Your build looks great, you do good work.coi2001 wrote:mictester wrote:That's a really nice build!coi2001 wrote:I was wondering what people do for power supplies for univibe-type projects. Has anyone tried running it on 9V power supply and using a voltage doubler and a 15 V regulator?
Power for it - I always mains power them, using a 15 VA 15V AC secondary transformer, a little 5A bridge rectifier, 2200µF 35V smoothing capacitor, 7815 regulator with 100nF bypass capacitors at the pins (on both input and output) and a 1000µF 25V supply filter capacitor.
You could use a voltage multiplier, but the little 7660S and so on would not really be powerful enough to drive this current-hungry pedal. You'd have to use something more sophisticated.
Thank you, the power consumption of my build if 24-31 mA, depending on the speed-intensity setting, but I see you point of not messing with the voltage doubler and going for a little power supply. It's just that it's another box/adapter to carry.
Do you usually use a wall wart type of transformer and the rectification/power conditioning in the vibe box?
thanks
Costantino
PS: Attached below are photos of the light shield before I painted it black. It's held on the board by three pin connectors that wedge into the inside of the plastic cup lip and keep it firmly in place.
The vibe doesn't need much current to run (depending on your bulb) I always suggest a 22-24VDC/200mA going into your box, and stepping it down with a 15 volt reg, like this:
or for a really quite unit, something like this:
The Forum-Vibe power sections can be run whichever way you want, you can do like the original and use the raw V+ power on the LFO and a simple resistor-cap (470-Ohm/220uF->470-Ohm/220uF) supply, or you can run the LFO off the raw power input and use a LM7815 on the audio section, or you can run both sections with their own regulated supply, it's all there for your choice
The v1 PDF showed a hookup "suggestion" but that was removed from the new rev-2 PDF because it's really supposed to be up to you what you wan't to do. The Forum-Vibe is not a newb build so one is kind of expected to know their way around simple power supply circuits. Many folks already have a PS on their pedal board and just use that.
If you choose to run a single supply, for convienience on the v2 PCB two pads have been added for bridging the two power sections together highlited here for clairity:
It can run off lower voltages but vibes seem to sound best in the 15-24v range.
Again, very nice work.
-Brad