| Electronics > Beginners |
| Pulsing Vacuum Fluorescent Display |
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| Electro_Jr:
I do not have a variable DC power supply. Can I just use a 9V battery? |
| sarahMCML:
Hi again, --- Quote from: Electro_Jr on December 03, 2018, 06:02:30 pm ---I do not have a variable DC power supply. Can I just use a 9V battery? --- End quote --- If you're responding to my idea in reply of 27th November then yes, you could use a fairly beefy 9V battery (a PP3 probably won't cut it!), in series with a wire wound potentiometer of about 100 ohms. Start with the pot at maximum resistance setting and gradually reduce until you see the filament glow visibly red, as I stated before. But be very careful to check that you do start from the high resistance setting! Regards, Sarah. |
| james_s:
Depending on the size of the display, a standard 9V "transistor radio" battery will probably work, although it's not likely to last long. NiMH rechargeable types can supply quite a bit more current. |
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