I'm building a little power supply. It's just the standard salvaged transformer, bridge rectifier, LM317 and LM337 kind of thing that can supply a bit over +/- 20V.
I have an inexpensive 30V analog volt meter and I'm wondering if there's anything I should know about connecting it to this power supply to monitor it's voltage?
http://www.ibuyla.com/Product/93769...suring_DC_voltage_meter_30V_DC_voltage_meter/
If I measure the resistance between the + and - terminals of the meter I get 27K so it seems strange to me that I could simply connect this meter across the output of the power supply and not have a negative effect on the circuit.
I have an inexpensive 30V analog volt meter and I'm wondering if there's anything I should know about connecting it to this power supply to monitor it's voltage?
http://www.ibuyla.com/Product/93769...suring_DC_voltage_meter_30V_DC_voltage_meter/
If I measure the resistance between the + and - terminals of the meter I get 27K so it seems strange to me that I could simply connect this meter across the output of the power supply and not have a negative effect on the circuit.