Hi everyone!
Someone might have asked that already in this threat but what is in your opinion the best one out of those many versions?
Thanks for your replies!
Greetings,
Jannis
SOLVED_2!! "m-firmware .eep file too big"
Same as before, loading the .eep file as INTEL HEX it actually fit on the eeprom and the m-firmware is now up and running
I noticed that the text alignament on the screen is not perfect and there are some dots on the left of the screen (see attachment).
I'll verify the config.h and make file...
I attached a picture of the case I modified to accomodate the ZIF.
I hate the white connector that came with the enclosure and I much prefer the ZIF!!
Yes I made my custom faceplate
I just bought one of these $12 wonders to use at my camp which is 12V. Tested a capacitor and the value was close, but the ESR read 18 ohms. Choose a lot of different value caps (other than electrolytics) and it is still 18 ohms. Place a 51 ohm resistor in series with the cap and it is still reads 18 ohms. Actually, this is about what I expected. I think it is a very handy device. Just don't take the numbers too seriously.
I just bought one of these $12 wonders to use at my camp which is 12V. Tested a capacitor and the value was close, but the ESR read 18 ohms. Choose a lot of different value caps (other than electrolytics) and it is still 18 ohms. Place a 51 ohm resistor in series with the cap and it is still reads 18 ohms. Actually, this is about what I expected. I think it is a very handy device. Just don't take the numbers too seriously.Or consider you have a faulty unit!
I just bought one of these $12 wonders to use at my camp which is 12V. Tested a capacitor and the value was close, but the ESR read 18 ohms. Choose a lot of different value caps (other than electrolytics) and it is still 18 ohms. Place a 51 ohm resistor in series with the cap and it is still reads 18 ohms. Actually, this is about what I expected. I think it is a very handy device. Just don't take the numbers too seriously.Or consider you have a faulty unit!
I contend that any ESR reading of a capacitor below 1uF with these devices is bogus.
Again, I measured a .33uf capacitor with a 51 ohm resistor. It read 2.2 ohms without
the resistor and 14 ohms with the resistor. On another machine it read 1 ohm and 53
ohms respectivly as it should. I invite everyone to make similar tests with a variety
of capacitor values. I suggest these programs surpress ESR readings on the display
beyond certain values since they have no relation to reality.
I contend that any ESR reading of a capacitor below 1uF with these devices is bogus.
Again, I measured a .33uf capacitor with a 51 ohm resistor. It read 2.2 ohms without
the resistor and 14 ohms with the resistor. On another machine it read 1 ohm and 53
ohms respectivly as it should. I invite everyone to make similar tests with a variety
of capacitor values. I suggest these programs surpress ESR readings on the display
beyond certain values since they have no relation to reality.
I suggest these programs surpress ESR readings on the display beyond certain values since they have no relation to reality.
I suggest these programs surpress ESR readings on the display beyond certain values since they have no relation to reality.
I'm pretty sure madires or someone else confirmed this many pages back in this thread. Quick search didn't find it, but really remember this being discussed.
Edit: Also supposed to suppress the ESR reading if the measured value is lower than internal resistance of the pins.
A quick testing with 2 of the cheap testers (both M12864 - http://www.banggood.com/DIY-M12864-Graphics-Version-Transistor-Tester-Kit-LCR-ESR-PWM-p-986954.html) and an Agilent U1733C (@10kHz). The first column of values is from a M12864 with K firmware v1.12k r555. The second column of values is M12864 with M firmware v1.20m-trendy. Third column of values is the Agilent U1733C at 10kHz test frequency. Values are close enough for me.
M12864-K M12864-M U1733C
1uF Eloctro 3.6ohm 3.61ohm 3.813ohm
0.47uF Electro 4.1ohm 3.91ohm 4.218ohm
0.47uF Electro 3.8ohm 4.09ohm 4.068ohm
0.33uF Tantalum 3.5ohm 2.68ohm 3.522ohm
0.10uF Tantalum 9.7ohm NoEsr 10.236ohm
I also need to test this supercap https://www.maxwell.com/images/documents/bcseries_ds_1017105-4.pdf (see page 3) and I will read the K-firmware documentation to verify if this can be achieved. Was this already discussed??
I suggest these programs surpress ESR readings on the display beyond certain values since they have no relation to reality.
I'm pretty sure madires or someone else confirmed this many pages back in this thread. Quick search didn't find it, but really remember this being discussed.
Edit: Also supposed to suppress the ESR reading if the measured value is lower than internal resistance of the pins.
I also need to test this supercap https://www.maxwell.com/images/documents/bcseries_ds_1017105-4.pdf (see page 3) and I will read the K-firmware documentation to verify if this can be achieved. Was this already discussed??
The theoretical limit for capacitance is 100mF but I'd say the working limit is about 20mF. Goldcaps can't be measured at all (mostly detected as a diode or two anti-parallel diodes).
Just for reference for anyone else, this version isn't very good. http://www.ebay.com/itm/271972464770?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
The only limitation I can see is the time it will take the test, but this is not an issue for my needs.
Is there something else that will require a hardware change?
@Gyro, I have this exact tester which I payed $11 for it on AliExpress. I am curious why do you say "It's not a good choice if you want to start adding encoders"? I have one of this rotary encoders on order and I am planning to install it. Once I get all the parts I am also planning to replace the 9V battery with a rechargeable Li-Ion and add a protection relay.