The Ultimate Utility Meter — Part 1
Figure 10. From the underside, the hardware mounting sequence.
Figure 11. The three switches used on the UUM.
screws, so you will have to pick up some 1/2-inch 10/32
machine screws from your home center.
I prefer to use three-inch cabinet handles, shown in
Figure 12. They can be purchased for as little as $1.00
each and come with mounting hardware.
I used two one-inch spacers on the front and two one-inch and two 5/8-inch spacers on the rear. This will give
the meter a nice slant that will make it much easier to use.
The spacers shown in Figure 13 can be purchased from
Using four #4 3/8-inch machine screws, attach the four
one-inch spacers to the top panel. Attach the two 5/8-inch
spacers to the two spacers at the rear, as shown in Figure 10.
Mount the Universal LCD Carrier on the LCD, as
shown in Figure 10. The carrier must be plugged into the
header and fitted over the two front one-inch #2 machine
screws. Once attached, hold it in place with a couple of
nylon washers and lock nuts.
All components are in place, and it’s time to jumper a
few of the headers. You can solder wires to the headers if
you wish, but I prefer to take the time and make actual
jumpers. The jumpers can be removed later, if necessary,
to allow updates and changes to the hardware.
To make a header jumper, you need to use a female
header. I use snapable headers and remember to cut the
header so you have the correct number of pins.
Strip the end of the jumper wire. I like using ribbon
cable so I can peel off the number of wires needed. Place
a piece of 1/4-inch-long heatshrink on the ends as shown
in Figure 14.
Solder the wires to the header and slip the heatshrink
over the connections. Apply some heat and you have one
end of your jumper.
I will list each jumper used to connect the various
switches and carriers to each other. The jumper locations
have been highlighted on the schematic in red. I have
included a picture of the actual jumper locations in Figures
16 through 18.
M3 ————————— H1
M2 ————————— H2
Solder two wires to the SPST switch. Connect the
Figure 12. Handles are attractive and cheap.
Figure 13. Use spacers for a slanted look.
Figure 14. Heatshrink the ends of the wires.