Termoactuator ~ Localize heat controller

Projects General Guidance
1

Hi to everyone!
I'm completely new to this forum, so please tell me if I'm off category.

I'm asking if anyone knows if exist a device where we control how much it heats.

My raw solution (for now still not tested) is to have an almost shot circuited wire and controlling trough a transistor (bjt) the current.

The temperature I have to reach does not need to be high (40 ~ 50C°).
I'm building thia becouse I have tendons problems, and heat helps the pain and the healing.

Have a nice day to everyone!

2

Consider this:

The linked spec sheets show the maximum temperature achievable with various input voltages. Temperature/power can be controlled via PWM and a transistor or mosfet, so you don't burn yourself.

3

I use a commercial heating pad for that. They are readily available in a wide range of sizes and are much safer than DIY examples.

4

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