3 in 1 – Digital Clock, Temperature Monitor and Voltmeter Module (Red LED)

3 in 1 – Digital Clock, Temperature Monitor and Voltmeter  Module (Red LED)

This is a super cool and tiny device! It offers three functionality, you could use this as your digital clock or read some temperature with the provided temperature probe on the back and even use it as a voltmeter to read low dc voltages if you are in a pitch. 

This device uses a four character seven segment display and neatly connected in the back the controller board that offers these features. Although the manufacture boast this device as a voltmeter, we tested to read up to 20vdc as the capability of this device. This unit comes with a JST-PH connect to supply power that can range from 4-20vdc.

It is a an excellent choice for installing in cars that use a 12vdc battery. 

The right pushbutton allows you to toggle with the following functions:

1. Time
2. Month and day
3. Temperature reading currently
4. Voltage from supplied source (as voltage that powers the device)
5. Cycle to go through 1-4 

The left pushbutton allows users to change values:

1. First press: minutes
2. Second press: hour
3. Third press: day
4. Fourth press: month
5. Fifth press: year
6. Sixth press: voltage calibration
7. Seventh press: temperature calibration
8. Eight press change the cycle function to do the following: 
   00 – Cycle time, temperature and voltage
   01 – Cycle time and voltage only
   02 – Cycle time and temperature only
   03 – Cycle temperature and voltage only
9. Ninth press change the cycling speed for the cycle function (if you leave it at 0 it will not display any value as it will constantly try to change the functions)
10. We aren’t sure what tenth and eleventh press do. But once you press again it will exit the programming mode.