Join the Discussion on 9V Battery Amperage and Voltage at our Technical Electronics Forum

Question

I have a modest question: What intensity (how many amperes) is a 9V battery and ? [_P_]

Artur k. · Accepted Answer

Only that at the voltage on its terminals = 0V Besides, why measure the short-circuit current of the battery? About the topic: My friend Andrzejlinda someone wrote that you need to make a voltage stabilizer on the LM7809 chip, is it so difficult to enter in the search engine and search, I'm skipping the fact that if you enter the password 9V power supply you will find a lot of results. Here is the second out of 120: Think !! it does not hurt Regards

Błażej · Answer

In an open circuit, which is the battery itself, NO current flows and in that case there is NO current! The current appears only after connecting the receiver. The battery has a current capacity, i.e. a parameter that determines the maximum current that can flow in the circuit. in the case of a 9V battery, this is a rather negligible current.

Andrzejlinda · Answer

and if we connect an ammeter there

Added after 2 [minutes]:

Alternating current of varying intensity flows through the transformer.
Is it possible to lower the voltage in the "12V/0.5A Ts 6/63/2" transformer so that it can work with
http://www.sklep.avt.com.pl/go/_info/?id=32176

_PREDATOR_ · Answer

I moved from Upload projects, programs, articles .

Błażej · Answer

The ammeter must NOT be connected in parallel to the power supply!!! NEVER!!! Dude, go back to school and read up on: DC, AC, voltage, current, power, voltage stabilizer and other BASIC topics.

jaglarz · Answer

Can be. Look for a diagram of a 9V stabilizer, e.g. on the 7809 chip. M.J

CHACA · Answer

You can easily power this system from a 9V battery.

yokoon · Answer

How do you measure the short-circuit current? Short-term connection of the ammeter in the range of e.g. 10A to the above-mentioned battery will not damage the device and we will read the short-circuit current, which will be about 1.5A with the 6F22 battery. I just made this measurement. Of course, I am not talking about current measurements from sources with high current efficiency, e.g. 230V network.

Andrzejlinda · Answer

I'm talking about the transformer, not the battery.
I can buy a 9V transformer but it costs about PLN 15 + 15 for shipping, and I have this transformer and I want to reduce the voltage so that it is as efficient as a 9V battery.
Is there a schematic for such a converter?
And in this topic, I was just wondering if such a transformer with an inverter would not burn the system I want to make.

Andrzejlinda · Answer

Artur k. thx. Added after 32 [minutes]: Thank you too.

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