# Source: https://learn.adafruit.com/force-sensitive-resistor-fsr/connecting-to-an-fsr.md

# Force Sensitive Resistor (FSR)

## Connecting to an FSR

Because FSRs are basically resistors, they are non-polarized. That means you can connect them up 'either way'a and they'll work just fine!FSRs are often a polymer with conductive material silk-screened on. That means they're plastic and the connection tab is crimped on somewhat delicate material. The best way to connect to these is to simply plug them into a breadboard.![force___flex_FSRbb.jpg](https://cdn-learn.adafruit.com/assets/assets/000/000/431/medium640/force___flex_FSRbb.jpg?1396762959)

or use a clamp-style connector like alligator clips, or a&nbsp;female header.![force___flex_fsrhead.jpg](https://cdn-learn.adafruit.com/assets/assets/000/000/432/medium640/force___flex_fsrhead.jpg?1396762967)

or a terminal block such as&nbsp;[Phoenix #1881448](http://mouser.com/Search/ProductDetail.aspx?qs=sGAEpiMZZMvXvCN7QvKasXNwb4IufXV%2fCdHopRH7bbg%3d)![force___flex_fsrterminal.jpg](https://cdn-learn.adafruit.com/assets/assets/000/000/433/medium640/force___flex_fsrterminal.jpg?1396762972)

It is possible to solder onto the tabs but&nbsp;_you must be very fast_&nbsp;because if your iron is not good quality or you dally even a few seconds, you will melt the plastic and ruin the FSR!&nbsp; **Don't attempt to solder directly to your FSR unless you are absolutely sure you have the skills to do so.** - [Previous Page](https://learn.adafruit.com/force-sensitive-resistor-fsr/testing-an-fsr.md)
- [Next Page](https://learn.adafruit.com/force-sensitive-resistor-fsr/using-an-fsr.md)

## Featured Products

### Round Force-Sensitive Resistor (FSR) -  0.3 ~ 10 Newton Force

[Round Force-Sensitive Resistor (FSR) -  0.3 ~ 10 Newton Force](https://www.adafruit.com/product/166)
FSRs are sensors that allow you to detect physical pressure, squeezing and weight. They are simple to use and low cost. This sensor is an Alpha MF01A-N-221-A01&nbsp;with 1/2 diameter sensing region.

We used to stock the Interlink model 402 FSR - the Alpha version is almost half the price...

In Stock
[Buy Now](https://www.adafruit.com/product/166)
[Related Guides to the Product](https://learn.adafruit.com/products/166/guides)
### Square Force-Sensitive Resistor (FSR)

[Square Force-Sensitive Resistor (FSR)](https://www.adafruit.com/product/1075)
FSRs are sensors that allow you to detect physical pressure, squeezing and weight. They are simple to use and low cost. This sensor is an Alpha MF02A-N-221-A01 FSR with a 38mm square sensing region. Note that this sensor can't detect _where_ on the square you pressed (for that, <a...></a...>

In Stock
[Buy Now](https://www.adafruit.com/product/1075)
[Related Guides to the Product](https://learn.adafruit.com/products/1075/guides)
### Extra-long force-sensitive resistor (FSR)

[Extra-long force-sensitive resistor (FSR)](https://www.adafruit.com/product/1071)
FSRs are sensors that allow you to detect physical pressure, squeezing and weight. They are simple to use and low cost. This sensor is a Interlink model 408 FSR with a massive 1/4-inch x 24-inch sensing region. You can press anywhere along the strip and the pressure will be recognized. Note...

No Longer Stocked
[Buy Now](https://www.adafruit.com/product/1071)
[Related Guides to the Product](https://learn.adafruit.com/products/1071/guides)
### Terminal Block - 2-pin 3.5mm - pack of 5!

[Terminal Block - 2-pin 3.5mm - pack of 5!](https://www.adafruit.com/product/724)
Nothing makes a project harder to maintain than a lot of loose wiring. That's why we like to use terminal blocks whenever making PCB-to-Wire connections. These particular 3.5mm terminal blocks are our favorite: big enough for a range of wire gauges, easy to adjust with a screwdriver, and...

In Stock
[Buy Now](https://www.adafruit.com/product/724)
[Related Guides to the Product](https://learn.adafruit.com/products/724/guides)

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