Blueprint Power Bit vs Motor Bit: Which to Buy First?
By Sphero Coding Robots & Kits | PK-12 STEM Education, AI | Published: 2026-10-14
Category: 비교
The Power Bit supplies energy; the Motor Bit creates motion. Here's how to choose between them for your littleBits Blueprint Engineering builds.
Quick answer
Buy the Blueprint Engineering Power Bit first if your build has no power source, because nothing runs without it. Buy the Blueprint Engineering Motor Bit if you already have power and need rotation for gears or moving parts. They do different jobs, so the right pick depends on what your circuit is missing.
What each Bit actually does
The Blueprint Engineering Power Bit provides the power needed to run motors, sensors, and other electrical Bits in your builds. It is included in the Blueprint Engineering Kit and sold separately for expansion or replacement. The Blueprint Engineering Motor Bit provides rotational power to bring movement to your builds, with two modes so it can act as a Motor or a Servo and connect to other Bits and parts. One feeds the circuit; the other turns that energy into motion.
Cost and replacement planning
At catalog prices, the Power Bit is listed at USD 45.00 and the Motor Bit at USD 20.40. If you are replacing a single failed Bit, match the replacement to the slot that stopped working rather than buying both. If you are expanding a classroom set, remember that every additional motor or moving build still needs a power source to run it, so power Bits often need to scale alongside motion Bits.
How to decide for a specific project
Start by listing the Bits your project already has. If a motor, sensor, or other electrical Bit is present but nothing lights up or moves, the missing piece is likely power. If the circuit powers on but nothing rotates, the missing piece is likely the Motor Bit. For builds that combine several moving elements, plan one power source per circuit and add Motor Bits where you need independent rotation.
Trade-offs to weigh before you buy
- Power Bit: enables everything, moves nothing: It supplies energy to electrical Bits, but on its own it will not create rotation or motion in a build. Buy it when your circuit has no working power source.
- Motor Bit: creates motion, needs power: It rotates gears and moving elements in Motor or Servo mode, but it still depends on a power Bit or another power source in the circuit. Buy it when power is already handled and you need movement.
- Budget order matters: The Motor Bit lists lower than the Power Bit, but buying motion first is wasted if the build cannot power on. Fix the power gap before adding motion.
Product facts
- Blueprint Engineering Power Bit: Supplies energy to electrical Bits for builds and is built for repeated classroom use on various projects. Without it, motors, sensors, and other electrical Bits have no power, so it is the first Bit to check when a build is completely dead.
- Blueprint Engineering Motor Bit: Provides rotational power with two modes, acting as a Motor or a Servo, and connects to other Bits and parts. Choose it when you need gears or moving elements to turn, and use the Servo mode when a build needs controlled positioning rather than continuous spin.
- littleBits p3 usb power: Connects to a computer or phone charger with the included USB cable to send power to creations. A low-cost way to power a simple circuit when you do not need the Blueprint Power Bit's classroom durability.
Which Bit fits your situation
Best for
- Classrooms replacing a dead power source in an existing Blueprint Engineering Kit
- Builders whose motors, sensors, or other electrical Bits will not run
Not for
- Builders who already have working power and need rotation for gears or moving parts
- Projects that only need a simple, low-cost power connection for a basic circuit
