ESR meter upgrades

[stj]

more improvements
details here:
https://github.com/svn2github/transi...commits/master

[stj]

get ready for - optocoupler testing!
soon.

[stj]

now tests optocouplers.

[xelectech]

Originally Posted by stj

now tests optocouplers.

Dam, that's impressive! Have you thought any about selling one of those with the software loaded? How much would you want/have to get for one?

[stj]

not worth it, if you take the china price and add European postage to forward it, you damn well ad 50% to the price before you even add the programming header & rotary encoder & crystal.

you would be doubling the original price by the time your done!

[xelectech]

Originally Posted by stj

not worth it, if you take the china price and add European postage to forward it, you damn well ad 50% to the price before you even add the programming header & rotary encoder & crystal.

you would be doubling the original price by the time your done!

I understand - still, sounds like a totally excellent piece of test equipment!

[stj]

maybe the chinese should include the header and faster crystal - then sell a bundle with the programmer.

[xelectech]

Originally Posted by stj

maybe the chinese should include the header and faster crystal - then sell a bundle with the programmer.

That would be cool - the prices they pay for this kind of stuff must be mind boggling...

[roko]

hi.
When upgrade to 16 mhz crystal , need to change fuses values?

[stj]

no, but if you didnt flash before then the chip will be erased to clear the locks.
fuse values are in the avrdude text file.

[stj]

here is a new build.
same code as before, but an extra version with no serial but nice fonts restored.

[stj]

i have an important question to anybody using or planning to use these testers.

what frequency's do you use or need from the frequency generator?
because i'm making large changes to it to save space.
i have a private test version that just generates 50Hz, 60Hz, 100Hz, 120Hz.
these frequency's are mains derivatives that can be used when testing things that time themselves from the mains like clocks.
(or comodore 64's!)

so lets hear it - what do you need?

[stj]

bugfixes & worthy stuff.
16MHz build has the big fonts and serial port back now.

[Per Hansson]

Would it be possible to get it to 32Mhz or is that beyond the abilities of the controller?

[stj]

the atmel is rated at 20MHz, i know they have been o.c.'d to 40MHz+ but the problem is the slowest part - the ADC is the bit we need to work right!

in theory it could be clocked at 20MHz but the timings in the code are only for 1, 8 & 16MHz right now.
dont ask me why it's got timings for 1MHz.

*maybe it could be o.c.'d to 24MHz wihout problems - that's a nice number (8x3) so probably not to hard to work out the values needed.

[stj]

i emailed the master about the 24MHz idea - we shall see what he says.

[stj]

version 661
some bug fixes, + i added the instrument tuning frequency 432Hz to the generator.

[Per Hansson]

Ok cool, would be really useful with a tester for 32Mhz crystals since they are so common on mainboards.
See here for an example

http://www.badcaps.net/forum/showthr...415#post539415

[stj]

for that, use a uni-t ut61E or one of these.
http://www.ebay.co.uk/itm/181573121672

even if you overclock the atmel on the component tester to 24MHz and it works, you wont read crystals higher than about 22MHz

[xelectech]

Could someone tell me if the following item could be used to program one of the atmega168
or atmega328 chips?

http://www.ebay.com/itm/Basic-Starte...-/331675682733

TIA