uk_lefty Posted March 31, 2023 Posted March 31, 2023 I needed a new power supply and picked up what I thought was a bargain... Except it has three banks for 9v 100mA and three for 9v 500mA. On my other power supply almost all slots are for 9v 100mA. I'm checking my pedals, some clearly say 9v 100mA but others don't specify beyond 9v. Am I taking a risk plugging any pedal into 500mA if I'm not sure? Quote
Waddo Soqable Posted March 31, 2023 Posted March 31, 2023 5 minutes ago, uk_lefty said: I needed a new power supply and picked up what I thought was a bargain... Except it has three banks for 9v 100mA and three for 9v 500mA. On my other power supply almost all slots are for 9v 100mA. I'm checking my pedals, some clearly say 9v 100mA but others don't specify beyond 9v. Am I taking a risk plugging any pedal into 500mA if I'm not sure? If I understand correctly a higher Ma wouldn't do any harm, I got a 1000ma power supply that can run multiple pedals, or just one... it was sold with, and as suitable, for a 300ma pedal Quote
uk_lefty Posted March 31, 2023 Author Posted March 31, 2023 Just now, Waddo Soqable said: If I understand correctly a higher Ma wouldn't do any harm, I got a 1000ma power supply that can run multiple pedals, or just one... it was sold with, and as suitable, for a 300ma pedal Ok so it's a minimum requirement rather than a maximum? Quote
Waddo Soqable Posted March 31, 2023 Posted March 31, 2023 1 minute ago, uk_lefty said: Ok so it's a minimum requirement rather than a maximum? Yes, again as I understand it, it would be dodgy to run a 300ma pedal on a 100ma supply ( it would overheat I think) but the other way round, ie a 300ma pedal on a 500ma power supply is absolutely fine.. 4 Quote
Downunderwonder Posted March 31, 2023 Posted March 31, 2023 The draw is the thing. As WS intimated, the supply has to be rated for the draw that is sucking on it. There are lists of power draws for pedals on the internet. 3 Quote
0175westwood29 Posted April 3, 2023 Posted April 3, 2023 On 31/03/2023 at 09:20, uk_lefty said: I needed a new power supply and picked up what I thought was a bargain... Except it has three banks for 9v 100mA and three for 9v 500mA. On my other power supply almost all slots are for 9v 100mA. I'm checking my pedals, some clearly say 9v 100mA but others don't specify beyond 9v. Am I taking a risk plugging any pedal into 500mA if I'm not sure? Your pedals will only take what it needs, so if it needs 30ma it will only draw that much, it could be plugged into a 1000ma supply wouldn’t matter. 3 Quote
fretmeister Posted April 3, 2023 Posted April 3, 2023 Perfectly safe. If you buy any power hungry digital pedals just make sure they get powered from a 500mA output. 1 Quote
lidl e Posted April 3, 2023 Posted April 3, 2023 Just pointing out something i didnt know but looked into. On power supplies with switchable voltage (ie 9/12/18) the mas goes down by a 1/2 or so each time you up the voltage. 1 Quote
Boodang Posted April 4, 2023 Posted April 4, 2023 If your pedal doesn't specify the mA draw it will probably quote the wattage (it'll be mWatts). As Amps x Voltage = Watts then Watts divided by Voltage = Amps Quote
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