Kids OK with adultArduino NanoLevel 2/3
Robot Arm Pick & Place
A 3-servo arm picks each block off one belt and places it on the other, again and again.

Kids OK, with an adult
DIY project. Children must build this only with an adult (16+ years) beside them at all times. Not suitable for children under 8 years.
Do not power the servos from the Nano 5V pin.
Strictly follow the description given with this video.
Video
The video link will be added here soon.
How it works
- The shoulder and elbow servos move together, joint by joint, so the arm never dips into a V.
- The gripper servo opens and closes on the block.
- The arm lifts, swings over, lowers and releases.
- The servos run from their own 5V 3A supply with a common ground.
Parts you need
- Arduino Nano× 1Buy
- 2× metal-gear micro servos (shoulder, elbow)× 2Buy
- 1× micro servo (gripper)× 1Buy
- 5V 3A power supply× 1Buy
- Breadboard + jumper wires× 1Buy
Kit for this projectPrice on request
Get the kitWiring

PowerGroundSignal
| # | From | Connect to |
|---|---|---|
| 1 Signal | Shoulder signal | Nano D9 |
| 2 Signal | Elbow signal | Nano D10 |
| 3 Signal | Gripper signal | Nano D11 |
| 4 Power | All servo red (+) | 5V 3A supply + |
| 5 Ground | All servo brown (−) | Supply − |
| 6 Ground | Supply − | Nano GND (common ground) |
3D print files
- Arm links + gripperPLA+ / PETG · 0.2 mmLink at launch
Code
The tested Arduino / ESP32 code for this project will be posted here, ready to copy.