{"product_id":"so-101-builders-pack-hardware-no-servos","title":"SO-101 Builder's Pack (No Servos): Servo Adapter Board, 12 Metal Horn Sets, Cables, Power Adapter, G-Clamps + Free 3D-Print Files, for SO-ARM100 \/ SO-ARM101 LeRobot Arms","description":"\u003cp\u003e\u003cstrong\u003eThe SO-101 Builder's Pack is a hardware bundle for people building a LeRobot SO-ARM100 \/ SO-ARM101 arm from their own STS3215 servos and 3D-printed parts: the USB servo adapter, metal horns, servo cables, power adapter and desk clamps that boxed kits include but nobody sells separately, together with a free download of ArmDojo's SO-101 print files.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eEverything around the servos that an SO-101 build needs and that nobody sells as one bag: the USB servo adapter, twelve metal horns, the right cables in the right lengths, a power adapter and the clamps, plus a free download of our 3D-print files. Pair it with a 12-servo STS3215 set and a roll of PLA and you have a complete leader–follower rig for a fraction of a boxed kit.\u003c\/p\u003e\u003ch2\u003eWhat can you use it for?\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCompleting a Seeed or Feetech 12-servo set into a working leader–follower pair\u003c\/li\u003e\n\u003cli\u003eBuilding a second follower arm for bimanual setups\u003c\/li\u003e\n\u003cli\u003eClassroom builds where students print the parts themselves\u003c\/li\u003e\n\u003cli\u003eReplacing the miscellaneous hardware after moving a kit between labs\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho is it for?\u003c\/h2\u003e\u003cp\u003eMakers and labs who already have (or are buying) STS3215 servos and a 3D printer, and want the rest of the bill of materials in one order.\u003c\/p\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eArms: SO-ARM100, SO-ARM101 (LeRobot SO-101), leader and follower\u003c\/li\u003e\n\u003cli\u003eServos: 6 × Feetech STS3215 per arm (12 V for follower, 7.4 V mix for leader), sold separately as the SO-ARM101 12-servo set\u003c\/li\u003e\n\u003cli\u003eSoftware: Hugging Face LeRobot so101 configs; the Waveshare adapter appears as a serial port\u003c\/li\u003e\n\u003cli\u003ePrinting: PLA or PETG, about 1 kg per pair; files download after purchase\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eGetting started: from unboxing to your first LeRobot dataset\u003c\/h2\u003e\u003col\u003e\n\u003cli\u003ePrint the parts from the download link in your order email (leader and follower STLs, camera brackets).\u003c\/li\u003e\n\u003cli\u003eSet the servo IDs 1–6 with the Waveshare adapter and the Feetech tool before assembly.\u003c\/li\u003e\n\u003cli\u003eFit the metal main + rear horns to each servo and assemble the joints following the SO-101 guide.\u003c\/li\u003e\n\u003cli\u003eWire the chain with the 15 \/ 20 \/ 40 cm cables, base servo to the adapter.\u003c\/li\u003e\n\u003cli\u003eClamp the base to the desk with two G-clamps, connect power and USB, and run LeRobot calibration.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eFor\u003c\/th\u003e\n\u003ctd\u003eSO-ARM100 \/ SO-ARM101 (LeRobot SO-101) arms built from your own or our free 3D-printed parts and 6 Feetech STS3215 servos per arm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePer arm\u003c\/th\u003e\n\u003ctd\u003e1 × Waveshare Bus Servo Adapter (A), 6 × STS3215 metal main + rear horn sets with screws, 12 × 3-pin servo cables (4 × 15, 4 × 20, 4 × 40 cm), 1 × 7.4 V 3 A power adapter (leader) or 12 V supply note (follower), 2 × 2-inch G-clamps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e3D files\u003c\/th\u003e\n\u003ctd\u003eFree download of ArmDojo's SO-101 print files (STL, leader and follower) with every order; link is in the order confirmation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNot included\u003c\/th\u003e\n\u003ctd\u003eSTS3215 servos (sold separately: SO-ARM101 12-servo set), printed parts, cameras\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePair pack\u003c\/th\u003e\n\u003ctd\u003eTwo of everything above: two adapters, 12 horn sets, 24 cables, two power adapters, four clamps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOne arm (follower or leader):\u003c\/strong\u003e 1 × Waveshare Bus Servo Adapter (A), 6 × STS3215 metal main + rear horn sets with screws, 12 × 3-pin cables (4 × 15, 4 × 20, 4 × 40 cm), 1 × 7.4 V 3 A power adapter, 2 × 2-inch G-clamps, download card for the 3D-print files\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLeader + follower pair:\u003c\/strong\u003e 2 × Waveshare adapters, 12 × horn sets, 24 × cables, 2 × power adapters (7.4 V for the leader, 8.4 V\/12 V note for the follower), 4 × G-clamps, download card\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003ch3\u003eWhat is not included?\u003c\/h3\u003e\u003cp\u003eThe servos and the printed plastic parts. Add the SO-ARM101 12-servo set from this store, print the parts from our free files, and you have a complete pair. Cameras are optional and sold separately.\u003c\/p\u003e\u003ch3\u003eWhich power adapter comes in the pack?\u003c\/h3\u003e\u003cp\u003eA 7.4 V 3 A adapter for the leader arm. A follower built from 12 V STS3215-C018 servos needs a 12 V 5 A supply; if you tell us at checkout we swap the adapter.\u003c\/p\u003e\u003ch3\u003eAre the 3D files really free?\u003c\/h3\u003e\u003cp\u003eYes. Every Builder's Pack order includes a download link to ArmDojo's SO-101 print files, licensed for personal and educational use.\u003c\/p\u003e\u003ch3\u003eIs this cheaper than a boxed DIY kit?\u003c\/h3\u003e\u003cp\u003eServo set plus Builder's Pack comes to roughly the price of the Hiwonder DIY kit while letting you print the parts in any colour and swap in STS3250 shoulders.\u003c\/p\u003e","brand":"ArmDojo","offers":[{"title":"One arm (follower or leader)","offer_id":50760956739823,"sku":"SO101-BUILD-1","price":90.0,"currency_code":"SGD","in_stock":true},{"title":"Leader + follower pair","offer_id":50760956772591,"sku":"SO101-BUILD-2","price":166.0,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0821\/5406\/2063\/files\/01_collage.jpg?v=1789437248","url":"https:\/\/armdojo.com\/products\/so-101-builders-pack-hardware-no-servos","provider":"ArmDojo","version":"1.0","type":"link"}