# Configuring themristor from old printer **URL:** \ **Category:** General Discussion\ **Created:** [November 24, 2024, 7:50pm UTC](https://klipper.discourse.group/t/configuring-themristor-from-old-printer/20236 "2024-11-24T19:50:09Z")\ **Posts on this page:** 3\ **Page:** 2
**Author:** ![mykepredko](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/mykepredko/32/2085_2.png) [@mykepredko](https://klipper.discourse.group/u/mykepredko)\ **Post date:** [November 26, 2024, 2:44pm UTC](https://klipper.discourse.group/t/configuring-themristor-from-old-printer/20236/21 "2024-11-26T14:44:14Z")
> [@Sineos](#): > > This may seem a bit blunt advice, as you cannot just connect a thermistor to a free MCU pin without the hardware to support it, e.g. the necessary voltage divider etc. To be more precise, you need a free ADC pin and a 1% pull up resistor (4.7k 1% is the default for Klipper) to 3.3V. Not impossible that an ADC pin is available but you need to be able to read a schematic and a datasheet as well as be familiar with soldering on an SMT board for you to be successful. It would probably be easier to buy a new main controller board. ---
**Author:** ![hcet14](https://avatars.discourse-cdn.com/v4/letter/h/ecd19e/32.png) [@hcet14](https://klipper.discourse.group/u/hcet14)\ **Post date:** [November 26, 2024, 8:23pm UTC](https://klipper.discourse.group/t/configuring-themristor-from-old-printer/20236/22 "2024-11-26T20:23:54Z")
@Sineos @mykepredko You’re way too fast. @pierre286 never told us, which way he wants to go. New printer board or the original one. If he goes with the original printer board “and” wants to use a thermistor “and” has an ADC pin available, then we could talk about how to connect the thermistor to the original STM32F103RCT6. Two "and"s! ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/klipper/original/1X/64419bf2aac6639e6ef5cef200dcd456b0a01ac3.png) [@system](https://klipper.discourse.group/u/system)\ **Post date:** [January 25, 2025, 8:24pm UTC](https://klipper.discourse.group/t/configuring-themristor-from-old-printer/20236/23 "2025-01-25T20:24:51Z")
Closed on January 25, 2025, 8:24pm UTC This topic was automatically closed 60 days after the last reply. New replies are no longer allowed. [Previous page](https://klipper.discourse.group/t/configuring-themristor-from-old-printer/20236.md?page=1)