the images of the motherboard if it helps in any way? 

front .jpg

back .jpg

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You could try to analyze the bluetooth signal. I guess that's easier than to reverse engineer the chip...

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2 hours ago, Korben said:

You could try to analyze the bluetooth signal. I guess that's easier than to reverse engineer the chip...

The remote itself is not bluetooth (i don't think anyway) as it plugs directly into the camera via a 'headphone' jack 

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7 minutes ago, Safwaan said:

The remote itself is not bluetooth (i don't think anyway) as it plugs directly into the camera via a 'headphone' jack 

Ah I see. Sorry. I just googled and found an App, but it says for the EOS 800D remote triggering only works with the BR-E1, which is a bluetooth device. ;)

 

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2 hours ago, Korben said:

Ah I see. Sorry. I just googled and found an App, but it says for the EOS 800D remote triggering only works with the BR-E1, which is a bluetooth device. ;)

 

Ahh fair enough, no this is a cabled one - i am not sure why they say onkly bluetooth works because i know for a fact that is not the case. 

 

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there is going to be a main chip looks like on the backside of the LCD, it is covered in black stuff.

that is most likely the SOC with some ROM on it, it should just be sending out a pulse to tell the camera to take a picture. that should be easy enough to check for

Good luck, Have fun, Build PC, and have a last gen console for use once a year. I should answer most of the time between 9 to 3 PST

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On 7/4/2020 at 6:22 PM, GDRRiley said:

there is going to be a main chip looks like on the backside of the LCD, it is covered in black stuff.

that is most likely the SOC with some ROM on it, it should just be sending out a pulse to tell the camera to take a picture. that should be easy enough to check for

So im guessing the delay and timer on the remote is just simply a delayed pulse? 

How can I check for this (if you know how)? 

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1 hour ago, Safwaan said:

So im guessing the delay and timer on the remote is just simply a delayed pulse? 

How can I check for this (if you know how)? 

I'd just set it to do it, and then read the signal off the end connector.

Good luck, Have fun, Build PC, and have a last gen console for use once a year. I should answer most of the time between 9 to 3 PST

NightHawk 3.0: R7 5700x @, B550A vision D, H105, 2x32gb Oloy 3600, Sapphire RX 6700XT  Nitro+, Corsair RM750X, 500 gb 850 evo, 2tb rocket and 5tb Toshiba x300, 2x 6TB WD Black W10 all in a 750D airflow.
GF PC: (nighthawk 2.0): R7 2700x, B450m vision D, 4x8gb Geli 2933, Strix GTX970, CX650M RGB, Obsidian 350D

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Spirt  (NAS) ASUS Z9PR-D12, 2x E5 2620V2, 8x4gb, 24 3tb HDD. F80 800gb cache, trueNAS, 2x12disk raid Z3 stripped

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"Stupidity is like trying to find a limit of a constant. You are never truly smart in something, just less stupid."

Camera Gear: X-S10, 16-80 F4, 60D, 24-105 F4, 50mm F1.4, Helios44-m, 2 Cos-11D lavs

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On 7/5/2020 at 10:02 PM, GDRRiley said:

I'd just set it to do it, and then read the signal off the end connector.

Right so its been a while and I think I have figured out a new (much easier way of doing it) 

 

It turns out canon allow developers to download specific drivers and software (SDK's) which allow programs to communicate with the camera and control function. This means that all I need to do is code a fairly simple program maybe with a nice interface and use the SDK. This s ould be much easier than trying to code a motherboard :)

 

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Yeah you can code and use the USB port 

Good luck, Have fun, Build PC, and have a last gen console for use once a year. I should answer most of the time between 9 to 3 PST

NightHawk 3.0: R7 5700x @, B550A vision D, H105, 2x32gb Oloy 3600, Sapphire RX 6700XT  Nitro+, Corsair RM750X, 500 gb 850 evo, 2tb rocket and 5tb Toshiba x300, 2x 6TB WD Black W10 all in a 750D airflow.
GF PC: (nighthawk 2.0): R7 2700x, B450m vision D, 4x8gb Geli 2933, Strix GTX970, CX650M RGB, Obsidian 350D

Skunkworks: R5 3500U, 16gb, 500gb Adata XPG 6000 lite, Vega 8. HP probook G455R G6 Ubuntu 20. LTS

Condor (MC server): 6600K, z170m plus, 16gb corsair vengeance LPX, samsung 750 evo, EVGA BR 450.

Spirt  (NAS) ASUS Z9PR-D12, 2x E5 2620V2, 8x4gb, 24 3tb HDD. F80 800gb cache, trueNAS, 2x12disk raid Z3 stripped

PSU Tier List      Motherboard Tier List     SSD Tier List     How to get PC parts cheap    HP probook 445R G6 review

 

"Stupidity is like trying to find a limit of a constant. You are never truly smart in something, just less stupid."

Camera Gear: X-S10, 16-80 F4, 60D, 24-105 F4, 50mm F1.4, Helios44-m, 2 Cos-11D lavs

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All the remote does is short out the pins. See this video, or google canon remote shutter diy

 

 

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On 7/13/2020 at 9:38 AM, Selle said:

All the remote does is short out the pins. See this video, or google canon remote shutter diy

 

 

ooh thanks that's quite interesting!!

 

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Posted
On 7/4/2020 at 4:00 AM, Safwaan said:

I use a remote trigger for my Canon EOS 800D and I opened it up to find a motherboard (I think) and the wire for the AUX (3.5mm Headphone jack) to plug into the camera. How does they do they get the code onto the motherboard and is there any way I would be able to see the code on the motherboard? I would also like to view the code on the motherboard to code my own similar device. My thinking is that if I was to code a similar program and run it off a phone or tablet with a proper User Interface it would be a fun project to try and do. I have tried looking this up however it seems this isn't a very common topic lol. 

 

Below are the images of the motherboard if it helps in any way?

Spoiler

back .jpg

 

I'd bet you almost anything that under the red and yellow wires it says JTAG, which would be the programming interface. The factory probably has a jig they drop this board into and programs the chip over JTAG. If you hooked up a JTAG adapter, you might be able to read some information from that port, but I doubt you'd be able to get the firmware off the chip, it usually doesn't work like that.

 

As others have said, the camera triggers are really simple and work by pulling some of the pins low, or shorting them together (I haven't looked into Canon's trigger system) so you could replicate that with an Arduino and maybe 10 lines of code.

ASU

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