HardLabs

12V-SmartSwitch

vintlabs·ESP32-PWM-Driver-Devkit

12V-SmartSwitch PCB layout, top view — open source ESP32 board by vintlabs

About the 12V-SmartSwitch PCB

12V-SmartSwitch is an open source ESP32 PCB design by vintlabs, published on GitHub. It is a 2-layer board measuring 73 × 50 mm, with 74 components from 23 distinct parts.

Its main chip is the ESP32-WROOM-32, from the ESP32 family. Other key parts include the CP2102N-A01-GQFN24 and AP1117-33. By type, the board carries 29 resistors, 18 transistors, 11 capacitors, 6 connectors, 5 diodes and 3 ICs.

It belongs with the iot & wireless and usb & debug tools designs in this gallery.

From the project

ESP WROOM-32 DevKit with 8 2A PWM Drivers (5-15V)

The PWM driver board is powered by an ESP32 and features 8 PWM outputs that can power LED lighting at 5-15V at up to 2A each. It can also be used as a general-purpose ESP32 development kit.

The primary purpose of the design is to control LED lighting (like these: https://www.amazon.ca/gp/product/B00QN4X5MM/ref=ppxyodtbsearchasintitle?ie=UTF8&psc=1 I am not affiliated with this seller, but the LED strips are great!), however there may be many other uses, like controlling DC motors! The board can be powered by either USB or by connecting 5-15V to the power input connector (connecting both is…

12V-SmartSwitch, from the project README
From the project README

Main components on the 12V-SmartSwitch

CP2102N-A01-GQFN24ESP32-WROOM-32AP1117-33

12V-SmartSwitch bill of materials (BOM)

74 components, 23 distinct parts.

QtyPartRefs
1
CP2102N-A01-GQFN24
U1
1
ESP32-WROOM-32
U2
1
AP1117-33
U3
8
DMG2305UX
Q1, Q2, Q5, Q6, Q9, Q10, Q14, Q15
10
MMBT2222A
Q3, Q4, Q7, Q8, Q11, Q12, Q13, Q16 +2
1
Screw_Terminal_01x02
J1
1
USB_B_Micro
J3
1
Conn_01x06_Male
J4
2
Conn_01x16_Male
J5, J7
1
Conn_01x09_Male
J6
2
SW_Push
SW1, SW2
1
SP0503BAHT
D1
3
LED
D2, D3, D5
1
1N5819
D4
5
10u
C1, C3, C5, C6, C11
5
0.1u
C2, C4, C7, C8, C9
1
47u
C10
9
1k
R1, R2, R3, R8, R9, R14, R15, R21 +1
13
10k
R4, R5, R10, R11, R16, R17, R19, R20 +5
1
22.1k
R6
Show 3 more
QtyPartRefs
1
47.5k
R7
3
2.2k
R12, R13, R18
2
R
R27, R28

12V-SmartSwitch design files

The KiCad project lives in the vintlabs/ESP32-PWM-Driver-Devkit repository on GitHub; these links point at the commit this page was built from.

12V-SmartSwitch: common questions

What microcontroller does the 12V-SmartSwitch use?

The 12V-SmartSwitch is built around the ESP32-WROOM-32, from the ESP32 family.

How big is the 12V-SmartSwitch PCB?

The 12V-SmartSwitch measures 73 × 50 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the 12V-SmartSwitch?

74 components, from 23 distinct parts. The full bill of materials is listed on this page.

Where can I download the 12V-SmartSwitch design files?

From the vintlabs/ESP32-PWM-Driver-Devkit repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the 12V-SmartSwitch design in my own project?

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

Can I test firmware for the 12V-SmartSwitch without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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