# Can I use a 12V power supply on a 9V?

## Can I use a 12V power supply on a 9V?

You can’t use a 12V adapter to power a 9V guitar pedal. A pedal that only handles 9V can be destroyed by using a 12V adapter. It’s possible for a power supply to ruin your pedal even if you get the voltage right.

### Can I plug 9V into 5V?

A 9v to 5v voltage regulator can be implemented with an LM7805 step-down voltage converter. It is used for (10mA to 1 Amp and more) medium to the high current application. The unique about this circuit is its ability to provide the same output current as applied at the input end.

#### Can I charge 6V battery with 9V charger?

Yes, you can, but you need to drop the voltage so that the 6V battery does not over charge. Either a resistor or an Inductor with enough resistaance will do the trick. But you need to know the size of the battery, and the current that the charger pushes out.

Can I use 6V instead of 5V?

You could convert the 6V adapter to 5V if you’re comfortable with electronic circuits. This can be accomplished by hooking up the output of the adapter to a simple 5V linear regulator, which will probably have a dropout of 200mA.

Does amps matter on a power supply?

No, amps do not have to match, but the power supply or charger must be able to supply enough amps as required by the device being powered or charged. In practical terms, that means the amperage rating of a power supply or charger must match or exceed that required by the device it is connected to.

## Can I use 4.5 V instead of 5v?

They’re very stable on the output voltage and can kick out an amp or so. It’ll work fine.

### What happens if you use 9V instead of 5V?

The problem with supplying this with 9V is that the current through the circuit would be theoretically near infinate and, as FullFrontalNoodly said, in real life will destroy the circuit very fast. This is because voltage is pressure, like triffid said. A 5V circuit, like a couple LEDs, would leave 4V.

#### Can a 12V power a 5V?

A voltage regulator 12v to 5v dc can also be implemented with an LM7805 linear voltage converter. It is used for (10mA to 1 Amp ) medium current to the high current applicational circuits. The source voltage must be >2.5V more than the required regulated output dc voltage.

Can I charge 2 6V batteries with a 12V charger?

For example, you can connect two 6V batteries in series with a 12V source to recharge them. This works because, in a series circuit, current has only one direction or path to take, and, as a result, it remains constant throughout the circuit while the voltage changes with each battery connected in series.

What happens if you charge a 6V battery with a 12V charger?

This will run your battery dry and create a thermal runaway scenario, which is very dangerous. Again, some people use a 12V charger to get their 6V battery jump started, but it is never advisable to use a 12V charger to try to fully charge your 6V battery.

## Can I use 4.5 V instead of 5V?

### Can I use a 6V adapter for 12V?

– Yes, they are likely interchangeable even though voltage is not the same. This is because the voltage difference is within specs, and I am GUESSING you could go even higher or lower in voltage.

#### Can you put a 9 volt battery in a 7.4v battery?

It’s not recommended, but might be ok. 7.4V Lithium batteries actually span a 6V to 8.4v voltage range depending on state of charge of the battery. So you’re putting 9V into a device that is definitely designed for wide-input voltage, up to 8.4V.

What happens if I put a 9 volt in a device that requires 7?

The down-side to using a 9V is that they do not have the current density like that of a LI battery. You may need to buy several to keep your device operating. Diodes drop .5 Volts to .7 Volts apiece.

Is it okay to use a power supply that provides slightly more voltage?

This doesn’t mean your device will consume 3.42 A when its powered with this adapter; it is only an indication of the maximum current that can be drawn through the adapter by any device that it is connected to, above which the adapter gets damaged. Any device will only draw as much current as it needs, so long as its power source can supply it.

## Can a 9v battery be used in a DC adapter?

The TENS unit with 9v battery doesn’t have terminal posts like a normal 9v battery installation. The product is exactly what I was looking for. The connection mid-wire really helps in my application. The only reason I didn’t give it five stars is that I haven’t used it long enough.