Have you done the self-adjustment? And to have the result stay on screen start the tester with a long key press or enable UI_AUTOHOLD. Please see the README for details.
Have you done the self-adjustment? And to have the result stay on screen start the tester with a long key press or enable UI_AUTOHOLD. Please see the README for details.
Yea I figured it was the AutoHold, and got that going, but it's actually the self adjustment that does it. So at first start of a fresh flash things work as they should, minus large capacitor amounts shutting the thing down, it still does that. However I found out that if I run the adjustment option, after it's done is when it thinks there is a 22-32pF capacitor across 1-2, also for some reason 2-3 doesn't want to recognize a component connected to it. Or for that matter 1-3. The firmware that I tried using after editing my own configs was the one listed by indman
here. Listed under M328kit+TFT. It still does that.
Very strange! Maybe a different pin assignment (tester and firmware don't match)?
Very strange! Maybe a different pin assignment (tester and firmware don't match)?
The other odd thing is while it doesn't recognize a component connected from 1 to 3, or 2 to 3, it does successfully recognize a PNP Transistor, and a NPN Transistor. As well as mosfets for that matter. So I don't know whats going on.
SirAlucard,
madiresI in such problem cases ask to publish results of hardware T1-T7 tests - it in many respects helps to define a problem source. Do you agree?
What most progressive TT model for 2019?
The other odd thing is while it doesn't recognize a component connected from 1 to 3, or 2 to 3, it does successfully recognize a PNP Transistor, and a NPN Transistor. As well as mosfets for that matter. So I don't know whats going on.
Please enter the menu, run the "test" and post the results.
What most progressive TT model for 2019?
An AY-AT clone or maybe the Hiland M644 (comes with the extended frequency counter). But for the real fancy stuff you still have to build one yourself.
So I just ordered one of these expecting to use it for troubleshooting capacitors in-circuit but it doesn't seem to work right for that. Maybe I am doing something wrong? It is returning capacitance values that are 3x, 5x, even 10x what is printed on the cap.
That is to be expected since there's circuitry in parallel with the cap.
That is to be expected since there's circuitry in parallel with the cap.
But I thought the whole point of LCR/ESR meters was their ability to test components while they are still in the circuit?
Hi,
I have bought a new AY-AT. When i'm calibrate, the values R0= 0.62, 0.64, 0.63
I found these values very high or it's normal ?
Thank
That is to be expected since there's circuitry in parallel with the cap.
But I thought the whole point of LCR/ESR meters was their ability to test components while they are still in the circuit?
Afraid not. That would be quite a device if it could figure out the topology of the circuit, identify the components that are interacting with the one being measured, interpret the behavior of said topology and components, and then infer what the correct value
should be rather than the value that is measured.
As a simple example, if you're given a black box with two terminals to measure the capacitance inside, how can you tell how many capacitors there are without looking in the box? You can measure the total capacitance value, but that could be the result of one or a dozen capacitors. Suppose that you open the box and find that there are five capacitors in parallel. How do you measure the value of the middle capacitor? What about the left-most one?
The only reliable way to measure an individual component is to do it in isolation. In-circuit measurement can be useful if you understand the circuit, what you're measuring, and what you're not measuring, in order to get an idea what may be faulty. Then, you confirm your hypothesis by re-measuring out of circuit.
The other odd thing is while it doesn't recognize a component connected from 1 to 3, or 2 to 3, it does successfully recognize a PNP Transistor, and a NPN Transistor. As well as mosfets for that matter. So I don't know whats going on.
Please enter the menu, run the "test" and post the results.
It doesn't really give me values at the end of it, unless I'm suppose to go to the values section in which case these are what is listed below.
Ri- 20.0Ω
Ri+ 22.0Ω
C0 43pF
R0 0.20Ω
Vref 1096mV
Vcc 5013mV *
AComp 0mV
SirAlucard,madires
I in such problem cases ask to publish results of hardware T1-T7 tests - it in many respects helps to define a problem source. Do you agree?
What are the hardware T1-T7 tests?
I have a GM328 (red PCB) Transistor Tester with ST7735 display (pls see attached picture)
I am looking for the original 1.12k firmware.
Is there anyone who made a copy of the original 1.12k firmware that can send me .hex and .eep files?
Thank you!
s.g.
The test function runs several checks (T1...), each check is done 5 times. Note the results (second line) once for each check. It's explained in the README.
Is there anyone who made a copy of the original 1.12k firmware that can send me .hex and .eep files?
Original mod chinese firmware 1.12k it is locked for read!
Thank you indman for your prompt reply.
I tried different FW (both compiled and to compile) but no one has the same features of the original one and, even going thru all the changes and settings, I cannot get a 100% hardware compatible and stable firmware running on my tester.
Is there any specific version you recommend for my TT model? Thanks!
Hi,
I have bought a new AY-AT. When i'm calibrate, the values R0= 0.62, 0.64, 0.63
I found these values very high or it's normal ?
Thank
Is there any specific version you recommend for my TT model? Thanks!
It's an AY-AT clone. If you like to use the k-firmware please try mega328_color_kit from the repo.
I have bought a new AY-AT. When i'm calibrate, the values R0= 0.62, 0.64, 0.63
I found these values very high or it's normal ?
My testers with a ZIF socket have around 0.2 Ohms usually. Have you measured a film cap (220-2200nF) three times before running the self-adjustment?
Hi madires,
I have not try to measure film cap before calibration. Now it's done, but i have again a high values, but the accuracy is good.
Is't possible my encoder has a resistor value ?
Thank
Encoder? Are you using a rotary encoder to short the probes?