buy a cheap ready-made remote control (no DIY, no soldering)

Paco

Re: buy a cheap ready-made remote control (no DIY, no soldering)

« Reply #30 on: 19 / July / 2015, 15:01:27 »

Advertisements

Quote from: waterwingz on 17 / July / 2015, 22:42:09

The thing to realize here is that typically 3V is not enough to trigger the 5V input level detect on most Canon cameras. But on some I believe it will. So the question becomes one of threshold tolerances. If the voltage from two new AA cells is giving you enough voltage that the camera thinks there is power being applied to the USB connector +5V pin then try a set of older rechargable NiCad batteries. You won't get much more than 1.2 volts from each of them and that should be enough so that CHDK thinks the remote is "off".

OK, I put in one completely spent NiMH and one charged one. I now get 1.26V on each switch setting. Even then, plugging in the USB cable triggers the camera.

BTW is it normal that the remote function only works when the camera is NOT in CHDK mode?

Amazingly I was able to open the case without breaking it by gently pulling both halves apart. It has a nice clean little SMD board. Even the switch is mounted to the board so I can't alter the wiring. The two DATA lines are tied together but I don't think this affects anything other than cameras with built-in chargers. There were complaints about this on Amazon.

small-2.jpg (673.53 kB, 1586x1515 - viewed 54 times.)

small-1.jpg (597.45 kB, 1431x1413 - viewed 65 times.)
Software Used:Adobe Photoshop CC 2014 (Macintosh) Exposure Time:1/40 seconds F Number:F/2.4 ISO Speed:64 Metering Mode:Pattern Flash Mode:Flash did not fire; compulsory flash mode Focal Length:4.28 mm Color Space:sRGB

Logged

waterwingz

12110

Re: buy a cheap ready-made remote control (no DIY, no soldering)

« Reply #31 on: 19 / July / 2015, 15:37:00 »

Quote from: Paco on 19 / July / 2015, 15:01:27

OK, I put in one completely spent NiMH and one charged one. I now get 1.26V on each switch setting.

So when you put the switch in the 'on' position, there is not enough voltage there to activate the boost regulator and all you are getting is the leakage voltage again?

Quote

Even then, plugging in the USB cable triggers the camera.

That seems very strange - most of the reports I have seen indicate needing to be quite a bit above 3V to trigger the camera via CHDK USB remote operation.

Quote

BTW is it normal that the remote function only works when the camera is NOT in CHDK mode?

Yes. The whole purpose of the USB remote is to let you shoot without having to physically touch the shutter button. Sort of like a cable release on the old film cameras. That the "built-in" functionality is only active when using the camera normally ( i.e. not in CHDK mode). However, when you are running a script (and thus in CHDK mode) the script can interact with the remote to control script action.

Logged

Ported : A1200 SD940 G10 Powershot N G16

Paco

Re: buy a cheap ready-made remote control (no DIY, no soldering)

« Reply #32 on: 19 / July / 2015, 15:45:44 »

Quote from: waterwingz on 19 / July / 2015, 15:37:00

So when you put the switch in the 'on' position, there is not enough voltage there to activate the boost regulator and all you are getting is the leakage voltage again?

It appears that way.

Quote

That seems very strange - most of the reports I have seen indicate needing to be quite a bit above 3V to trigger the camera via CHDK USB remote operation.

Great. I do have more of the same camera. I could try other ones.

Quote

The whole purpose of the USB remote is to let you shoot without having to physically touch the shutter button. Sort of like a cable release on the old film cameras. That the "built-in" functionality is only active when using the camera normally ( i.e. not in CHDK mode). However, when you are running a script (and thus in CHDK mode) the script can interact with the remote to control script action.

I would like to be able start a script remotely.

Logged