m5stackM5Stack· Motors & actuators
BaseX EV3 motor compatible base RJ11 interface
Manufacturer part no. K037
$19.95≈ 17.29 €
Price summary
Sold by 2 suppliers, from €17.16 to €17.29. The lowest listed price is Mouser at €17.16. Once shipping, VAT and customs duty are added, the cheapest delivered is m5stack at about €38.75 — Mouser lands at about €44.59. Prices last checked on 2026-09-16.
Delivered cost is an estimate for a single item shipped to mainland France; the seller's checkout is authoritative.
In stock
Estimated landed cost
| Item | €17.29 |
|---|---|
| Shipping | €15.00 |
| VAT (20%) | €6.46 |
| Total delivered | €38.75 |
Estimate for a single item delivered to mainland France, shipped from outside the EU: customs duty and clearance fees may apply and are charged by the carrier.
2 offers for this product
| Seller | Availability | Price | Seller link |
|---|---|---|---|
| m5stackBest delivered cost | In stock | $19.95€20.75 incl. VAT | Visit ↗ |
| Mouser | Backorder | €17.16€20.59 incl. VAT | Visit ↗ |
Prices compared incl. VAT: some sellers list ex-VAT trade prices, others VAT-inclusive retail prices. The badge marks the best estimated delivered cost, shipping and duties included — not always the first row.
Specifications (automatically extracted)
Mechanical
| Weight | 135 g |
Description
Description Base X is a specialized base compatible with LEGO EV3 motors. Its structural design is similar to BASE26, supporting multiple mounting methods, and additionally providing a LEGO connector base that allows Base X to be easily integrated into LEGO builds. Base X can connect up to 4 LEGO motors (RJ11) simultaneously, supporting angle/speed reading and control, perfectly compatible with the original motor functions. In addition, the base provides 2 servo interfaces for direct servo angle control, a built-in PDM microphone for sound acquisition, a UART interface (16/17), and a GPIO interface (26/36), making it more flexible for connecting various sensors in different scenarios. The base has a built-in 950mAh battery that can be charged via the M5Core’s USB Type-C port to extend battery life. To improve the driving capability of the interfaces, the base is equipped with a DC power jack for powering motors using an external 9 ~ 12V DC power supply (charging through the base is not supported). Features 4-way RJ12 LEGO motor interface (total maximum current output 2A for the base) 2-way servo drive (total maximum current output 2A for the base) 1-way UART 1-way GPIO Built-in PDM microphone (G34) Onboard DC-DC conversion (9 ~ 12V input, for independent motor power only) Built-in 950mAh battery Multiple mounting methods / LEGO hole support Applications LEGO encoder motor/servo controller Intelligent control for LEGO DIY toys Includes 1 x Base X 1 x LEGO Base 2 x M3 * 5mm 304 Stainless Steel Hex Socket Bolt 2 x M3 * 32mm 304 Stainless Steel Hex Socket Bolt 1 x Hex Key L-Shape 2.5mm (For M3 Screw) Specifications Specification Parameter MCU STM32F030C8T6 Communication Interface I2C Communication @0x22 Product Size 54.0 x 54.0 x 26.0mm Product Weight 59.0g Package Size 150.0 x 65.0 x 40.0mm Gross Weight 110.0g Learn and Documents → DOCUMENTS
