Is this all the stuff I need to start programming the chip???
Could I ask you for the links to these, please?
I want to run the M-firmware, so it looks like I need to make the mods shown here: https://www.eevblog.com/forum/testgear/$20-lcr-esr-transistor-checker-project/msg1286025/#msg1286025
1. The AY-AT kits that I'm seeing don't have the IR sensor. It's not that I really NEED that, but it would be cool to have. Is there a way to add the IR to that board?
2. The kits that I'm seeing come with a monochrome LCD display. Is it possible to swap out for a color LCD/OLED or is that not recommended at this time? If color is okay to use, which display is best for this application? The ILI9341?
3. I can't tell what ATMega chips are coming with the kits that I'm finding. It looks like maybe a 328P The posted specs are rather limited. Do I need to worry about this? What is the most recommended chip at this time?
4. Likewise, I can't tell what crystal comes with the kits. Is it simply a matter of swapping out for a 20Mhz? The ATMega won't mind? I'm guessing not since the specs at http://www.microchip.com/wwwproducts/en/ATmega328p indicate that it supports 20Mhz. Just want to make sure.
I want to run the M-firmware, so it looks like I need to make the mods shown here: https://www.eevblog.com/forum/testgear/$20-lcr-esr-transistor-checker-project/msg1286025/#msg1286025
You don't have to mod the AY-AT, but the mod will improve the tester for just a few bucks.1. The AY-AT kits that I'm seeing don't have the IR sensor. It's not that I really NEED that, but it would be cool to have. Is there a way to add the IR to that board?
Simply start the IR decoder and connect the IR receiver module to the three probe pins.2. The kits that I'm seeing come with a monochrome LCD display. Is it possible to swap out for a color LCD/OLED or is that not recommended at this time? If color is okay to use, which display is best for this application? The ILI9341?
If you prefer a large screen the ILI9341/9342, otherwise the ST7735 or ILI9163.3. I can't tell what ATMega chips are coming with the kits that I'm finding. It looks like maybe a 328P The posted specs are rather limited. Do I need to worry about this? What is the most recommended chip at this time?
Yes, it's an ATmega328. There aren't any clones with ATmega644/1284 to buy yet, i.e. you would have to build one yourself. If you enable all features the 328 will be maxed out. And there are also some hardware options which require the additional I/O pins of a 644/1284.4. Likewise, I can't tell what crystal comes with the kits. Is it simply a matter of swapping out for a 20Mhz? The ATMega won't mind? I'm guessing not since the specs at http://www.microchip.com/wwwproducts/en/ATmega328p indicate that it supports 20Mhz. Just want to make sure.
It comes with an 8 MHz crystal, IIRC. I'd recommend the 16 MHz crystal because it will allow you to run both firmwares (k & m).
I wrote that on K software my tester works but thats not true, after some time it displays message "uncalibrated"
I found this information in documentation of k software:
At this place I will give you an additional important hint. Never do a measurement with connected ISP plug!
The ISP interface influences the measurement.
Could it be that the programming cables cause the issues with your software too? By the cables I mean about 4cm long from microcontroller to 6 pin isp plug. The cables are lying on the pcb.
The reason is that three pins of the MCU are shared between ISP and probe/test resistors. The length of the traces (and wires in your case) should be kept as short as possible, and the layout should keep the traces away from noisy stuff. I don't think a few centimeters are a problem. More likely the wires are picking up some signal from another trace/wire. A few mV can already screw up the ESR measurement.
HI, i have an multifunction tester TC1 but is with Atmega324P not Atmega328
Can help someone with firmware for this tester?
Hi Madires, can I just follow on with a question here, don't know if you saw my linked post below already.
Anyway I got that relay I was thinking of using to switch out the ISP leads, but would you say that would not work well anyway then?
Reason I have not tried it is because it was a bit bigger than what I understood from the specs so I would have to cut the case a bit...
https://www.eevblog.com/forum/testgear/$20-lcr-esr-transistor-checker-project/msg1387441/#msg1387441
HI, i have an multifunction tester TC1 but is with Atmega324P not Atmega328
Can help someone with firmware for this tester?
The ATmega324 is supported by k and m-firmware but the TC-1 has an additional ATtiny for controlling some signals. Someone would have to reverse engineer that ATtiny. Another issue with the TC-1 is the poor pin assignment. By swapping two pins the circuit could support hardware SPI.