# Chakra Brain ## Description Rugged, serviceable 2\-layer carrier board for a student robotics kit, using a socketed ESP32 DevKit, two socketed TB6612FNG motor\-driver modules, a socketed buck converter, and keyed external connectors\. ## Project Details - **Owner:** ayushkh - **Created:** 9/2/2026 - **Last Updated:** 9/3/2026 - **Visibility:** Public - **Copies:** 1 ## Key Components ### J1 — SSQ\-108\-03\-G\-S\-CB - Manufacturer Name: Samtec - Functional Group: Remote - Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/user\-uploaded/36fceb259bb2860d4adf76533d806bc642d3d3b74180603b80f5f3c4604e3d02\.pdf - Role: Remote Breakout Header - Role Details: 1x8 through\-hole remote breakout, labeled P8 through P1 left\-to\-right on top silk\. - Exclude from Pick & Place: true - Mount: Through Hole - Manufacturer Part Number: SSQ\-108\-03\-G\-S **Pins:** - 01 [pin 01] - 02 [pin 02] - 03 [pin 03] - 04 [pin 04] - 05 [pin 05] - 06 [pin 06] - 07 [pin 07] - 08 [pin 08] ### J2 — CB\-6P6C\-12MM\-STAGGER - Current Rating: 1\.5A - Functional Group: Motor Outputs - Manufacturer Name: Custom from user\-supplied mechanical drawing - Mount: Through Hole - Role Details: 6P6C motor jack; physical contact 3 is the M\+ net\-name convention and contact 4 is M\-; contacts 1, 2, 5, and 6 are intentionally NC\. H\-bridge drive reverses instantaneous voltage polarity\. - Allow Substitutes: No - Role: Motor Output M1 - Manufacturer Part Number: PLACEHOLDER\-CB\-6P6C\-12MM\-STAGGER **Pins:** - CONTACT\_1 [pin 1] - CONTACT\_2 [pin 2] - CONTACT\_3 [pin 3] - CONTACT\_4 [pin 4] - CONTACT\_5 [pin 5] - CONTACT\_6 [pin 6] ### J3 — CB\-6P6C\-12MM\-STAGGER - Functional Group: Motor Outputs - Current Rating: 1\.5A - Manufacturer Name: Custom from user\-supplied mechanical drawing - Mount: Through Hole - Allow Substitutes: No - Role: Motor Output M2 - Role Details: 6P6C motor jack; physical contact 3 is the M\+ net\-name convention and contact 4 is M\-; contacts 1, 2, 5, and 6 are intentionally NC\. H\-bridge drive reverses instantaneous voltage polarity\. - Manufacturer Part Number: PLACEHOLDER\-CB\-6P6C\-12MM\-STAGGER **Pins:** - CONTACT\_1 [pin 1] - CONTACT\_2 [pin 2] - CONTACT\_3 [pin 3] - CONTACT\_4 [pin 4] - CONTACT\_5 [pin 5] - CONTACT\_6 [pin 6] ### J4 — CB\-6P6C\-12MM\-STAGGER - Current Rating: 1\.5A - Manufacturer Name: Custom from user\-supplied mechanical drawing - Mount: Through Hole - Allow Substitutes: No - Role: Motor Output M3 - Role Details: 6P6C motor jack; physical contact 3 is the M\+ net\-name convention and contact 4 is M\-; contacts 1, 2, 5, and 6 are intentionally NC\. H\-bridge drive reverses instantaneous voltage polarity\. - Manufacturer Part Number: PLACEHOLDER\-CB\-6P6C\-12MM\-STAGGER - Functional Group: Motor Outputs **Pins:** - CONTACT\_1 [pin 1] - CONTACT\_2 [pin 2] - CONTACT\_3 [pin 3] - CONTACT\_4 [pin 4] - CONTACT\_5 [pin 5] - CONTACT\_6 [pin 6] ### J5 — CB\-6P6C\-12MM\-STAGGER - Current Rating: 1\.5A - Role: Motor Output M4 - Manufacturer Name: Custom from user\-supplied mechanical drawing - Mount: Through Hole - Allow Substitutes: No - Role Details: 6P6C motor jack; physical contact 3 is the M\+ net\-name convention and contact 4 is M\-; contacts 1, 2, 5, and 6 are intentionally NC\. H\-bridge drive reverses instantaneous voltage polarity\. - Manufacturer Part Number: PLACEHOLDER\-CB\-6P6C\-12MM\-STAGGER - Functional Group: Motor Outputs **Pins:** - CONTACT\_1 [pin 1] - CONTACT\_2 [pin 2] - CONTACT\_3 [pin 3] - CONTACT\_4 [pin 4] - CONTACT\_5 [pin 5] - CONTACT\_6 [pin 6] ### J6 — 1729128\-CB - Mount: Through Hole - Role Details: Pin 1 = \+8 V motor input; pin 2 = GND\. - Functional Group: 8 V Motor Power Input - Manufacturer Part Number: 1729128 - Manufacturer Name: Phoenix