> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt # 25kg.cm Wide Range Voltage Serial Bus Servo **Type:** Product page · **SKU:** WS-24703 · **Brand:** [Waveshare](https://core-electronics.com.au/brands/waveshare-in-australia) **Page:** https://core-electronics.com.au/25kgcm-wide-range-voltage-serial-bus-servo.html ([markdown](https://core-electronics.com.au/25kgcm-wide-range-voltage-serial-bus-servo.html.md)) 25kg.cm Wide Range Voltage Serial Bus Servo, High Precision And Large Torque, With Programmable 360 Degrees Magnetic Encoder, Two-Way Feedback,... ## Pricing - **Price:** $40.45 (inc GST) — $36.77 AUD, exc GST - **Quantity discounts:** 10+ $35.30 (exc GST) · 25+ $34.20 (exc GST) ## Availability & dispatch - Available with a lead time — expect dispatch between Aug 31 and Sep 07. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=WS-24703:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart. - **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/WS-24703:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.) - **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there. - **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works) - **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt ## Description ## Details 25kg.cm Wide Range Voltage Serial Bus Servo, High Precision And Large Torque, With Programmable 360 Degrees Magnetic Encoder, Two-Way Feedback, Servo/Motor Mode Switchable 25kg.cm Wide Range Voltage serial bus servo Supports 6~14V Wide Range Voltage input, with 360° Magnetic Encoder ![](https://core-electronics.com.au/attachments/localcontent/ST3020-Servo-details-1_99077becb05.jpg) Specifications | Product type | ST3020 serial bus servo | |---|---| | Torque | 25kg.cm@12V | | Rotation angle | 360° (0~4095) | | Position sensor resolution | 0.088° (360°/4096) | | Mechanism limit angle | No Limit | | Working voltage | 6 ~ 14 V (typ. 12V) | | Gear | high precision metal gear | | No-load speed | 0.167sec/60° (60RPM)@12V | | Encoder type | 12Bits magnetic encoder | | ID range | 1 ~ 253 | | Baudrate | 38400bps ~ 1Mbps (1Mbps by default) | | Feedback | Position, Load, Speed, Input Voltage, Current, Temperature | | No-load current | 200mA@12V | | Locked-rotor current | 2.7A@12V | | Kt | 9.26kg.cm/A | Application Examples - Servos will provide various feedback like load, position, speed, torque lock, and working mode (servo mode, servo motor mode, etc.) for advanced projects requiring closed-loop automatic control. - Ideal choice for building quadruped robots, hexapod walkers, robotic arms and other robotic projects requiring multiple servos. (This product provides the open source models as shown in the picture below) ![](https://core-electronics.com.au/attachments/localcontent/ST3020-Servo-details-3-1_35286731e27.jpg) **Download models:** [![](https://core-electronics.com.au/attachments/localcontent/ST3020-Servo-details-STEP_1082bec881.png)](https://core-electronics.com.au/attachments/localcontent/CLAWER-6_based_on_ST3020_Servo_STEP_106035bb312.zip) [![](https://core-electronics.com.au/attachments/localcontent/ST3020-Servo-details-F3Z_1031105fee.png)](https://core-electronics.com.au/attachments/localcontent/CLAWER-6_based_on_ST3020_Servo_F3Z_30304ae8135.zip) ![](https://core-electronics.com.au/attachments/localcontent/ST3020-Servo-details-3-2_2961452f5b1.jpg) **Download models:** [![](https://core-electronics.com.au/attachments/localcontent/ST3020-Servo-details-STEP_1082bec881.png)](https://core-electronics.com.au/attachments/localcontent/CLAWER-4_based_on_ST3020_Servo_STEP_10353abcbb9.zip) [![](https://core-electronics.com.au/attachments/localcontent/ST3020-Servo-details-F3Z_1031105fee.png)](https://core-electronics.com.au/attachments/localcontent/CLAWER-4_based_on_ST3020_Servo_F3Z_290981d1c38.zip) ![](https://core-electronics.com.au/attachments/localcontent/ST3020-Servo-details-3-3_18363a17789.jpg) **Download models:** [![](https://core-electronics.com.au/attachments/localcontent/ST3020-Servo-details-STEP_1082bec881.png)](https://core-electronics.com.au/attachments/localcontent/ARM_based_on_ST3020_STEP_2087978aad1.zip) [![](https://core-electronics.com.au/attachments/localcontent/ST3020-Servo-details-F3Z_1031105fee.png)](https://core-electronics.com.au/attachments/localcontent/ARM_based_on_ST3020_F3Z_773187a8921.zip) ![](https://core-electronics.com.au/attachments/localcontent/ST3020-Servo-details-3-4_2007993fe86.jpg) **Download models:** [![](https://core-electronics.com.au/attachments/localcontent/ST3020-Servo-details-STEP_1082bec881.png)](https://core-electronics.com.au/attachments/localcontent/PT_based_on_ST3020_STEP_17246234212.zip) [![](https://core-electronics.com.au/attachments/localcontent/ST3020-Servo-details-F3Z_1031105fee.png)](https://core-electronics.com.au/attachments/localcontent/PT_based_on_ST3020_F3Z_55049b51432.zip) \* images here are for reference ONLY UART Serial Bus Control Allows controlling up to 253 serial bus servos at the same time ![](https://core-electronics.com.au/attachments/localcontent/ST3020-Servo-details-5_11220d01528.jpg) Note: though one channel UART can control up to 253 serial bus servos, due to the high power of the servos, it is necessary to consider whether the power supply solution is enough when using too many servos. For reference only, the [servo driver board](https://core-electronics.com.au/servo-driver-with-esp32.htm) is NOT included Easy to use, Large Torque ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/W/S/WS-24703-1.jpg)