Voltmeter and on off switch wiring diagram

[nemoishouse]

Ok so I'm building my second box and decided to have a voltmeter and an on/off switch but unsure how to wire them. Anyone have a diagram for this or know where I can find one?? Thanks


Nemo

 

[Uncletattoowhat]

 

[Dampmaskin]

An on/off switch for the voltmeter, or for the whole mod?

 

[nemoishouse]

The mod itself.


Nemo

 

[Uncletattoowhat]

try this one.

 

[rurwin]

One terminal of the switch is connected to the battery positive. Everything else that would normally connect to the battery instead connects to the other terminal of the switch. If you want to measure the voltage of the battery, connect the voltmeter negative terminal of the meter to the battery negative and the positive to the switch terminal where everything else connects.



Edit: although that would require a switch that can take the full current that you'll be pulling from the battery. The diagram below from gandymarsh shows how to do it with a MOSFET and only needs a small switch.

 

[nemoishouse]

try this one.

For some reason I'm not seeing your pics. Might be cause I'm on my phone. I'll log in to the website later and check it out. Thanks


Nemo

 

[gandymarsh]

Does this help?

 

[nemoishouse]

Yep that will work! Thanks [emoji6]


Nemo

 

[nemoishouse]

One terminal of the switch is connected to the battery positive. Everything else that would normally connect to the battery instead connects to the other terminal of the switch. If you want to measure the voltage of the battery, connect the voltmeter negative terminal of the meter to the battery negative and the positive to the switch terminal where everything else connects.



Edit: although that would require a switch that can take the full current that you'll be pulling from the battery. The diagram below from gandymarsh shows how to do it with a MOSFET and only needs a small switch.

I will def be using a mosfet


Nemo