Contact - Datasheet URL: http://www\.phoenixcontact\.net/product/1729128 - Role: 8 V Motor Power Input - Exclude from Pick & Place: true **Pins:** - 1 [pin 1] - 2 [pin 2] ### J7 — 1729128\-CB - Mount: Through Hole - Role: 5 V Logic Power Input - Role Details: Pin 1 = regulated \+5 V logic input; pin 2 = GND\. - Manufacturer Part Number: 1729128 - Exclude from Pick & Place: true - Manufacturer Name: Phoenix Contact - Datasheet URL: http://www\.phoenixcontact\.net/product/1729128 - Functional Group: 5 V Logic Power Input **Pins:** - 1 [pin 1] - 2 [pin 2] ### LED1 — LTL\-4233\-CB - Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/user\-uploaded/d2077a2a6e33eb90abd1e7bb7be3db8107cf01a22c759f49eef623152f1b7e8e\.pdf - Functional Group: 5 V Logic Power Indicator - Role Details: Green 5 V power indicator; anode from R1, cathode to GND\. - Exclude from Pick & Place: true - Manufacturer Part Number: LTL\-4233 - Mount: Through Hole - Manufacturer Name: Lite\-On - Current Rating: 20mA - Compliance: Green - Role: Power Indicator - Part Type: Optoelectronic Devices - Forward Voltage: 2\.1V **Pins:** - A [pin 2] - K [pin 1] ### U1 — ESP32\-DEVKITC\-VE\-SOCKET\-24\.75MM - Manufacturer Part Number: ESP32\-DEVKITC\-VE - Manufacturer Name: Espressif Systems - Mount: Socket - Role: Socketed Controller Module - Datasheet URL: https://docs\.espressif\.com/projects/esp\-idf/en/latest/esp32/hw\-reference/esp32/get\-started\-devkitc\.html - Functional Group: ESP32 Socket - Role Details: ESP32\-DEVKITC\-VE, 38 pins; clean pad\-only 2\.54 mm socket footprint with measured 24\.75 mm row spacing - Part Type: Development Boards **Pins:** - 3V3 [pin 1] - 5V [pin 19] - CLK [pin 20] - CMD [pin 18] - D0 [pin 21] - D1 [pin 22] - D2 [pin 16] - D3 [pin 17] - EN [pin 2] - GND\_1 [pin 14] - GND\_2 [pin 32] - GND\_3 [pin 38] - IO0 [pin 25] - IO12 [pin 13] - IO13 [pin 15] - IO14 [pin 12] - IO15 [pin 23] - IO16 [pin 27] - IO17 [pin 28] - IO18 [pin 30] - IO19 [pin 31] - IO2 [pin 24] - IO21 [pin 33] - IO22 [pin 36] - IO23 [pin 37] - IO25 [pin 9] - IO26 [pin 10] - IO27 [pin 11] - IO32 [pin 7] - IO33 [pin 8] - IO34 [pin 5] - IO35 [pin 6] - IO4 [pin 26] - IO5 [pin 29] - RX [pin 34] - TX [pin 35] - VN [pin 4] - VP [pin 3] ### U2 — POLOLU\-713\-TB6612FNG\-SOCKET\-14\.75MM - Datasheet URL: https://www\.pololu\.com/product/713 - Role Details: Pololu \#713 TB6612FNG carrier; clean pad\-only 2\.54 mm socket footprint with measured 14\.75 mm row spacing - Functional Group: Driver 1 - Manufacturer Part Number: 713 - Mount: Socket - Part Type: Module - Manufacturer Name: Pololu - Role: Socketed Motor Driver Module **Pins:** - AIN1 [pin 14] - AIN2 [pin 15] - AO1 [pin 3] - AO2 [pin 4] - BIN1 [pin 12] - BIN2 [pin 11] - BO1 [pin 6] - BO2 [pin 5] - GND [pin 1] - GND [pin 9] - GND [pin 8] - PWMA [pin 16] - PWMB [pin 10] - STBY [pin 13] - VCC [pin 2] - VMOT [pin 7] ### U3 — POLOLU\-713\-TB6612FNG\-SOCKET\-14\.75MM - Datasheet URL: https://www\.pololu\.com/product/713 - Manufacturer Part Number: 713 - Role Details: Pololu \#713 TB6612FNG carrier; clean pad\-only 2\.54 mm socket footprint with measured 14\.75 mm row spacing - Functional Group: Driver 2 - Mount: Socket - Role: Socketed Motor Driver Module - Part Type: Module - Manufacturer Name: Pololu **Pins:** - AIN1 [pin 14] - AIN2 [pin 15] - AO1 [pin 3] - AO2 [pin 4] - BIN1 [pin 12] - BIN2 [pin 11] - BO1 [pin 6] - BO2 [pin 5] - GND [pin 1] - GND [pin 9] - GND [pin 8] - PWMA [pin 16] - PWMB [pin 10] - STBY [pin 13] - VCC [pin 2] - VMOT [pin 7] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://flux\.ai/ayushkh/chakra\-brain\~vb](https://flux.ai/ayushkh/chakra-brain~vb).* --- *Generated from [https://flux\.ai/ayushkh/chakra\-brain\~vb](https://flux.ai/ayushkh/chakra-brain~vb)*