# Setting Up a Current Source: Parallel Resistances

• fusion911

#### fusion911

To set up a current source why do we need to place the resistances in parallel rather than than placing them in series.

well I think that's because the current divides in the parallel circuit.

It would be same throughout in the series circuit, so there might be no use for a sonnection in the series. And it also depends on the amount of current needed through the circuit.

I think

fusion911 said:
To set up a current source why do we need to place the resistances in parallel rather than than placing them in series.

Welcome to the PF. Are you asking about Norton and Thevinin Equivalent circuits?

http://en.wikipedia.org/wiki/Thévenin's_theorem

.

fusion911 said:
yes
the very same

Ok, then did the link answer your question? And what do you mean by "set up" a current source? Do you mean in a simulation?

## What is a current source?

A current source is a device that provides a constant flow of electric current in a circuit, regardless of the load resistance or changes in the input voltage.

## Why would I need to set up a current source?

Setting up a current source can be useful in situations where a constant and precise current is required, such as in electronic testing, powering LEDs, or in some types of sensors.

## How do I set up a current source with parallel resistances?

To set up a current source with parallel resistances, you will need to connect the resistances in parallel to the output of the current source. This will ensure that the same current flows through each resistance, as the resistances are in parallel, and the current source will maintain a constant current.

## What are the advantages of using parallel resistances in a current source?

The use of parallel resistances in a current source allows for a more flexible and efficient circuit design. It also allows for the distribution of current among multiple resistances, reducing the load on each individual resistance and increasing the overall reliability of the circuit.

## Are there any limitations to using parallel resistances in a current source?

One limitation of using parallel resistances in a current source is that the total resistance of the circuit will be lower than the individual resistances, which may result in a higher current than intended. Additionally, the use of parallel resistances may also increase the complexity of the circuit and require additional components for proper functioning.