DIGITAL ESR/CAPACITANCE METER |
Russian ESR/Capacitance Meter "Go" with PIC16F877. Same ESR/Capacitance meter can be found using PIC16F876 (873): Kripton ESR Archive
Measurement range:
ESR 0,001...11ohms
Capacitance: 1...150000uF
Calibration procedure:
Shortcircuit probes, adjust R4 resistor in order to obtain zero indication (0,001-0.01). Do not adjust for absolute "0" indication.
Press S1 "SET" switch during power ON . Calibration menu can be accessed.
Using S1 switch to change between 1 ohms /10ohms /Cx EEPROM values. Press S2/S3 to change the calibration factor. Press again S1 to store the settings.
If is necessary, repeat calibration procedure.
For Cx calibration use a good quality capacitor 100...1000uF and 0.33/10 ohms resistor (1%) for 1/10 ohms ESR scale.
Good accuracy can be obtain.
Schematic diagram PIC16F877
Firmware PIC16F877 (old version)
PCB (Elforum)
ESR Meter Box
New Firmware PIC16F877 v.1.16, 27/10/2019
Original and discussion on the Pro-radio.ru forum.
- added battery charge indicator
- added correction constant for the minimum capacitance of the capacitor
- added ESR and Cx software filters for more stable display readings
LINKS
Kripton ESR Meters Website
ESR "GO" - Russian
Gint Oleg Website
