$20 LCR ESR Transistor checker project

[Gino_09]

Hi
Help..
Can anyone post zip with modified files (config and make)  for AY-AT DIY Color kit m-firmware?
I must resolve fuse problem and i think I'm wrong
Thanks

[madires]

The settings for the AY-AT DIY Color kit are listed in the "Clones" file.

[jellytot]

A little bit of progress with the TC1. It appears to be using an ST7735s lcd driver ic display, see attached data sheet for the display. using
modified settings in the config_644.h see attached file I am able to get a brief display using spi bit banging..
In order to get it to make a measurement I have to press the button a second time before it times out, but it all displays very fast before "bye" and then powers off.
I'm Not sure how to keep it from timing out? the zener and ir test doesn't appear to be working either. There is an 8p soic unmarked chip U4 that appears to connected to the
power management side of things..well that's as far as I have managed to get... 

[casinada]

This is for the AY-AT with 1.28m firmware.
Note that I use an external programmer (TL866) so all the programming commands are disabled.
The fuses for the 328P as mentioned elsewhere:
LFuse: 0XF7
HFuse:0XD9
EFuse:0X04 (0XFC)

[carrascoso]

Grazie! I'll add it to the source. Some strings are a little be too long (max. 14 characters for menu items and 16 for other stuff to keep everything within the typical 16 char/line range).

Correct.

Hello, I'm new at this.
Where and how is this file placed in the ESR tester?
Since I want to put it in Spanish

Thank you

[madires]

I'm Not sure how to keep it from timing out? the zener and ir test doesn't appear to be working either. There is an 8p soic unmarked chip U4 that appears to connected to the
power management side of things..well that's as far as I have managed to get... 

Do you got a circuit diagram for that clone?

[madires]

Where and how is this file placed in the ESR tester?
Since I want to put it in Spanish

Spanish texts are included since v1.26m (UI_SPANISH) and the k-firmware also supports Spanish.

[carrascoso]

Where and how is this file placed in the ESR tester?
Since I want to put it in Spanish

Spanish texts are included since v1.26m (UI_SPANISH) and the k-firmware also supports Spanish.

I had the LCR-T4 which without realizing it spoiled it without realizing it when putting a capacitor without discharge.
Now I have bought another LCR-T4 and a GM328, and when I receive them upgrade to the latest version possible and be in Spanish language.

What are the latest versions for such devices?

Thank you

[madires]

The latest firmware versions are 1.13k (trunk) and v1.28m. You can get them from https://www.mikrocontroller.net/svnbrowser/transistortester/ or https://github.com/svn2github/transistortester.

[jellytot]

Unfortunately I've no schematic, but it is the same as this device that Dwaine posted with good photos    https://www.eevblog.com/forum/testgear/$20-lcr-esr-transistor-checker-project/msg985243/?topicseen#msg985243

U4 pins 7 and 8 go to PD1 & 2 on the micro
pin 1 & 4 is SW & Gnd
pin 5 & 6 go to P1 & P2

from the manual, see attachment.
2.7   Power off
The Multifunction Tester with automatic shutdown and manual shutdown.
?   Automatic shutdown
When the component detection completed or IR decoding completed and after reaching the automatically shut down time, the tester automatically shut down.
Automatic shutdown time can be set by the hardware jumpers, timeout support for 10s, 15s, 20s and 25s. Factory set to 20s.
 
These are the other pinouts

#define TP_ZENER         PA4       /* test pin with 10:1 voltage divider */
#define TP_REF           PA3       /* test pin with 2.5V reference and relay */
#define TP_BAT           PA5       /* test pin with 4:1 voltage divider */  This goes through a 1meg R only ?
 
 

[madires]

At first glance I see a 16 MHz crystal (FREQ = 16 in Makefile). That would explain the fast display output. Please check to which MCU pin the IR receiver module's data line is connected. For the fixed IR receiver you need to enable HW_IR_RECEIVER (config.h) and set IR_PORT and so on (config_644.h). The timeout jumpers are something new. PD0 and PD1 are a serial port (reserved for serial communications), and PD2 is normally the 680 Ohms test resistor for probe #1. Seems to be a circuit with several modifications. With a little bit of reverse engineering we might be able to get that clone running.

