Blog » Magic Eye VU meter!
Posted on 1292278578|%A: %d %B, %Y|agohover
I got this cheapo Chinese 6E2 magic eye module in the mail this morning. It works great!
There is a kit that has an integrated rectifier for 220VAC power. I didn't get that one. I got the DC kit, and instead of AC input, I made an all-DC power circuit that takes 6.3V input to drive the filament, and also drives a boost converter to 200V to power the target and the triode. That way, I can make a nice little box for it that plugs into a wall wart without having to fuss with AC power and regional standards and all that.
Update: The tube really likes 300V a lot more than 200V. I'm redoing the power circuit to accommodate.