I'm sure I had this info once, but cannot find it now.

What component is used for the temperature sensor in the Mk2a, and where is it located?

My recently stopped working, and I want to check the contacts and whatnot.

Thanks

FAQ you!

It's a SO-8W dallas DS1821S, ISTR it's somewhere just behind the RAM chips - quite a wide chip

Thanks!

I noticed recently that mine started reading zero as well.

Maybe it's just a bug in Hijack and our sensors are fine?

Or perhaps it's related to our button mod?

No, not the button mod (unless my player guessed what was coming..).

My Mk2a was reading zeros the night before I opened it up for the button mods.

Cheers

I wonder if any of the insiders on the BBS might have an idea of a soldering-iron fix for this non-problem?

??

An you're absolutely certain this isn't a new bug in Hijack?

Who else has a recent build of Hijack and can check their temp sensor?

Latest version of Hijack and I have funtional temp sensor.
+39 degrees C

Latest version of Hijack and I have funtional temp sensor.
+39 degrees C

Same here, except it's 37 degrees C

/Michael

Uhh.. I have several units here other than the one with the faulty sensor..

The sensor doesn't go faulty, as such, it just seems to go into thermostat mode. There's no way of switching it back to thermometer mode without lifting pins and doing strange stuff with it. You can replace the chip, but the new one is just as likely to do the one-way thing into thermostat mode.

I don't particularly like the chip for that reason...

Hugo

Sounds ugly.

But I am into pin-lifting these days, if you want to tell more..

Cheers

Never mind, I just pulled down the datasheet. UG-LY.

A fellow practically has to build a box just to reprogram it back to the non-thermistat mode. Sheesh.

The datasheet warns that starting a new "write" while a prior one is still active might cause internal corruption, which could make it flip to thermostat mode.

Does the code ever "write" any of the internal EEPROM registers?

Cheers

No, we don't. Well, we used to write the damn config register, otherwise it wouldn't start conversions even with a lot of poking. I have no idea why we didn't just use an LM77, I really don't. Maybe we couldn't get samples at the time.

Hugo