9vdc down to 6vdc after powering a device.

[zemekky]

Okay, the short story is I've got a squarewave synth, only sips at the 9v battery that powers it.

I'd really like to house it inside a bent delay that takes 6v. So, I'm assuming I need a 9v adapter, I'll get one at a full amp just to be safe, but I need to bring down the voltage after it powers the squarewave so it uses the same power adapter.

Help me, help me, help me. I'd prefer not to build a full circuit to make this happen, but I guess I can if it's really the best way. Is there a certain amount of resistance I can put before the power where it goes into the 6v device?

[expanoncolin]

So the bent delay uses 6V?  What's the square wave synth, are you sure it can't run on 6V? - that would certainly be easiest.  Otherwise, you'll need a 6V regulator and a couple of capacitors to step down the 9V to 6V.

-Colin

[zemekky]

The synth is the photo-theremin from Electronics Goldmine. I'll try running it on 6v.

This is the guy: http://www.goldmine-elec-products.com/prodinfo.asp?number=C4164

[expanoncolin]

What's the chip?

-Colin

[ve3wwg]

If you really want to make the supply voltage lower, just string some rectifier diodes in series (1+A diodes).   Each diode will drop the voltage by about 0.6 volts without wasting energy like a resistor would. It's also a consistent voltage regardless of load, unlike a resistor drop solution.

[expanoncolin]

If you really want to make the supply voltage lower, just string some rectifier diodes in series (1+A diodes).   Each diode will drop the voltage by about 0.6 volts without wasting energy like a resistor would. It's also a consistent voltage regardless of load, unlike a resistor drop solution.

That's a better solution!  Didn't think of diodes.  You could also use a properly rated zener diode, or LEDs, so that you wouldn't have to have as many in series (both of which have larger voltage drops than silicon diodes).

-Colin

[ve3wwg]

I didn't think of that,

but yes- LEDs do have larger voltage drops. However, you'd want to make sure that they handle the total current that you want.