I read an older PDF description of this project that is very detailed and helpful.
It suggested the Chinese clone boards need a 0.1uF capacitor on the ATMega168 for power decoupling across Vcc/Gnd.
I'll probably try that next.
EDIT: I forgot to program new fuse bits "make fuses; sudo avrdude ...." -- so now it's working.
It's in continuous mode now, but I'll fix that.
Thanks for the link to the current documentation. I checked out the SVN repository, but didn't look under Doku for the current docs.
I discovered the continuous mode and internal menu from the documentation in your branch -- I really like it!
I like Karl-Heinz's use of serial output using PC3 (usart pin?) for output. Do you have plans to use this?
Also - my Chinese clone board has a 2v zener for voltage reference, but I can't find any place in your code where to read the PC4 (ADC4) voltage reference.
I measured my voltage as 1.955 volts, and wanted to specify somewhere in the code for precision. but I can't find it.
Am I missing something?
My only problem now is during the self test or Adjustment modes, when I'm told "Create Short Circuit" and then connect all three test pins together, it does not proceed.
I see in the code that it loops waiting to confirm all 3 points are shorted, but in my case it does not proceed.
I confirmed resistance from TP1,2,3 back to input pins on TQFP32 ATMega168 - all traces are connected with expected resistance.
Any ideas?
I was next going to add a debug mode during Create Short Circuit to display shorted pins.
I'll just write to line 1 LCD something like "12" if pins 1,2 are shorted. eventually it should write "1231" to show all are shorted.
The serial output mode would be useful, to write debug messages to a terminal.
A bought a ebay kit, and it's excelent! But i want to modify to measure ESR cap in circuit! I saw some esr-meters on net that uses 2 diodes, what is the best solution and the safest. I can eventualy use a swich when i need to take esr measurements in circuits. Please help me
Any suggestions for better component test sockets than the 0.1" female header used in the Chinese clones, sockets that will more easily allow insertion of a wider range of lead diameters?
My clone is marked Ver. 2.4 2013/06/05 and has a zener diode in the D1 position. In the docs, this is said:
"One error is the assembly of the part "D1", which should be a precision 2.5V voltage reference. Assembled is only a zener diode. This part should be removed. You can mount a LM4040AIZ2.5 or LT1004CZ-2.5 precision voltage reference at this place. A missing voltage reference is noticed by the software, so that you must not install the voltage reference."
I don't understand the meaning of the highlighted portion. It says that a missing voltage reference is detected by the software, so don't install one. That doesn't make sense.
Has anyone found a suitable case?
Something like this:
http://www.ebay.com/itm/140957444342
Any suggestions for better component test sockets than the 0.1" female header used in the Chinese clones, sockets that will more easily allow insertion of a wider range of lead diameters?
I've added 4mm banana sockets and use short test leads with crocodile clips or probing clips. For SMD stuff I use one of those SMD probing tweezers.
PS: 1.09m is released (fixed pin assignment bug for MOSFETs, added IGBT detection and hFE considers leak current now).
Where did the rest of this thread go? I could have swore it was more than 3 pages.
I was intrigued by this transistor tester and fancied making one myself, then found this chinese complete kit posted. It comes in a rather naff case, but with hook probe leads and a ZIF socket, seemed a bargain to me. I've got it, but no instructions. I shorted all the leads and reset it and it goes through an intruiging cycle of self tests then reports "Test End. Version 1.07k"
I notice all your firmware versions are 1.0xm - Can I flash your latest stuff?
i have downloaded new software 1.10m but i can't find schematic with all hardware option for this release
Where i can find it?
the pdf is very complex. it's a transistor tester that can also be used to measure coils and capacitors?
@madires: I was on the hunt for a LC-Meter that also can measure crystals, ESR etc
on eBay I found different devices, some (the ones that look kinda neat) only have Chinese text on the LCD
so I found this thread and read that they copied it from the project you're working on
what I want to do: make a portable device with a color gLCD that also shows the symbols and info like this one:
right now I'm just collecting informations for my next arduino project (I plan to put an FT232, mega328 and everything else on a PCB)
since I'm an arduino beginner: would it be possible to get some help to implement the code for the gLCD?
do you see any problems using a gLCD? (as in connection problems, not enough free space on the mega328) etc
will a step up converter be troublesome for measurement accuracy?