Hall effect vs potentiometer sticks
Why some analog sticks drift and others hardly ever do comes down to how they measure the stick position.
| Potentiometer | Hall effect | TMR | |
|---|---|---|---|
| How it measures | Wiper sliding over a resistive track | Magnet and Hall sensor | Magnet and magnetoresistive sensor |
| Physical contact | Yes | No | No |
| Wear over time | Yes – main cause of drift | Very little | Very little |
| Drift risk | Higher | Much lower | Much lower |
| Typically found in | Most standard first-party controllers | Many third-party controllers, some replacement modules | Newer third-party controllers |
Potentiometer sticks
The classic design: for each direction a small wiper slides over a resistive track, and its position sets the voltage the controller reads. It is cheap and precise when new, but the wiper and track rub against each other with every movement. Wear and dust change the reading at rest – that is stick drift.
Hall effect sticks
A small magnet moves with the stick, and a Hall sensor measures the magnetic field. Nothing touches, so there is no track to wear out. That is why Hall effect sticks are the usual recommendation for anyone tired of drift.
TMR sticks
TMR (tunnel magnetoresistance) sensors also read a magnet without contact. They are a newer alternative to Hall effect sensors and appear in more recent third-party controllers.
What this means for you
If your current controller drifts, measure it and try the steps in how to fix stick drift. If you are buying a new controller and drift is your main worry, check the spec sheet for Hall effect or TMR sticks.
FAQ
Can Hall effect sticks drift?
They are far less prone to it because nothing rubs, but they are not immune: a damaged spring, a shifted magnet or poor calibration can still leave the stick off-centre. Test a new controller once to have a baseline.
Can I put Hall effect sticks in my controller?
Replacement Hall effect modules exist for several popular controllers. On most controllers the stick is soldered to the board, so fitting them needs soldering skills or a repair shop, and it usually ends the warranty.
Which is better, Hall effect or TMR?
Both are contactless and avoid wear-related drift. TMR sensors are often marketed as more precise and more power-efficient than Hall effect; in practice, how a manufacturer calibrates the stick matters as much as the sensor type.