Voltmeter DIY kit

Pracovné napätie : 3.5 ~ 25V

Rozmery : 33 * 52mm

Merací rozsah : 0 ~ 30V

Presnosť: 0.1V

VOT-8 voltmeter kit consists button switch control can work in two-wire or three- wire system in the state . ( Terminals shipped configured for two-wire )

Two-wire ( measured by the voltage of VOT-8 -powered ) , the measurement range of 3.5 to 25.

Three-wire ( from 3.5 ~ 25V voltage of a group of VOT-8 -powered ) , the measurement range is 0 ~ 30V.

2 Then solder capacitors, diodes, potentiometers, etc. .

 Production steps

1 . The first resistance welding 10 (front three , red back welded box 7 ) .

2 Then solder capacitors, diodes, potentiometers, etc. .

3 button switch welding ( note direction ) .

4 IC socket weld , install from the back of the board. Then weld the front of the board ( cut off the excess pin IC holder to prevent the pin to withstand digital . )

5 . Install digital

6 Install microcontroller and pillars ( note SCM direction )

7 production line clip

8 Finally calibrated voltmeter :

Voltage profile with a multimeter or a known voltage of the voltage source , adjust the calibration potentiometer VR1 .