HardLabs

Triac driver

erikbeerepoot·bramble·schematics/bramble-fan-control/triac_driver.kicad_pcb

Triac driver PCB layout, top view — open source RP2040/RP2350 board by erikbeerepoot

About the Triac driver PCB

Triac driver is an open source RP2040/RP2350 PCB design by erikbeerepoot, published on GitHub. It is a 2-layer board measuring 96 × 90 mm, with 42 components from 33 distinct parts.

Its main chip is the RP2350_80QFN, from the RP2040/RP2350 family. Other key parts include the C2902316, STM32L031F6P6TR, MCP1700X-120XXMB, FM24CL16B-GTR and C5356643. By type, the board carries 16 resistors, 8 capacitors, 6 ICs, 5 connectors, 2 transistors and 2 switches.

It belongs with the rf & radio and sensors designs in this gallery.

From the project

Bramble: Precision Agriculture Mesh

LoRa sensor and actuator network for farm monitoring, built on RP2040.

Hub-and-spoke architecture: a central hub manages the network while nodes collect sensor data (temperature, humidity) and control actuators (irrigation valves). LoRa provides long-range wireless with reliable delivery guarantees.

- Adafruit Feather RP2040 LoRa (SX1276, 915 MHz) - MT25QL01GBBB 128MB external flash for sensor data storage - STM32L010 PMU for power management and sleep

Main components on the Triac driver

C2902316STM32L031F6P6TRMCP1700X-120XXMBFM24CL16B-GTRC5356643RP2350_80QFN

Triac driver bill of materials (BOM)

42 components, 33 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
C2902316
MOC3021
U1
1
STM32L031F6P6TR
MOC3021
U2
1
MCP1700X-120XXMB
H11AA1
U3
1
FM24CL16B-GTR
H11AA1
U4
1
C5356643
ADuM1201AR
U5
1
RP2350_80QFN
STM32L031F6P6TR
U6
2
BTA16-600SW3G
Q1, Q2
1
CONN_01X05_PIN
Conn_01x03_Pin
J1
1
C160389
FAN_1
J2
1
C160389
FAN_2
J3
1
Conn_01x04_Pin
J4
1
USB_C_RECEPTACLE_USB2.0_16P
Conn_01x05_Pin
J5
1
IRM-02-3.3S
PS1
1
R_Potentiometer_US
RV1
1
C528967
SW_Rotary_1x3_MP
SW1
1
C528967
STM_RESET
SW2
1
1N4148W
LED_Dual_AKA
D1
1
10UF
10uF
C1
1
22UF
100nF
C2
1
4.7UF
100nF
C3
Show 13 more
QtyPartRefs
2
100NF
100nF
C4, C8
1
100NF
4.7uF
C5
2
1UF
100nF
C6, C7
1
180
R1
1
100
180
R2
1
330
R3
1
0.1
330
R4
3
10K
10k
R5, R9, R10
3
10k
R6, R13, R16
1
20K
10k
R7
1
8.2K
10k
R8
2
10K
150
R11, R12
2
100
10k
R14, R15

Triac driver design files

The KiCad project lives in the erikbeerepoot/bramble repository on GitHub; these links point at the commit this page was built from.

Triac driver: common questions

What microcontroller does the Triac driver use?

The Triac driver is built around the RP2350_80QFN, from the RP2040/RP2350 family.

How big is the Triac driver PCB?

The Triac driver measures 96 × 90 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Triac driver?

42 components, from 33 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 Triac driver design files?

From the erikbeerepoot/bramble 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 Triac driver design in my own project?

The repository has no license, so all rights stay with erikbeerepoot. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Triac driver without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.

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