1. Getting Started With Your TCD Kit

The Parts

Assembly of the CircuitSetup Time Circuits Display kit is fairly straightforward. Before you start, make sure you have everything you need.

Your kit should include:

3 segment displays: red, green, and yellow
ESP32-based control board
TRW-style number keypad assembly (this will be disassembled so the number keys, PCB, and rubber backing can be reused)
Display gels: red, green, and yellow
Mounting hardware:
- screws for mounting the display enclosures to the outer enclosure
- screws for mounting the display PCBs in their enclosures
- speaker mounting screws
- keypad mounting screws
- 4 small screws for mounting the keypad PCB to the bezel
Connection wiring:
- 3 JST-XH 4-pin cables for the display I2C connections
- 1 JST-XH 7-pin cable for the keypad
Square keypad LED lenses: 2 white and 1 red/amber/green set
Small 4 ohm, 3W speaker
Display stickers

If your order included 3D-printed parts or aluminum enclosures, you should also have:

If you are printing your own parts, see the current printable-part list in the printable parts README.

Phillips screwdriver
Thin double-sided tape for adhering the display gels to the faceplates and the faceplates to the display enclosures
X-Acto knife or sharp scissors for cutting out the faceplate sticker labels
Flush cutters like these, or a 2.5 mm (3/32") drill bit, to disassemble the keypad
3 mm (1/8") drill bit to make holes for the 4 AM/PM and Hour/Min LEDs in the display gels
Cordless drill
A power supply capable of at least 1000 mA output. The TCD can be powered from a desktop computer USB port or a phone charger with a Micro USB cable. It can also be powered through the green screw terminal with 6-20V DC.

If you plan to paint 3D-printed parts:

There are several ways to smooth 3D-printed parts, but the recommendations below are for the traditional fill/sand/paint method.