Summary

Case for a 6-digit digital clock.

Instructions

Searching ebay for "LED clock kit" will reveal many vendors selling kits (circuit board and components) for this 6-digit AT89C2051 based LED clock. The completed clock circuit board fits into this 3D printed housing and is secured with four small wood screws. A clear plastic cover (with holes drilled in the corners for screws, and a hole to provide access to the setting button) is screwed to the case. A hole in the bottom of the case provides room for barrel style power connector, and there's an indent in the side of the case to allow room for the power wires around the side of the circuit board. I got some oddball behavior when I first assembled it, before I realized the power connector at the bottom of the case was shorting with contacts on the back of the circuit board. A thin slip of cardboard between them solved that problem.

Digital Clock Housing