hypothetically if i connect the base of a tip110 transistor to a 1 ohm resistor and the base recieves input from an arduino uno, any possibility, the tip110 transistor will get damaged?

 

More likely the arduino will get damaged due to the high current.

 

but on another forum someone said the output pin of an arduino generates, almost no current, so where is the high current coming from?

 

What are you trying to do?

Here is an example of how to drive high current loads from Arduino.

 

the output pin of an arduino uno sends signals to a tip110 transistor, which turns an electric motor on and off, and the electric motor pulls on a wire, which raises or lowers an arm. i don't know what value of resisor, to connect 1 end to the output pin of an arduino uno and connect the other end to the base of a transistor. i am using a mabuchi 555.

 

but on another forum someone said the output pin of an arduino generates, almost no current, so where is the high current coming from?

this might be a misunderstanding or mistake. The output pins are not able to sustain current over 20 mA for any extended time, in fact you should read the ATMEGA328 datasheet.

a 1 Ohm resistor connected to the base of a transistor with no other biasing would burn out the output pin. It does not limit current.

I can only guess at what was meant.

 

what resistor value should i use?

 

Please draw a circuit diagram so we can be on the same page, please include the entire circuit including power supply and what you intend to switch.

it sounds like you need more than a transistor, you may need an H bridge so it’s reversible.

 

Here is a schematics

 

So what value of resistor should I use?

 

The battery for the transistor has no voltage and the motor has no voltage or current ratings.
Then nothing can be calculated.

 

I forgot the resistor and the information you mentioned.

 

 

The motor has a voltage rating of 12 volts. I already mentioned I am using a 555 mabuchi motor

 

You should put the motor on the collector of the transistor, and the base resistor should be calculated to provide 1/10th of the needed motor current.

You will probably want to use a Darlington, or a MOSFET.

Ok I see you are using a Darlington, in that case you might get away with a 1k resistor.

 

The rated current of a mabuchi 555 motor is 2 amp. The no load current is 180 milliamp. The stall current is 11.8 amp.

 

You should put the motor on the collector of the transistor, and the base resistor should be calculated to provide 1/10th of the needed motor current.

Why not the emitter side I really want to know?

 

Because if you place the load on the emitter it becomes a follower instead of a switch.

 

When a load is connected to the emitter then the load gets about 2V less voltage than the base voltage. The motor gets only 3V or less. The darlington transistor gets VERY hot.

 

Why not the emitter side I really want to know?

Because you will have to bias the base with a voltage that is higher than the voltage on the load.
If the motor is on the collector and the emitter is grounded you only need less than 1V to turn on the transistor, independent of the supply voltage.