TIL-311 Clock Kit

Description

TIL311 Retro Display Clock Pre-Assembled Kit

Bring a piece of 1970s display technology back to life with this TIL311 clock kit. The TIL311 was one of the first intelligent LED displays ever made. A numerical display with its own onboard decoder logic, originally used in vintage test equipment and computers. This kit puts four of them to work telling time on a clean, compact PCB.

What’s included:

• Fully assembled PCB — all SMD components (ATmega328PB, supporting circuitry, USB-C power connection) are soldered and ready to go.
• ATmega328PB pre-flashed with clock firmware. No programmer needed.
• Easy through-hole soldering required for: TIL311 displays and coin cell battery holder  (for backup timekeeping)

What you’ll need:

• 4x TIL311 displays, not included. DS1417 will work too.
• USB-C power adapter (not included) — powers the clock during normal operation

Specs:

• Board dimensions: 72mm x 40mm
• Power: USB-C (5V)
• Backup power: CR2032 coin cell keeps time during power loss
• Microcontroller: ATmega328PB, pre-flashed
• Four Mounting holes to mount the PCB onto whatever you want.

Open Source
This is a fully open source hardware design — schematics, PCB files, and firmware are freely available.
🔗 [Link to repository]