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Explore top DIY uses for the MGT disc magnet 3x1mm. Get project ideas, technical specs, and South African supply guidance for makers, students and engineers.
MGT 3x1mm magnets enable compact sensing and fastening in electronics.
Ideal for sensor triggers, closures, teaching aids, and micro robotics.
Source MGT disc magnets and accessories efficiently through Communica.
Disc magnets like the MGT 3x1mm offer an efficient way to add non-contact actuation, secure closures, or compact sensing to your DIY electronics or prototyping projects. With a diameter of 3mm and a thickness of just 1mm, these neodymium magnets are prized for a high magnetic strength-to-size ratio. Their form factor and accessibility through local suppliers, including Communica, make them a popular choice for South African makers, students, and small-scale manufacturers.
| Attribute | Typical Value | Application Note |
|---|---|---|
| Diameter | 3mm | Suits miniature builds; can be press-fitted or glued |
| Height | 1mm | Low profile; does not interfere with most enclosures |
| Material | Neodymium (NdFeB) | Strong field strength, suitable for triggering small sensors |
| Coating | Nickel-plated | Improves corrosion resistance for moderate humidity |
| Pull force (approx.) | ~150g | Sufficient for reed/magnet sensor actuation and light attachment |
Attach the MGT 3x1mm disc magnet to a rotating wheel or shaft, and use a nearby A3144 (or similar) Hall effect sensor to detect each rotation. This enables you to build a low-cost digital tachometer or simple event counter for robotics or monitoring applications.
[3V]---[Reed Switch]---+---[Input Pin MCU]
|
[10kOhm]
|
[GND]
As the MGT disc magnet passes near the reed switch, the circuit closes and the microcontroller (e.g., Arduino, ESP32) can detect the change to trigger events in your program.
| Problem | Likely Cause | Practical Fix |
|---|---|---|
| Sensor not triggering | Magnet too far / misplaced pole | Move sensor closer; use compass to verify magnet orientation |
| Weak attachment | Surface not flat or glue not suitable | Sand contact area or select stronger adhesive |
| Corrosion spots over time | Prolonged moisture exposure | Seal with epoxy or conformal coat if needed |
When building classroom sets, kits for robotics clubs, or one-off innovations, it's practical to order disc magnets, microcontrollers, and sensors together to save on delivery or collect directly from a Communica branch. For VAT-registered institutions, easily request VAT-compliant invoices at checkout.
Free shipping for orders over ZAR 1,000.00.
Get a full refund if you had the product for less than 7 days.
Nationwide delivery within 2 - 4 working days.
Communica supplies semiconductors and electronic components to industries such as automotive, electrical, automation, mining, and education.
Disclaimer: This content is for educational purposes only. Product availability, pricing, and specifications are subject to change. Always verify current details on the retailer's website before making a purchase. We may earn affiliate commissions from qualifying purchases.
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