Battery Magnet Stirrer

thingiverse

Here's the rewritten text in a clear and concise manner: **Magnetic Stirrer on a 9 Volt Battery** I'm excited to share my latest project with you - a magnetic stirrer that runs on a 9 volt battery. The idea came about when I realized how tedious it is to test water values from an aquarium, only to have to unplug and clean up afterwards. **Problem Statement** Most magnetic stirrers require electricity from the socket, which can be inconvenient. I wanted to create a solution that would allow me to test water without having to worry about plugging and unplugging the device every time. **Design and Testing** After 40 hours of designing and 5 test prints, I'm happy to share my result with you. The magnetic stirrer is small, easy to use, and runs on a single 9 volt battery. The LED can be switched on as needed (V1) or lights up permanently (V2). **Materials Needed** Here's what you'll need to build your own magnetic stirrer: * PWM controller - €6.99 * Magnets for stirring - €15.87 (tip: use the 15 mm size for water testing) * Battery clips - €6.99 * PWM! Fan 40x40x10 mm - €14.99 **Assembly Instructions** 1. Connect the battery to the upper connector, making sure the + pole is facing upwards. 2. Connect another cable from the controller to the fan. 3. Screw together the LED and motor poles. 4. Use a cable for extension to connect the fan to the controller (soldered in place). 5. Insert and solder the fan into the device. 6. Glue the magnet holder onto the fan, making sure a positive pole points upwards. 7. Cover the device and enjoy! **Tips and Variations** * For better air circulation, leave the rotor blades on the fan. * To make the fan turn even faster, remove the rotor blades. **Environmentally Friendly Version** I'm currently removing the same version with a rechargeable battery to reduce waste and minimize the need for battery replacements. If you have any questions or concerns, feel free to comment below!