Wiring for the digital voltmeter on K40 current regulation pot.
Be careful which Voltmeter you get
@donkjr Voltmeter use 3 wire :
Red is Vin, Bleck is GND and White is Sensor.
Some voltmeter use 2 wire, VIN and Sensor being together.
The two wire versions are not good for one reason : there is a min voltage for it to work.
Let’s say the min voltage is 2.5V, then the Voltmeter will stay off until you set the pot to 2.5V which is 50% of the Laser power.
Using a 3 pin Voltmeter allow you to read the value even if it is 0.01V
Yup sorry I should have mentioned to use the right Voltmeter.
Is it possible to use this mini Amp meter in line with the current reg pot to get a digital reading of what mA the "knob is delivering at the current setting? If so, what would the wiring look like?
@donkjr I 've got this one. https://es.aliexpress.com/item/M65-Free-Shipping-DC-100V-10A-Voltmeter-Ammeter-Blue-Red-LED-Amp-Dual-Digital-Volt-Meter/32668484474.html
Could I use your setup to read the pot and the Current?