Hello I am new to VFD tubes and i am trying to build a custom watch with one of these tubes with a light sensor but im having trouble finding a way to power these tubes in such a small build
I am looking for a way to power and control the DM-160 tube with a light sensor but i need to find a power supply first
I am looking for a way to power and control the DM-160 tube with a light sensor but i need to find a power supply first
The only thing I can think of that wouldn't be wasteful and bulky is to run it from 4 A23 batteries in series for 48V (datasheet says 50V, close enough) but that still leaves the 1V filament which could run from a AA battery and a dropping resistor.
A23 battery - Wikipedia
A23 battery - Wikipedia
The only problem i have using the A23s is the casing. I molded it off of a 2 inch prototyping board and its slightly larger than 2.15 inches. Although i could try to fit the A23s but itd be a very tight fit
Plus the dm160s i have i cant clearly distinguish the pins but i have found the filament leads but i dont know which one is anode or cathode
Plus the dm160s i have i cant clearly distinguish the pins but i have found the filament leads but i dont know which one is anode or cathode
0,5mA is required for each VFD tube. Any low power rail-to-rail oscillator followed by a voltage multiplier will do the job. A single 3V coin cell, two smd transistors (or a low power oscillator chip), a few diodes and multilayer smd ceramic capacitors is all you need. A creative placement of the ground will provide the -3V bias.
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