[jellytot]

Hello madires. Here are the the files that I modified and used, there may well be errors...

[jellytot]

config_644.h
/*
 *  IR detector/decoder
 *  - fixed module
 */

#define IR_PORT          PORTD     /* port data register */
#define IR_DDR           DDRD      /* port data direction register */
#define IR_PIN           PIND      /* port input pins register */
#define IR_DATA          PD3       /* data signal */

config.h

/*
 *  fixed IR remote control detection/decoder
 *  - requires IR receiver module, e.g. TSOP series
 *  - module is connected to fixed I/O pin
 *  - see IR_PORT for port pin (config-<MCU>.h)
 *  - uncomment to enable
 */

#define HW_IR_RECEIVER

[Gino_09]

m-firmware 1.28

Is it normal that by analyzing a component after the measurement there is no stop on the result,
but the test resumes cyclically?

Is it correct that the self-test does not require the insertion of a capacitor?

Thanks

[madires]

The m-firmware supports two operations modes which are selected at power-on by the duration you press the test button. A short button press selects the continious mode (automatic cycling) and a long button press (>300ms) selects the auto-hold mode (tester waits for confirmation to continue). And yes, the self-test doesn't require a capacitor. But before running the self-adjustement you should check a film cap (220nF up to a few µF) at least three times. There's also a hardware option for a fixed adjustment cap.

[Pukker]

This is for the AY-AT with 1.28m firmware.
Note that I use an external programmer (TL866) so all the programming commands are disabled.
The fuses for the 328P as mentioned elsewhere:
LFuse: 0XF7
HFuse:0XD9
EFuse:0X04 (0XFC)

Is this file for 8 or 16 Mhz?
Thanks.

[Gino_09]

This is for the AY-AT with 1.28m firmware.
Note that I use an external programmer (TL866) so all the programming commands are disabled.
The fuses for the 328P as mentioned elsewhere:
LFuse: 0XF7
HFuse:0XD9
EFuse:0X04 (0XFC)

Is this file for 8 or 16 Mhz?
Thanks.

8 mhz

[Pukker]

Do you have the 16 Mhz version maybe?
Thanks.

[rabbi_josiah]

ok will try for a third time
i bought from fuzzbay a tester for $11.88
these are the two manuals they emailed me but due to size i will have to do this twice
they are in english chinese style lol

[rabbi_josiah]

same board as your but different LCD screen
hope my pdf file helps anyone

[rabbi_josiah]

my tester bought on eBay auction: # http://www.ebay.com/itm/111990329664?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT for $11.88 has different screen but the same board and m388 ic here is the asembly manual they sent via email to me


https://drive.google.com/file/d/0B10V3WQ_LRjGeEdYRTlKVGdkYUE/view?usp=sharing

[Willem52]

Josiah,

This tester is here named as Color TFT Kit and also AY-AT.
This model is described in this forum part over and over.
However the thread is quite long already...

It starts about here:
https://www.eevblog.com/forum/testgear/$20-lcr-esr-transistor-checker-project/2050/

The screen is the same you showed, if there are differences they are minor.

[rabbi_josiah]

thank you very much good sir have been attempting to obtain manual then the vendor provided one was trying to share and looking through that posts seem as if the units were not the same
here is the link to show what i bought
http://www.ebay.com/itm/111990329664?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
again just trying to be helpful with my discovery even how ever missplaced

[madires]

Nice to see LCD modules with level shifters. BTW, I'm changing all display drivers to support a common SPI framework (similar to the I2C framework). That way other SPI driven stuff can be added easily in the future. To keep the configuration simple the SPI bus can be set in the display section (just a few lines more for each display) or in a separate section. Another benefit is that the SPI bus and the control signals, like /CS, can be on different ports.

[rabbi_josiah]

well you just spoke greek not german lol
have no clue what SPI framework is at this time
i am just beginning in my electronics hobby and figured a good way for me to learn is to build