Dual h bridge
About the Dual h bridge PCB
Dual h bridge is an open source PCB design by enph253-2025-team5, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 40.9 × 101.5 mm, with 59 components from 15 distinct parts.
Other key parts include the LT1161 and MCT6. By type, the board carries 20 resistors, 18 transistors, 14 capacitors, 4 connectors and 3 ICs.
From the project
Dual h-bridge design with a PWM signal and direction bit for controlling two motors.
Dual h-bridge design with a PWM signal and direction bit for controlling two motors.
Similar to Greg Reid's 2025 h-bridge design, without relying on tripping the overcurrent protection. Instead, this design duplicates the incoming PWM signal, sends one to each of the low side h-bridge MOSFETs, then pulls the gate with the enhanced high side MOSFET low (avoiding shoot-through).
Main components on the Dual h bridge
Dual h bridge bill of materials (BOM)
59 components, 15 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LT1161 | DIP-20_W7.62mm_LongPads | U1 |
| 2 | MCT6 | DIP-8_W7.62mm_LongPads | U2, U3 |
| 6 | 2N3904 | TO-92_Inline | Q1, Q2, Q6, Q9, Q14, Q17 |
| 8 | IRFZ44 | TO-220-3_Vertical | Q3, Q4, Q7, Q8, Q11, Q12, Q15, Q16 |
| 4 | VN2222L | TO-92_Inline | Q5, Q10, Q13, Q18 |
| 1 | MOTOR0 Motor0 | JST_XH_S2B-XH-A-1_1x02_P2.50mm_Horizontal | J1 |
| 1 | MCU | JST_XH_B5B-XH-A_1x05_P2.50mm_Vertical | J2 |
| 1 | MOTOR1 Motor1 | JST_XH_S2B-XH-A-1_1x02_P2.50mm_Horizontal | J3 |
| 1 | BATT | JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J4 |
| 9 | 100NF 100nF | C_Disc_D3.0mm_W2.0mm_P2.50mm | C1, C2, C8, C9, C10, C11, C12, C13 +1 |
| 4 | 10NF 10nF | C_Disc_D3.0mm_W2.0mm_P2.50mm | C3, C4, C5, C6 |
| 1 | 47UF 47uF | CP_Radial_D5.0mm_P2.00mm | C7 |
| 12 | 10K 10k | R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal | R1, R2, R3, R4, R5, R7, R9, R11 +4 |
| 4 | 100K 100k | R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal | R6, R8, R10, R12 |
| 4 | 330R | R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal | R14, R16, R18, R20 |
Dual h bridge design files
The KiCad project lives in the enph253-2025-team5/dual-h-bridge-pcb repository on GitHub; these links point at the commit this page was built from.
Dual h bridge: common questions
How big is the Dual h bridge PCB?
The Dual h bridge measures 40.9 × 101.5 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Dual h bridge?
59 components, from 15 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Dual h bridge design files?
From the enph253-2025-team5/dual-h-bridge-pcb repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Dual h bridge design in my own project?
Yes, under the terms of its GPL-3.0 license, which enph253-2025-team5 chose for the repository.