JJC Intervalometer

Jalad said:
Well the third unit which never worked properly to start with (would only work sitting upright, seemed to be a bad connection somewhere?) now won't work at all.

I took it and the original JJC TM-D I had fail to a camera shop in Glasgow today and tested them both on a G1 in the shop - neither worked.

So it seems it is the JJC TM-D's and not my camera, at least (although I couldn't find a camera shop that had any sort of remote shutter for Panasonic, so I couldn't 100% rule out a dodgy port on my camera)

I'm pulling my hair out with this, I'll have to look at finding a decent intervalometer that is signal compatible and try putting a 4-pin connector on it..
Click to expand...

I wonder if it's your jack... Mine seems to work fine so far.
 
They don't work on a G1 in a camera store though? Unless my camera is somehow destroying the intervalometers, don't really see how though.
 
I have found mine REALLY needs to be pushed in tight. Often I fail to get that last 1/16th of an inch in there because I'm not used to having to put so much pressure on the jack. (That's what she said... ha! I beat you'all to it!)
 
Nice... mine doesn't seem to be that way. I haven't used the jack much though so maybe it isn't broken in. I will be shooting a ton over the next month. I will let you know if it breaks down (hopefully not)!
 
This is true, but I've used the JJC successfully for nearly a year until all these problems started. I'm certain it's plugged in properly.
 
Mojo, I bought a pair of the JJC TM-D intervalometers less than a year ago, and they both failed on me the same night on the north rim of the Grand Canyon. I was understanably annoyed. Have since purchased two more, and now I'm scrupulously following the on/off instructions for both camera and intervalometer (which I wasn't doing prior to the failures). The active electronics in the JJC units may not be able to withstand repeated exposure to momentary short circuits or spurious spikes brought on by plugging them in and out while they're turned on. So far, so good.

These days, if the shoot is vital enough to me, I carry spares. Painful lesson learned.
 
Thanks for the heads up... so you are just making sure that the intervalometer is turned off before the camera?
 
The Gh1 needs to see a resistance of ~41Kohms between pins three and four (the rearward ring and the sleeve) in order for the camera to recognize the remote controller. To fire the shutter, the resistance has to drop to ~2Kohms. There is an active circuit in the JJC to make the impedance switch happen, and i suspect that THAT is the achilles heel in the remote unit. Havn't cracked open one of the failed units yet, but it's on my rainyday list. I'll report back what i find if/when i do.

For me, the order of activation now is:
1 Camera and intervalometer off.
2 Plug intervalometer securely into GH1 mic jack.
3 Intervalometer on.
4 Camera on.

So far, no problems. Fingers crossed...
 
I'd add that switching off both the camera and JJC unit before pulling the plug is another habit i've gotten into, although the order of offing them shouldn't matter.
 
I've noticed two new Panasonic intervalometers show up on ebay that I haven't seen anywhere before. There's the JYC MC-C1: http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=170502831399

I suspect this probably uses the same circuit internally as it seems to have exactly the same features, right down to the 0-399 exposures.

The Pixel TC-252 seems to be different - it has a range of 0-9999 exposures: http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=110505992480

I'll be ordering the Pixel TC-252 shortly - will report my findings!
 
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