P
Phil Allison
Guest
** Hi,
I ordered one of these on Monday arvo, got it in the mail yesterday.
http://www.ebay.com.au/itm/DIGITAL-DISPLAY-VOLTMETER-VOLTAGE-BLUE-LED-PANEL-METER-0-100V-3-WIRE-gauge-/321055955403?pt=AU_B_I_Electrical_Test_Equipment&hash=item4ac06d19cb#ht_2341wt_677
There was no spec sheet with it and the Ebay page is short on detail and has
errors.
Here are the facts:
The three LEDs are bright blue, 0.56 inch or 14.2mm ( not 0.36 inch).
Panel cut out required is 45.4 x 25.9 mm.
The module operates from 5V upwards, it has a 3.3 V reg on the PCB with a
Schottky diode in series.
Current drain depends on the number of lit segments, varying from 7.5 mA (
display 1.1) to 14.5mA ( display 88.8).
Input resistance is 152 kohms.
The display reads up to 99.9 then JUMPS to 101, so it is auto-ranging !!!
There is a * TINY * trim pot on the PCB for calibration - my example was
spot on.
------------------------
Mine is going to replace a near useless MC meter on the front of my
ariac - 600 kohms plus 4004 diode in series and a 0.47 film cap across the
input converts the display to read AC volts with little error from 20V to
275V.
The smallest 240V / 6V tranny you can find will power the module.
Hundreds of uses ......
..... Phil
I ordered one of these on Monday arvo, got it in the mail yesterday.
http://www.ebay.com.au/itm/DIGITAL-DISPLAY-VOLTMETER-VOLTAGE-BLUE-LED-PANEL-METER-0-100V-3-WIRE-gauge-/321055955403?pt=AU_B_I_Electrical_Test_Equipment&hash=item4ac06d19cb#ht_2341wt_677
There was no spec sheet with it and the Ebay page is short on detail and has
errors.
Here are the facts:
The three LEDs are bright blue, 0.56 inch or 14.2mm ( not 0.36 inch).
Panel cut out required is 45.4 x 25.9 mm.
The module operates from 5V upwards, it has a 3.3 V reg on the PCB with a
Schottky diode in series.
Current drain depends on the number of lit segments, varying from 7.5 mA (
display 1.1) to 14.5mA ( display 88.8).
Input resistance is 152 kohms.
The display reads up to 99.9 then JUMPS to 101, so it is auto-ranging !!!
There is a * TINY * trim pot on the PCB for calibration - my example was
spot on.
------------------------
Mine is going to replace a near useless MC meter on the front of my
ariac - 600 kohms plus 4004 diode in series and a 0.47 film cap across the
input converts the display to read AC volts with little error from 20V to
275V.
The smallest 240V / 6V tranny you can find will power the module.
Hundreds of uses ......
..... Phil