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Full machine-readable index: https://core-electronics.com.au/llms.txt # FEETECH Mini Servo FT1117M-FB with Position Feedback **Type:** Product page · **SKU:** POLOLU-3440 · **Brand:** [Pololu](https://core-electronics.com.au/brands/pololu-australia) **Page:** https://core-electronics.com.au/feetech-mini-servo-ft1117m-fb-with-position-feedback.html ([markdown](https://core-electronics.com.au/feetech-mini-servo-ft1117m-fb-with-position-feedback.html.md)) This version of the FT1117M miniature servo from FEETECH is specially modified to provide access to the feedback potentiometer through a fourth (green)... ## Pricing - **Price:** $37.90 (inc GST) — $34.45 AUD, exc GST - **Quantity discounts:** 10+ $33.07 (exc GST) · 25+ $32.05 (exc GST) ## Availability & dispatch - Available with a lead time — expect dispatch between Aug 14 and Aug 17. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=POLOLU-3440:1` (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/POLOLU-3440:1.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 The FT1117M-FB is a specially modified version of FEETECH’s [FT1117M miniature-sized servo](https://core-electronics.com.au/feetech-mini-servo-ft1117m.html) that provides access to the feedback potentiometer through a fourth (green) wire, which makes it possible to directly measure the output angle. With this extra information, you can determine when the servo has reached its target position (or detect if something is interfering with its ability to get there). This feedback also enables more complex closed-loop control of the servo from your main controller. The FT1117M-FB is a miniature-sized servo from FEETECH with the same output spline as standard servos, making it compatible with standard-size servo horns. The pinion gear is plastic, but the rest of the gear train consists of all metal gears, allowing this servo to deliver the kind of speed and torque typically associated with larger servos. | [![](https://core-electronics.com.au/attachments/localcontent/0J7757_39354306825.jpg)](https://core-electronics.com.au/attachments/localcontent/0J7757_17301fd9134.jpg) | |---| Like the FT1117M, the FT1117M-FB works with standard RC servo pulses, providing an operating angle of approximately 120° over a servo pulse range of 900 µs to 2100 µs. The feedback voltage varies linearly over this range by a couple of volts. As with most servos, the pulse range can be expanded to achieve an expanded operating angle, but the limits of this are not specified by FEETECH. (In Pololu's tests, Pololu were able to get an expanded range of approximately 165° over a pulse range of 550 µs to 2400 µs, but as this is not part of FEETECH’s official specifications, it is possible different units will behave differently in this regard.) The servo signal, power, and ground are provided through a 3-wire servo cable that is terminated with a standard [JR-style connector](https://core-electronics.com.au/jr-connector-pack-female.html), which is Futaba-compatible. The feedback is accessible through a separate green wire that is terminated like Pololu's female [premium jumper wires](https://core-electronics.com.au/prototyping/prototyping-wire.html) and works with standard [0.1" male header pins](https://core-electronics.com.au/connectors-sockets/headers.html). These cables are approximately 7" (18 cm) long. | [![](https://core-electronics.com.au/attachments/localcontent/0J9680_23920878aa8.jpg)](https://core-electronics.com.au/attachments/localcontent/0J9680_11055dd3100.jpg) | |---| | Servo and feedback connectors on the FEETECH servos with position feedback. | For more information about this servo, see the FT1117M datasheet (125k pdf) (please note that this is the datasheet for the standard FT1117M, so it does not include any information about the special feedback modification). | [![](https://core-electronics.com.au/attachments/localcontent/0J7756_1149725868d.jpg)](https://core-electronics.com.au/attachments/localcontent/0J7756_62338780a81.jpg) | |---| | FEETECH Mini Servo FT1117M with included hardware (actual hardware might vary). | Note that, as with most hobby servos, stalling or back-driving this servo can damage it. **Comparison to the Power HD 1711MG servo** The FT1117M is a lower-cost alternative to the [1711MG](https://core-electronics.com.au/power-hd-mini-servo-hd-1711mg.html) from Power HD, which has nearly identical dimensions and similar performance. The two servos should be generally interchangeable for most applications. The picture below shows both the FT1117M and the 1711MG side by side: | [![](https://core-electronics.com.au/attachments/localcontent/0J7758_27282e74731.jpg)](https://core-electronics.com.au/attachments/localcontent/0J7758_12424509e15.jpg) | |---| **People often buy this product together with:** | [![FEETECH FS90-FB Micro Servo with Position Feedback](https://core-electronics.com.au/attachments/localcontent/0J9681_58940d04c0.jpg)](https://core-electronics.com.au/feetech-fs90-fb-micro-servo-with-position-feedback.html) | [FEETECH FS90-FB Micro Servo with Position Feedback](https://core-electronics.com.au/feetech-fs90-fb-micro-servo-with-position-feedback.html) | |---|---| | [![FEETECH Sub-Micro Servo FS0403-FB with Position Feedback](https://core-electronics.com.au/attachments/localcontent/0J9682_5792a5a50b.jpg)](https://core-electronics.com.au/feetech-sub-micro-servo-fs0403-fb-with-position-feedback.html) | [FEETECH Sub-Micro Servo FS0403-FB with Position Feedback](https://core-electronics.com.au/feetech-sub-micro-servo-fs0403-fb-with-position-feedback.html) | |---|---| | [![FEETECH Standard Servo FS5103B-FB with Position Feedback](https://core-electronics.com.au/attachments/localcontent/0J9679_5426ff389a.jpg)](https://core-electronics.com.au/feetech-standard-servo-fs5103b-fb-with-position-feedback.html) | [FEETECH Standard Servo FS5103B-FB with Position Feedback](https://core-electronics.com.au/feetech-standard-servo-fs5103b-fb-with-position-feedback.html) | |---|---| **Dimensions** | Size: | 30 × 12 × 31.7 mm | |---|---| | Weight: | 22 g | **General specifications** | Digital?: | N | |---|---| | Speed @ 6V: | 0.11 sec/60° | | Stall torque @ 6V: | 3.5 kg·cm | | Speed @ 4.8V: | 0.13 sec/60° | | Stall torque @ 4.8V: | 3 kg·cm | | Hardware included?: | Y | | Lead length: | 7 in | **File downloads** - **Datasheet for the FEETECH Mini Servo FT1117M (125k pdf)** ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/i/m/image_11682.jpg)