Author Topic: $20 LCR ESR Transistor checker project  (Read 1464621 times)

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Offline madires

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Re: $20 LCR ESR Transistor checker project
« Reply #5225 on: Yesterday at 12:16:24 am »
Great! I'll add both fonts to the next firmware version.
 

Offline Mechatrommer

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Re: $20 LCR ESR Transistor checker project
« Reply #5226 on: Yesterday at 03:24:58 am »
i tried editing firmware ComponentTester-1.34m to work with my TC1 (atMega324PA) Tester, i used TC1-Mod circuit as suggested, so no more STC15W104 chip. the problem is immediate exit (power off) after measurement (or no component), problem similar to...
* once online the device is testing and so on, afterwards it says IMMEDIATELY 'bye' - there is no delay, you cannot even read the values
in page 204...

Have you set the MCU clock to 16MHz in the Makefile?
yes i've edited makefile FREQ = 16, still same problem.

attached is the file i edited (with comment "soa") so i/you can easily track where i edited.
any idea? esp @madires. please help... i've wasted many time on this DANIU TC1 crap.
« Last Edit: Yesterday at 03:30:42 am by Mechatrommer »
if something can select, how cant it be intelligent? if something is intelligent, how cant it exist?
 

Offline Andbro

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Re: $20 LCR ESR Transistor checker project
« Reply #5227 on: Yesterday at 03:53:57 am »
Hi,

On the website of Mikrocontroller.net where we can find the latest Firmware Karl-Heinz, there are several possible models. Is there a website where you can find a photo with the model ?

Thanks
Modify message
 

Offline madires

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Re: $20 LCR ESR Transistor checker project
« Reply #5228 on: Yesterday at 04:51:26 am »
i tried editing firmware ComponentTester-1.34m to work with my TC1 (atMega324PA) Tester, i used TC1-Mod circuit as suggested, so no more STC15W104 chip. the problem is immediate exit (power off) after measurement (or no component), problem similar to...
* once online the device is testing and so on, afterwards it says IMMEDIATELY 'bye' - there is no delay, you cannot even read the values
in page 204...

Sounds like a problem with the test push button at PD1. When not pressed it should be a high signal, and low when pressed. Does the mod create the correct logic levels?
 

Offline madires

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Re: $20 LCR ESR Transistor checker project
« Reply #5229 on: Yesterday at 04:55:47 am »
On the website of Mikrocontroller.net where we can find the latest Firmware Karl-Heinz, there are several possible models. Is there a website where you can find a photo with the model ?

As Willem52 has already posted: https://yadi.sk/d/yW8xa5NJgUo5z. A few clones are also depicted in Karl-Heinz's excellent  documentation.
 

Offline Mechatrommer

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Re: $20 LCR ESR Transistor checker project
« Reply #5230 on: Yesterday at 02:12:34 pm »
i tried editing firmware ComponentTester-1.34m to work with my TC1 (atMega324PA) Tester, i used TC1-Mod circuit as suggested, so no more STC15W104 chip. the problem is immediate exit (power off) after measurement (or no component), problem similar to...
* once online the device is testing and so on, afterwards it says IMMEDIATELY 'bye' - there is no delay, you cannot even read the values
in page 204...

Sounds like a problem with the test push button at PD1. When not pressed it should be a high signal, and low when pressed. Does the mod create the correct logic levels?
you nailed it, thank you! there somekind of leakage making Q2 to always turned ON even if button is not pressed, the solution is i added 100KOhm pull down on the Q2's base. earlier is even worse, Q1 is always ON, it turned out leakage on smd capacitor C13 on the TC1 pcb, so i removed it and now it works. attached is my mod... Q1 and Q2 is 2N3906 and 2N3904 if that matters.

now the tester function as it should, 5 times testing no component, and then turned off. similarly when testing component, transistor for example, it will cycle indefinetely around 3 second each cycle, this is a bit annoying esp when we want to write down components parameters on paper. my M328 tester (now with my brother) is better, it will test component, and it stay there on the output result for longer time. can you direct me on the code how to adjust timeout if component is detected, so its like. if component detected, cycle timeout = say 10 seconds, but if no component, timeout is 3 seconds. or else, how the M328 function?

another thing, there are corrupted image on the right side of my screen, and random garbage on left and top part of the screen, see 2nd attachment. can this be fixed? thanks for your help.
if something can select, how cant it be intelligent? if something is intelligent, how cant it exist?
 

Offline Andrey

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Re: $20 LCR ESR Transistor checker project
« Reply #5231 on: Yesterday at 06:13:39 pm »
Dear madires. Need your help. I connected the VS1838B IR receiver to the PD4 and the IR transmitter to PB2. But they do not work.
My files, please see where my mistake is.
Thank!
 

Offline madires

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Re: $20 LCR ESR Transistor checker project
« Reply #5232 on: Yesterday at 09:10:59 pm »
now the tester function as it should, 5 times testing no component, and then turned off. similarly when testing component, transistor for example, it will cycle indefinetely around 3 second each cycle, this is a bit annoying esp when we want to write down components parameters on paper. my M328 tester (now with my brother) is better, it will test component, and it stay there on the output result for longer time. can you direct me on the code how to adjust timeout if component is detected, so its like. if component detected, cycle timeout = say 10 seconds, but if no component, timeout is 3 seconds. or else, how the M328 function?

When powering on, keep the push button pressed a little bit longer (>300ms) to select the auto-hold mode. You could also enable UI_AUTOHOLD in config.h.

another thing, there are corrupted image on the right side of my screen, and random garbage on left and top part of the screen, see 2nd attachment. can this be fixed? thanks for your help.

Disabling LCD_OFFSET_X and LCD_OFFSET_Y should fix that. The ST7735 drives 132x162 pixels while the LCD has only 128x160. Based on how the LCD is wired to the controller the addressing has to be shifted accordingly by the firmware.
 

Offline madires

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Re: $20 LCR ESR Transistor checker project
« Reply #5233 on: Yesterday at 09:44:57 pm »
Dear madires. Need your help. I connected the VS1838B IR receiver to the PD4 and the IR transmitter to PB2. But they do not work.
My files, please see where my mistake is.

In your case PD4 is used for the 680 Ohms probe resistor for probe/test pin 2. That means you should connect the IR receiver module to the probes when running the IR detector tool, i.e. SW_IR_RECEIVER. BTW, you've enabled HW_IR_RECEIVER (dedicated pin) and SW_IR_RECEIVER (via probes). PD4 (OC1B) is also used as signal output for the IR transmitter.
 


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