Constructed from a multi-layered PCB, CoilCell is a thin planar coil with an integrated driver, making it compact while simplifying control of magnetic polarity and strength.

The on-board driver features the DRV8837 h-bridge chip which can control the direction and strength of the current flowing through the coil, allowing the CoilCell to be driven:

• Magnetic North (IN1 = VCC/PWM, IN2 = GND)
• Magnetic South (IN1 = GND, IN2 = VCC/PWM)
• OFF (IN1 = GND, IN2 = GND)

The box will include the CoilCell, a set of four M1.2 screws, 4-pin male-header, and any optional magnetic parts. The PCB is ROHS Compliant & follows IPC-A-600 II standard. Please note that the CoilCell is intended to be used as a DIY maker kit. For commercial purposes, please get in touch.

Looking to add multiple CoilCells to your project? Simplify your setup by soldering neighboring cells together! The side pads make it easy to share power and input signals across multiple cells. Customize each CoilCell with its own unique input using separate wires, or synchronize them by wiring the same input signal across multiple cells.

Some other Notes:

• Take caution when using the 2.5W 200-Turns CoilCell. Depending on the application, it might heat up to 110°C (especially the electromagnet iron back-plate), so keep hands away from hot areas to prevent injury & turn the coil off when not in use.
• We also recommend using eye protection when using small magnets with the 2.5W 200-Turns CoilCell, as it may repel the magnets upward.
• The DRV8837 chip has Overcurrent Protection, Undervoltage Lockout & Thermal Shutdown. However, caution must be taken not to reverse its supply rails.
• The force produced by a CoilCell depends on the mechanical elements of your project, as well as the weight and strength of the magnet.
• Any soldered wires/jumper cables must be non-magnetic to prevent magnets from attaching to them.
• When using the 2.5W 200-Turn CoilCell, be aware that it can heat up to 110°C at maximum power. Ensure that 3D prints, magnets, and other materials used can withstand the operating temperature. To manage the heat, you can adjust the duty cycle to reduce power output. Additionally, you can protect the magnets by elevating them or covering the CoilCell to minimize direct contact with surfaces and reduce heat transfer.
• The CoilCell Library is available for download on both GitHub and the Arduino Library Manager. Basic functions work on all Arduino boards, with optimized PWM functions for CodeCell & other ESP32 devices.
• Schematics for this module are available here.

Creative projects you can make with CoilCell:

Magnets

Keep it fixed and add lightweight magnets on top to make them bounce. You can also hide magnets inside lightweight objects ~ Find its resonance to Shake Things Up!



Electromagnet

Upgrade your 2.5W CoilCell with the iron plate, boosting its peak strength from 10mT to 17mT! This upgrade turns your CoilCell into a weak electromagnet, attracting paper clips, and other lightweight metal!



FlipDot Pixel

Pivot a magnet and watch it flip! Build your own 3D-printed magnetic FlipDot pixel, and add more for a mini displpay. Both your ears and eyes will love it! Make it even more interactive with the CodeCell Sensors



Magic Dice

Ready for a cool magic trick? Here's the secret: our dice has a hidden magnet, letting you hack the slim 2.5W CoilCell into an automatic shaker or cheat your way to a perfect 6 on every roll!