ESR meter upgrades

[Per Hansson]

Re: ESR meter upgrades

I have uploaded the firmware from one on eevblog.
Yes it has a menu where you can select the basic modes of operation, including only ESR.
If anything's missing just compile your own

[Dutch52]

Re: ESR meter upgrades

@STJ,
Did you investigate the AY-AT firmware further? (See message 928)

[stj]

Re: ESR meter upgrades

no.
and that machine is sketchy as fuck - i think a harddrive is failing.

[vinceroger69]

Re: ESR meter upgrades

Hi i was going to arder AY-AT tester with case but seen a post where it says this one maybe a better choice and is newer https://www.aliexpress.com/item/M644...ceBeautifyAB=0
can this tester be upgraded with later firmware etc if needed and has anyone found a case too fit them thanks

[stj]

Re: ESR meter upgrades

ask here:
http://www.eevblog.com/forum/testgear/$20-lcr-esr-transistor-checker-project/5025/

it looks o.k. but a colour display would have been better.

[vinceroger69]

Re: ESR meter upgrades

ask here:
http://www.eevblog.com/forum/testgear/$20-lcr-esr-transistor-checker-project/5025/

it looks o.k. but a colour display would have been better.

Yes true no colour screen on these, so a ay-at it is then as aliexpress has a sale on and these can come with a case etc, too save me reading loads of pages in the eevblog thread lol, do you know what if any parts are recommend to swop out? before i update the firmware, i will also keep too a 9v battery as fits in case nice.

[stj]

Re: ESR meter upgrades

only the voltage reference really, like last time - i think you have spares of the lm4040

beware of the case, if it's the acrylic ones they crack.

[stj]

Re: ESR meter upgrades

btw, i ordered one of these in the sale.
https://www.aliexpress.com/item/New-...814430302.html

i'm thinking with a mask on the end to reduce the aperature, i can check how hot chips are without using the "finger test"

[vinceroger69]

Re: ESR meter upgrades

btw, i ordered one of these in the sale.
https://www.aliexpress.com/item/New-...814430302.html

i'm thinking with a mask on the end to reduce the aperature, i can check how hot chips are without using the "finger test"

yes got spares of the lm4040 so thats ok what crystal does the ay-at come with is it worth upgrading? and yes that looks like a good ir thermometer i will have a good look through there site whilst the sales on, i was going too make a post asking if anyone had spotted anygood bargains etc we all like too build our test equipment/parts stock up.

[stj]

Re: ESR meter upgrades

upgrade to a 16MHz crystal too.

[Per Hansson]

Re: ESR meter upgrades

GM328R firmware attached containing latest SVN version 798 of Karl-Heinz firmware.
This time 16Mhz and 20Mhz builds are included, I have tested both.

[Dutch52]

Re: ESR meter upgrades

@STJ

Is your old machine still sketchy ?

[stj]

Re: ESR meter upgrades

worse,
drive is dead
i know why - the motor driver ic is shorted (ST smooth series) - i'm looking for a donor drive to get another chip.

[stj]

component testers

just did a fresh build
not tested yet.


GM328 - every option on, low bat @7.2v

AY-AT no BJT / PUT testing - i tried real hard but there is simply not enough flash.

[sam_sam_sam]

Re: component testers

Are you going to show any pictures of the unit that you are building

[stj]

Re: component testers

i did, nothing has been added since.

the way i see it, there is no point building one if it costs over twice as much in parts as buying one from china and upgrading the crystal.

i will buy a new one when i see one with an atmega664 or 1284 and a colour display that i like.
i wont buy or recomend any atmega328 based stuff now, they just dont have enough memory for all the features.

[eccerr0r]

Re: component testers

Anyone have a PUT or UJT to play with on these testers?
SCS?

I suppose DIACs are more available but testing such on these things are going to be tough?

[stj]

Re: component testers

maybe a diac works - i dont have one to try.
not even seen one for decades.

in theory it may be detected as 2 diodes.

[eccerr0r]

Re: component testers

I have a few UJTs in my junk pile, but not PUTs or SCSs. Yeah probably should show up as two diodes or something to that extent. (Incidentally, how could SCS be tested? has more than 3 pins...)

DIACs I have a couple and they're still being made/used, but I don't think they could be properly tested. They might detect as a funky high ohm resistor or something? Not sure. I don't have one of these testers to try.

[stj]

Re: component testers

a diac would probably show as a pair of zeners.
i think i may have one on an old switching psu for halogen lamps - maybe i will be able to test that theory.