I'd like to preface by saying k know little to nothing about electrical engineer but would like help with making a lamp. I want to use a volt meter style gauge to display a different reading for a light based on how bright it is using a dimmer switch. I'm assuming it's not as easy as simply wiring the meter to always read the current after the switch and wanted to see if anyone could help me. Any input would be appreciated.
if you just want a "a different reading" depending on how the dimmer is set, just connect a simple AC voltmeter in parallel with the lamp,
With SCR type dimmers the voltmeter will not accurately track the amount of power going into the lamp but it will casnge according to the dimmer setting.
basically you put a bridge rectifier around the movement of a dc voltmeter and put a high voltage resistor in series with the input, be sure to insulate everything well.
these ones have that construction internally,
With a 300V range they are well suited to 230V operation, but for lower voltages the needle won't visit most of the scale, they can however be opened and modified - eg: you could reduce the resistor to make the needle travel further