Easyvibe Power Options

[hendrix2489]

Hey guys, i just need a little help with my easyvibe.  I just finished my easyvibe over the weekend and it sounds awesome.  I power it right now with a battery.  I was wondering how i would power it with a dc jack.

[hendrix2489]

could i just power it regulary according to the switching diagram or do i need a transformer or regulator of some sort.

thanks in advance

[GibsonGM]

A few options, Alex.  My EV ate batteries, too ;o)
You can get a 9V wall wart that is regulated (important), so it's putting out about 9v with no load when you plug it in and measure the voltage.  Most are not regulated, so they put out too high a voltage with less than a few 100mA on them.    Then just add your DC switching jack from small bear or RS, make sure it's wired right, and away ya go.   There are tricks to add a load to an unregulated supply for just one effect, to bright the resistance up and voltage down, but they aren't really worth it IMHO.

To make your own, you'd need a WW putting out like 14V.  You can then run this to a 9v regulator circuit (google LM7809), and permanently install the ckt in the vibe.  But then you can't use batteries again without switching the reg. circuit out.  A pain in the a$$, and probably not lots of room in the vibe for another circuit.

I paid $40 delivered for a Godlyke power supply on Ebay, can power up to 20 effects, is small and handy, and uses the regular Boss-type center negative switching jacks available anywhere.  No problems, and now no batteries on my board anymore :oD   But I could still use them in an emergency if I had to (like at an outside gig or something).

[hendrix2489]

i do not know for sure, but i use a 1spot power , do you know if that would work

[Bucksears]

I'm using a Godlyke Powerall with mine and it works fine............now.
I was getting a hot cap for a while (near the 9V input), but seems to have gone away.

I LOVE this circuit.

- Buck

[hendrix2489]

how can you tell if it regulated, i know on godlyke site  it says theirs is, but i don'e see anything on Visual Sounds website

[stumper1]

The OneSpot is regulated.

[hendrix2489]

i need some help then,  i hooked up a dc jack to the circuit board and it seems to work,
but over 5-10 minutes the  effect completely fades away leaving me with regular bypass effect.  if i unplug and plug the powersupply back in i get the full effect again.  but over time it fades away.

[hendrix2489]

i also tried a boss power supply but to no avail, and it fades away just liike the one spot(about 5-10 minutes).

I will try a battery when i get home to see if that works.  I only tried it with a battery to see that is worked correctly so i had only tried for a minute or two

does anyone know why that would happend, maybe it the ps

[hendrix2489]

 
i tried the pedal with the battery, worked fine and then 5-10 minutes later it went away. 

[GibsonGM]

If your power supply was unregulated, you could have fried a cap or 2....hopefully the caps in there were rated 16v or higher!   
Here's the deal:  a power supply might say "9V 300mA".  That means it will 'sag' from an open voltage of around 14-16v down to 9V when there is a load of 300mA presented to it.   All you have to do is plug it in and measure the voltage at the tip.   If it's like 16V from a 9V unit, it's not regulated.    If you then connected a 30 ohm 5W resistor to the + and -, and measured it, you would find it at 9V, because it is seeing a 300mA load.

Regulated units have a regulator (naturally) right inside them.  The Godlyke PA (which I really like a lot) is regulated, so if the load goes up or down it will still put out 9V (that's what the LM7809 regulator would do, too).

2.  Your last post isn't that clear.   With no power supply plugged in, and a battery in there, does the vibe work? If not, the DC jack is wired wrong or you fried something!   I find a good way to test the jack is to put battery in, use effect, and plug in a dummy power cord to the DC jack (open, don't connect the wires together!).  I always do this before ever plugging in a power supply + battery.   If the effect goes off, all is well.    If yours was wired wrong, you could actually have put the PS voltage PLUS your battery voltage into the ckt, over 18-22 volts!!!  The fact that you say it worked at all for 5-10 mins is a good sign, but more information, please?

)  You'll get it working, don't worry.

[hendrix2489]

1. i checked it and it is around 9-9.8v, according to Deric the 1spot is regulated.

2. with the dc jack disconneted and the battery connected the vibe works(for ten minutes and then fades away leaving regular tone.)  with the power supply it is the same thing. 

[hendrix2489]

could it be a ground somewhere?

[zhx]

Did you ever get it fixed? Seems that I have the same problem. Works for a while, but then the lfo stops oscillating. Disconnecting power brings it back for a few seconds, but then it goes away again.

[Jim Jones]

Which layout did you guys follow to build your Easy Vibes?  I've read about a lot of problems with this circuit and I'm surprised.  I used RG Keen's layout and haven't had any difficulties...

Jim

[R.G.]

could it be a ground somewhere?

Yep.

[zhx]

I'm using this one:
http://www.aronnelson.com/gallery/main.php/v/slackers-stuff/easyvibeboard_final.jpg.html

Could it be excess voltage put out by the 1spot (I use it too)? Maybe a series resistor there (10K)?

Oh, by the way, when the lfo stops oscillating I still get the stationary out-of-phase sound. So the cap network side of the circuit works fine.

[Jered]

  Hi guys, I've got a quick question. What was the resistance of the LDR's you guys used?
  Thanks, Jered

[zhx]

At local electronics store 6 months ago:

Me: "Hi, got any LDR's?"
Clerk: "I'll check, just a moment." (wanders off between the shelves - returns) "Here, that's 4 €, please."
Me: "Thanks."

Sorry, just amusing myself.
I have no idea of their resistance, but I guess pretty much anything works.

[Jered]

  OK cool. So any from 4K to 1M should work as long as they are all the same? Easy enough. Thanks.
  Jered