Description

On PART-1, I described the circuit operation, and the basic program flow. In this new section I will propose a possible "good looking" enclosure build for the device with large back-lit buttons. Here you will also find the links to the PCB, Hex code, Assemby (ASM) code, and the .cdr file for laser cutting the top panel.

Details

Part-1 Video :

This Part-1 video focuses on the circuit operation and basic program flow.

Part-2 Video :

This Part-2 video focuses on a "good looking" enclosure example.

Materials :

Basic materials are:

1)Wood moulding for frame (details later)

2)Acrylic buttons (details later)

3)Acrylic top panel (laser cut)

other materials: circuit board & components, bottom cover, 3 AA cell holders, nuts&bolts, screws, varnish, glue etc.

Wood Moulding :

Cross section dimensions of the moulding for the enclosure frame.

Frame Assembly :

Cut 4 sides of frame at 45° angle on ends. Edge where panel rests should be 142 mm long. Glue parts together and hold in place with masking tape. Verify right angles.

Acrylic Top Panel :

Download .CDR (corel draw) file for laser cutting of top panel. Panel is fastened to frame with 8 wood-screws.

PCB Board to Top Panel :

PCB is attached to panel with (4) 1/8" thread, 1.5" length bolts & nuts. Clearance between PCB and panel is 7/8". Use spacers or double nut.

Acrylic Buttons :

Acrylic buttons are cut from 20 mm diameter transparent acrylic rod. Button length is 20 mm. All faces have a frosted finish for light diffusion, except the bottom face where LED light enters which is polished. Drill a 3 mm diameter & 3 mm deep hole on bottom face to fit the switch stem. Use a little silicone glue if necessary.