Recent content by vlad_vy

The CR2032 battery is used in computer motherboards. Have you ever changed the battery in your computer? Moreover, the DS1302 chip has trickle charger for a backup battery.

Added backup battery CR2032 to DS1302 chip inside CT-22 display. Now RTC clock don't depends from power supply. Desolder pin 8 from PCB and connect to pin 8 the backup battery.

Now I see that the bargarph newer rise, but after display reboot only. You can try to set discharge voltage levels with voltage sag. And return J and C to defaults. I think they related to voltage change rate.

If voltage will rise, you need J-xxxx time to remember new value. If voltage will drop before J-xxxx time expire, bargraph will immediately return to previous position. If voltage will drop, you need C-xxxx time for the bar graph fall from full power to zero. Or C-xxxx time / 10 for each...