I have a question - whether it is possible to add an inductance icon on the display on the right how it is made for transistors or thyristors?
8 or 16 MHz? Which 5V regulator?
Is there any way to investigate this further?
Question:
I compiled Version 1.28m AY-AT Color and enabled the External reference. The Selftest or Show Values show Vref=1088 and not my entered Value of 2498.
Am I missing something?
Also when I place a short between Pins 1 and 2 it measures 0 ohms , when I place a short between Pins 2 and 3 it measures 0 ohms but when I place a short between pins 1 and 3 it measures 20pf between pins 2 and 3.
I tried with both a 9V battery and a battery eliminator (power supply with a 9V battery connector).
I assumed that when the external reference is enabled, vref would be the external reference shown.
Is it possible to enable and disable the reference by software to be able to compare them instead of having to recompile the firmware?
I haven't programmed seriously for 20 years but I'm becoming dangerous again daily
Is it possible that with the 20MHz crystal the tester has hard time measuring resistance lower than 0.1 ohms? It has not problem detecting the shorts for calibration.
I'm working on a version of the board that drives a couple of relays connected to PC3 and PD5 (which weren't used in the version of the board that I purchased). For some reason, PC3 wants to come on regardless of what I am doing with it. Is it being driven in the assembler code?
I'm working on a version of the board that drives a couple of relays connected to PC3 and PD5 (which weren't used in the version of the board that I purchased). For some reason, PC3 wants to come on regardless of what I am doing with it. Is it being driven in the assembler code?
PC3 is the analog inut for the Zener or external voltage option for an ATmega328 based tester. If that option isn't enabled in the firmware, the pin should be in HiZ mode. Which firmware are you using?
Is it possible that with the 20MHz crystal the tester has hard time measuring resistance lower than 0.1 ohms? It has not problem detecting the shorts for calibration.
I haven't noticed anything like that, but I'll check a few resistors.
I re-created the board by hand and created a project in KiCad (with my relays) from it. From there, Hackvana made the boards for me (great resource!). I've built one board, and it works fine with the exception of the relays. It's just that the pesky relay off of PC3 keeps coming on.
The same thing happens to me in the LCR-T4-H and in the AY-AT.
In resistors less than 1 Ohm indicates missing component or marks a few picofarads.
A greeting.
P.S. In both I have installed 16 Mhz quartz crystals.
For AY-AT(20MHz crystall) of a clone I changed settings of the inductor.c file. Also the enkoder works with the "define ENCODER_PULSES 2" setup better.
I re-created the board by hand and created a project in KiCad (with my relays) from it. From there, Hackvana made the boards for me (great resource!). I've built one board, and it works fine with the exception of the relays. It's just that the pesky relay off of PC3 keeps coming on.
How do you drive the relays?
The Atmega pins drive a transistor which in turn drives the relays.
For AY-AT(20MHz crystall) of a clone I changed settings of the inductor.c file. Also the enkoder works with the "define ENCODER_PULSES 2" setup better.
Could you please try "ENCODER_PULSES 4"?