flodo,сan you make small video of work of the LCR-TC1 with a new firmware U4?
I think it is better to wait for a video from someone with the transistor-mod since I am not sure if it behaves correctly.
If you press the button for at least 300ms at power-on the tester will enter the auto-hold mode (no cycling, blinking cursor at the bottom right). And after displaying the result of the last check two short button presses will trigger the menu. If this is working fine your firmware for U4 should also run without any problems with the k-firmware.
I have opened the config.h file from your distribution kit 1.33m. In him I see these settings:
/*
* Voltage divider for battery monitoring
* - BAT_R1: top resistor in Ohms
* - BAT_R2: bottom resistor in Ohms
*/
#define BAT_R1 10000
#define BAT_R2 3300
It is wrong or doesn't work any more?
My AY-AT clone doesn't turn itself off if left alone for several minutes and also doesn't turn off if I try to switch it off manually. If I use the rotary encoder to self "switch off", the screen refreshes and the tester doesn't switch off. Does this suggest a fault? I hope to replace the microcontroller with one flashed with 1.33 (m-firmware) whilst it the one it came with is running 1.12.
My AY-AT clone doesn't turn itself off if left alone for several minutes and also doesn't turn off if I try to switch it off manually. If I use the rotary encoder to self "switch off", the screen refreshes and the tester doesn't switch off. Does this suggest a fault? I hope to replace the microcontroller with one flashed with 1.33 (m-firmware) whilst it the one it came with is running 1.12.
Yes, there's something wrong with your tester. Please check the power control signal (ATmega328 PD6). It should change to low when powering off.
The TC1 standby power consumption seems to be around 0.11mA, so my 2000mAh battery should - in theory and when disregarding self-discharging - last for around 2 years standby. That's okay but not really good... According to the datasheet the consumption of U4 is lower than 0.1uA in power-saving mode, so what is drawing so much power?
@madires: have you ever measured the consumption? what are your results?
Another question: are there any graphics somewhere like in the shipped firmware?
PD6 remains at 5 volts when I select "switch off". The LED at the top of the PCB turns off whilst the rotary encoder is held down but the voltage on PD6 stays on and when the rotary encoder is released, the screen refreshes.
@indman:
The STC15Wxxx is rated for 2.4 - 5.5V (not 3.8 - 5.5V like the STC15Fxxx). So the diodes shouldn't be a problem, right? Neither D3 nor D0.
But, where is D0 on the PCB? I didn't knew about this one.
I have shown the D0 diode on a photo