ESR meter upgrades

[lotec25]

Re: ESR meter upgrades

So witch meter is best to buy at this time? I seen this one recommended a page back

https://www.aliexpress.com/item/32832292103.html

Is there a post that states what items are needed to mod it to where it can be used with the new firmware that has been written?

Thanks

[brethin]

Re: ESR meter upgrades

Has anyone ever tried the GME model 236 sold by TEquipment.NET ? Does it test in circuit like it claims?

Nothing can test in circuit accurately due to other components effecting it.

[ducky29]

Re: ESR meter upgrades

Has anyone ever tried the GME model 236 sold by TEquipment.NET ? Does it test in circuit like it claims?

[redwire]

Re: component testers

I reprogrammed AY-AT/ST7735 20MHz xtal and it seems to work fine. I have to play around with it more. It's a small font.

ARVDUDE does not work with Atmel AVRISP MkII, it's a years old bug, something about the USB driver. Wasted hours going down that rabbit hole. In the end, I had to have Zadig rollback to its old Win7 USB driver to get it to work. Otherwise the usual "No USB device found" error in AVRDUDE
I might get/make USBASP as a backup, with the 6-pin cable.

stj thanks for posting the files.

[stj]

Re: component testers

well if the output was controlled by an analog pin on the cpu that could be done.

[eccerr0r]

Re: component testers

Right, but those dc-dc converters are not well suited for testing DIACs
(Effectively the best thing for testing DIACs is a curve tracer type functionality...)

[stj]

Re: component testers

some testers have dc-dc convertors to test zeners upto 30 or even 50v
i'm looking at one that may make a good starting platform, but it would still need a rotary encoder and a better cpu.

[eccerr0r]

Re: component testers

Not quite two zeners... at least to prove if it works properly.

Plus these component testers don't directly do high voltage zeners either...

Speaking of weird devices, it probably can't figure out tunnel diodes either.

[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.

[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

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

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

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.

[sam_sam_sam]

Re: component testers

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

[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.

[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.

[Dutch52]

Re: ESR meter upgrades

@STJ

Is your old machine still sketchy ?

[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.

[stj]

Re: ESR meter upgrades

upgrade to a 16MHz crystal too.

[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.