| Author |
 Topic  |
|
|
Laurie
Double Platinum Member
Canada
4854 Posts |
|
|
sp-1
Platinum Member
Germany
1454 Posts |
 Posted - 12/11/2008 : 15:43:15
|
| Interesting, nice samples, I wonder how it sounds with guitar. |
 |
|
|
Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 12/11/2008 : 15:52:05
|
quote:
Originally posted by sp-1
Interesting, nice samples, I wonder how it sounds with guitar.
Hi SP-1
I must be getting old, as I was unable to find any samples on, any of his links.
Or maybe they just don't show up in FireFox 3.x?
Eveyhere I looked it said samples = 0 of 0 samples.
Regards Dr. Bob |
|
|
|
DeFrag
Moderator
USA
3409 Posts |
Posted - 12/11/2008 : 16:01:47
|
I'd like to make one of these. The circuit is dead simple.
"Now, as we turn the potentiometer, we increase the resistance between the battery and the circuit, thereby lowering both the current and voltage."
Do both the voltage & current drop?
I would think according to Ohm's Law V=IR as the resistance increases & a fresh 9V battery maintains near 9V, only the current goes down.
What am I missing here? |
Edited by - DeFrag on 12/11/2008 16:14:26 |
|
|
|
Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 12/11/2008 : 16:11:25
|
quote:
Originally posted by DeFrag
I'd like to make one of these. The circuit is dead simple.
"Now, as we turn the potentiometer, we increase the resistance between the battery and the circuit, thereby lowering both the current and voltage."
Do both the voltage & current drop?
I would think according to Ohm's Law V=IR as the resistance increases & a fresh 9V battery maintains near 9V, only the current goes down. What am I missing here?
Some of the voltage drops across the pot... so the voltage applied to the circuit board is 9V minus the drop across the pot.
I'd be really careful with this simple circuit - normal pots are only rated at maybe 0.5 Watts. If there was (say) a 4.5V drop across the pot at the half-way point (maximum power transfer), the maximum safe current through the pot to the circuit board would be only 20mA. Any more than that and the pot would fry. Actually ignore all this... it would be worse right near the minimum resistance... can't work the numbers out quickly in my head, but it would be much better to use an industrial size pot.
Better to use a 2W wirewound pot (or maybe that's what the circuit calls for). |
Edited by - Laurie on 12/11/2008 16:30:55 |
|
|
|
sp-1
Platinum Member
Germany
1454 Posts |
Posted - 12/11/2008 : 16:55:10
|
quote:
Originally posted by Dr. Bob
quote:
Originally posted by sp-1
Interesting, nice samples, I wonder how it sounds with guitar.
Hi SP-1
I must be getting old, as I was unable to find any samples on, any of his links.
Or maybe they just don't show up in FireFox 3.x?
Eveyhere I looked it said samples = 0 of 0 samples.
Regards Dr. Bob
Mmmmm, I can see the samples right between the text and photos on the ebay link. Maybe it has something to do with firefox indeed, but I'm no expert.
|
|
|
|
Brutalitarian Supremacy
Silver Member
USA
270 Posts |
Posted - 12/12/2008 : 06:02:36
|
| on the SKB Stage Five pedal board you can set your power outlets (all 12!)a little lower in voltage to give it that drained sound(big selling point for me)...and it's got a cable tester to boot |
|
|
|
DeFrag
Moderator
USA
3409 Posts |
|
|
zerksies
Double Platinum Member
USA
3406 Posts |
Posted - 12/13/2008 : 00:23:08
|
| i dying battery produces the same effect |
|
|
| |
Topic |
|
Voltage starver
