4. Replace Meter Scales

4.2. Cut Scales Out

Use scissors or a hobby knife to cut out the new meter scales.


4.3. Remove Meter Cover

Remove both screws holding the cover and remove it.


4.4. Remove Screws Holding Scale

Remove both screws holding the existing meter scale.


4.5. Use Screw to Enlarge Holes

Use one of the meter screws to enlarge the mounting holes in the new meter scales.


4.6. Install New Meter Scale

Carefully slide the new meter scale under the needle.


4.7. Replace Screws Holding Scale

Replace both screws holding the new meter scale. If the new meter scale does not lay flat, use a small bit of glue stick on the back of the top corners.


4.8. Replace Cover

Replace the meter cover.


4.9. Replace Screws Holding Cover

Replace both screws holding the meter cover.


4.10. Minute Meter

Repeat the process to make the Minute meter.

5. Assemble Clock PC Board


5.1. J1 ICSP Connector

Place and solder the 6 pin ICSP connector in the area labeled J1. Use tape to temporarily hold it in place if needed.


5.2. USB Connector

Place and solder the micro USB connector to the back side of the PC board in the area labeled USB.


5.3. F1 500ma Polyfuse

Place and solder the 500ma Polyfuse in the area labeled F1 and Trim the excess leads flush with the PC board.


5.4. HOUR and MINUTE Tactile Pushbuttons

Place and solder the time adjust buttons on the back side of the PC board in the areas labeled HOUR and MINUTE.


5.5. B1 Battery Holder

Place and solder the batter holder in the area labeled B1.


5.6. Battery

Insert the Battery into the Holder.


6. Programming

6.1. Connect ICSP Programmer

Connect the ICSP Connector to a ICSP Programmer like a USBTiny or another Arduino as show on the Arduino Website <a https://www.arduino.cc/en/tutorial/arduinoISP


6.2. Burn Bootloader

Use the Arduino IDE to burn the Arduino Leonardo bootloader.


6.3. Disconnect Programmer

Once the bootloader is programmed, disconnect the PC board from the programmer.


6.4. Connect USB Cable

Connect a USB Cable from your computer to the micro USB Connector on the PC board.


6.5. Upload Clock Program

Use the Arduino IDE to upload the panel_meter_clock2_1 sketch.


The clock time will be set to the current time of the computer used to upload the sketch.

The NeoPixel on the PC board should light and start to change colors. If the NeoPixel does not light up, go back, and check your solder connections for shorts or other issues.


7. Final Assembly


7.1. Install Spacers

Place a M3 hex nut on both of the meter input screw terminals on the back of each meter. These are used as spacers to set the distance of the PC board to the rear cover of the case.


7.2. Install Hour Meter

Insert the hour meter into the hole on the left side of the front case.


7.3. Secure Hour Meter

Secure the meter in place with a flat washer, a split washer and a M3 hex nut on each of the meter’s mounting studs. Needle nose pliers or Tweezers may be useful here, since there is not much room.


7.4. Repeat with Minute Meter

Repeat the process with the minute meter.


7.5. Secure PC Board

Secure the PC board to the back of the meters with four M3 hex nuts. The micro USB connector and tactile buttons should be facing out to the rear of the case.


7.6. Rear Cover

Place the rear cover on the case.


7.7. Snap in Place

Snap the rear cover in place.


7.8. Secure Cover

Secure the rear cover with four M3 x 10mm flathead screws. Do not overtighten.


7.9. Configure the Clock

To configure the clock connect a USB cable between a computer and the clock.