DIY question

[shawnc]

I have 3 pedals I am working on at the moment, all wired up on the same perf board in series, so that one goes into the next which goes into the 3rd.

 

The 3 pedals are(a 12ax7 simulation of a Marshall input, a lbp boost and a fuzz pedal). All 3 pedals require a 9 volt battery. I currently have only 1 hooked up to the perf board, positive on positive and negative on negative.

 

 

Here is my question:

Do I need to hook 2 more batteries up to the perf board to handle the other 2 pedals that are in series on the board? What would happen if I ran the whole circuit on one 9 volt battery? If I had to hook up the other 2 batteries, would it be the same for each(positive on positive and negative on negative, or would they have to be wired up in series or parallel/

 

thanks for the help

 

Cheers

 

Shawn C

[autopilot]

you can feed the 3 circuits with one Battery/DC jack, just connect all the v+, and the negatives, but check that the ground polarity is the same for the 3 circuits or it wouldnt work.

[shawnc]

 

Originally posted by autopilot you can feed the 3 circuits with one Battery/DC jack, just connect all the v+, and the negatives, but check that the ground polarity is the same for the 3 circuits or it wouldnt work.

 

 

Thanks for the reply. I take it the combination of the 3 effects would just use up the battery 3 times faster?

 

Cheers

 

Shawn C

[mangojeep66]

First, you'de be better off with a AC to DC adaptor with a DC output of 9 vdc and a output current rating of 1 amp to handle the current loading of the 3 devices.

 

Second, you could use 1 9V battery to power all 3 units, but it would die quickly as it's providing current to 3 devices.

 

Third, don't wire 3, 9v batteries in series because this will give you 27vdc; wire the batteries in parallel.

 

last...go to "First" step and save money on batteries.

 

 

hope this helps.

 

 

[MrSage]

 

Originally posted by shawnc Thanks for the reply. I take it the combination of the 3 effects would just use up the battery 3 times faster?

 

Depends on how much power each circuit uses.

 

But yeah...essentially 3 times faster.

[Speeddemon]

I've bumped against your 'issue' as well and it just dawned then that a battery is just out there to keep a certain voltage steady and provide a limited amount of current.

 

a wallwart has an 'unlimited' amount of current, in the sense of that it can't get depleted like a battery can.

 

I once built a very elaborate true bypass box (3 Loops, A/B Inputs and A/B Outputs) which had 10 LEDs !

The guy wanted 1 LED for Loop 1, 2 for 2 and 3 for 3.

With a 9V battery it was very weak and quickly, whereas with a DC wallwart, all the LEDs lit up nicely.

[Narcosynthesis]

Assuming all the pedals are positive ground, then connecting one battery to the +v on each circuit would work fine for powering them all

 

The only problem would be if any of the circuits are positive ground - where the powering is reversed, as this would need a separate supply, the marshall and lpb should be fine, it just depends on what fuzz you have used

 

the pedals use the same power, so it would take the same time to replace the battery three times powering it with one as it would to run flat all three batterys powering them separately (on average, some would last longer/shorter) so really it simplest to use one if you can

 

David

[shawnc]

 

Originally posted by Narcosynthesis Assuming all the pedals are positive ground, then connecting one battery to the +v on each circuit would work fine for powering them all The only problem would be if any of the circuits are positive ground - where the powering is reversed, as this would need a separate supply, the marshall and lpb should be fine, it just depends on what fuzz you have used the pedals use the same power, so it would take the same time to replace the battery three times powering it with one as it would to run flat all three batterys powering them separately (on average, some would last longer/shorter) so really it simplest to use one if you can David

 

 

Thanks for the info. The Fuzz pedal is the the coloursound fuzz and wah, I created just the fuzz side of that pedal. Would this one be a positive ground? It uses 2 npn transistors.

[MrSage]

 

Originally posted by shawnc Thanks for the info. The Fuzz pedal is the the coloursound fuzz and wah, I created just the fuzz side of that pedal. Would this one be a positive ground? It uses 2 npn transistors.

 

That's most likely going to be negative ground, but you'd have to post the circuit to be sure.