First idea / drawing of front panel & button / switch placement.
Front panel is Aluminium 4mm CNC machined gray powder coated with engraving and black infill. Handles chrome plated Hammond 7″ steel rack handles.
Rear and bottom 2mm brushed aluminium
Top / sides 1.2mm Aluminium black hammered paint
Prototyping / testing my idea of Transient display switch on for 20 seconds. Used 555 timer. Relay switching 180V PSU for nixie tubes.
Now board is done (just lettering missing)
– display on / off with SPST switch
– 20s transient display ON with push button
– dimming display with SPST switch. Every Tube anode with 15k drop resistor, Dimming achieved with with pair of 7.2k resistors, bypassed by SPST switch for full brightness. This is lowest value I could get before digits were still able to display in full shape.
Now testing in circuit. still long way to go.
This is my very first project from scratch so I hope all will go well. Hardest part was definitely find out how to start. I didn’t have a slightest clue how to start, just a few months ago.
…Final version of the panel. after many many revisions.
from Schaeffer-AG https://www.schaeffer-ag.de/en/ also know as Front Panel Express http://www.frontpanelexpress.com/ in the US
Design has been sent yesterday for manufacturing. 5-8 days leading time.
350×240 mm 4mm (13 3/4″ x 9 1/2″ x 1/6″) weight approx 2lbs.
CNC machined with Aluminium grey powder coating, lettering and engraving Jet black infill.
Buttons and switches APEM 600 series
This clock is basically tribute / inspired by HP model 571B mechanical clock and late 50, early 60 HP frequency meters, generators and other gear