Core board power question

MIDIbox HUIs
1

Connection to the powersupply. Either the output of a 7V-10V transformer, or a wall adapter can be used. 500 mA is recommented, especially if a backlit display is used, but MIDIfilter and MIDImerger work also with ca. 100 mA. AC or DC doesn’t matter, since the rectifier behind J1 converts to DC anyhow. Also the polarity has not to be taken into account.

Ok.. so I have a 9V 3A bench supply. Is that ok? Does it matter that it’s 3A compared to the recommended 500 mA?

Also the polarity has not to be taken into account.

This means connecting black or red either way round is fine right?

Just being careful :slight_smile:

2

Ok.. so I have a 9V 3A bench supply. Is that ok? Does it matter that it’s 3A compared to the recommended 500 mA?

The current (amperage) rating of your PSU is a maximum rating and states how much current it’ll allow to be drawn from anything that’s hooked up to it. It’s a maximum rating. As you know from ucapps, you’ll most likely not use more than 500mA = 0.5A. So, your PSU has about 2.5 Amperes left, which is good :wink:

This means connecting black or red either way round is fine right?

Yes. Just be sure to connect it to the right pins on you core :wink:

3

many thanks nILS :slight_smile:

J1 all the way!