# Arduino Uno 3-Servo Tentacle Controller ## Description Beginner-friendly breadboard schematic for an Arduino Uno driving exactly three servo headers from a separate 4xAA battery pack with shared ground and clear wiring labels. ## Project Details - **Owner:** sangregoriokimpo - **Created:** 4/11/2026 - **Last Updated:** 4/11/2026 - **Visibility:** Public ## Key Components ### B2 — [BH34AAW](https://www.flux.ai/jecstronic/bh34aaw.md) - Manufacturer Part Number: BH34AAW - Manufacturer Name: MPD (Memory Protection Devices) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector - Role: Servo Battery Holder - Role Details: 4 x 1.5V AA battery holder for servo power. Positive feeds SERVO_6V rail and negative ties to shared GND with the Arduino. - Package: Wire Leads - Datasheet URL: https://www.memoryprotectiondevices.com/datasheets/BH34AAW-datasheet.pdf **Pins:** - NEGATIVE [pin -] - POSITIVE [pin +] ### Servo1 — [Pin Header 01x03 2.54mm Vertical for Servo Motor](https://www.flux.ai/project-x/pin-header-01x03-2p54mm-vertical-for-servo-motor.md) - Package: THT 1x03 2.54mm - Role: Servo Connector - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Servo Model: MG996R continuous rotation - Header Label: GND / 6V / SIG - Role Details: Servo 1 header: GND / SERVO_6V / SIG from Arduino Uno D9. **Pins:** - 5v [pin 2] - Data [pin 3] - Gnd [pin 1] ### Servo2 — [Pin Header 01x03 2.54mm Vertical for Servo Motor](https://www.flux.ai/project-x/pin-header-01x03-2p54mm-vertical-for-servo-motor.md) - Role Details: Servo 2 header: GND / SERVO_6V / SIG from Arduino Uno D10. - Package: THT 1x03 2.54mm - Role: Servo Connector - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector **Pins:** - 5v [pin 2] - Data [pin 3] - Gnd [pin 1] ### Servo3 — [Pin Header 01x03 2.54mm Vertical for Servo Motor](https://www.flux.ai/project-x/pin-header-01x03-2p54mm-vertical-for-servo-motor.md) - Role: Servo Connector - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector - Role Details: Servo 3 header: GND / SERVO_6V / SIG from Arduino Uno D11. - Package: THT 1x03 2.54mm **Pins:** - 5v [pin 2] - Data [pin 3] - Gnd [pin 1] ### U1 — [Arduino-UNO-R3](https://www.flux.ai/jecstronic/arduino-uno-r3.md) - Role Details: Arduino Uno drives exactly three servo signal lines on D9, D10, and D11. Servos are powered from a separate 4 x 1.5V AA battery holder with shared ground for a beginner-friendly breadboard build. - Manufacturer Part Number: Arduino-UNO-R3 - License: https://creativecommons.org/licenses/by/4.0/ - Package: Through Hole Dev Board - Part Type: Development Board - Manufacturer Name: Arduino - Role: Main Controller - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Arduino%20PDFs/A000066_Web.pdf **Pins:** - +3V3 [pin 4] - +5V [pin 5] - AREF [pin 30] - D0/RX [pin 15] - D1/TX [pin 16] - D10 [pin 25] - D11 [pin 26] - D12 [pin 27] - D13 [pin 28] - D14/A0 [pin 9] - D15/A1 [pin 10] - D16/A2 [pin 11] - D17/A3 [pin 12] - D18/A4 [pin 13] - D18/SDA [pin 31] - D19/A5 [pin 14] - D19/SCL [pin 32] - D2 [pin 17] - D3 [pin 18] - D4 [pin 19] - D5 [pin 20] - D6 [pin 21] - D7 [pin 22] - D8 [pin 23] - D9 [pin 24] - GND [pin 6] - GND [pin 29] - GND [pin 7] - IOREF [pin 2] - NC [pin 1] - RESET [pin 3] - VIN [pin 8] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/sangregoriokimpo/arduino-uno-3-servo-tentacle-controller](https://www.flux.ai/sangregoriokimpo/arduino-uno-3-servo-tentacle-controller).* --- *Generated from [https://www.flux.ai/sangregoriokimpo/arduino-uno-3-servo-tentacle-controller](https://www.flux.ai/sangregoriokimpo/arduino-uno-3-servo-tentacle-controller)*