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IoT12 Control Board

atoomnetmarc·IoT12·hardware/Control Board/IoT12 Control Board.kicad_pcb

IoT12 Control Board layout, top view — open source ESP32 board by atoomnetmarc
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About the IoT12 Control Board

IoT12 Control Board is an open source ESP32 PCB design by atoomnetmarc, published on GitHub under the Apache-2.0 license. It is a 2-layer board measuring 99.1 × 69.9 mm, with 66 components from 34 distinct parts.

Its main chip is the 2x Conn_01x19_Female, from the ESP32 family. Other key parts include the W25Q64FVSSIG, ADS1115IDGS, INA826AID, MAX809S and max98357. By type, the board carries 34 resistors, 9 capacitors, 8 diodes, 5 ICs, 5 connectors and 3 modules.

It belongs with the iot & wireless, sensors and audio designs in this gallery.

From the project

Schematic, PCB files, firmware and 3d models for creating the IoT12 solder iron temperature controller for T12 compatible tips.

Use the interactive BOM to identify values and positions of the components.

Solder all small 0805 SMD resistors and capacitors. Read special instructions for R60, R61 and R62, R63 in the schematic.

Measure all resistors and check if they are all the correct resistance.

Inspect PCB with microscope for shorted pins (in ICs). Correct when found.

Apply current limited 5V to GND and +5V on J4. Almost no current should flow.

Main components on the IoT12 Control Board

W25Q64FVSSIGADS1115IDGSINA826AIDMAX809S2x Conn_01x19_Femalemax98357SAMD21_breakout

IoT12 Control Board bill of materials (BOM)

66 components, 34 distinct parts.

QtyPartRefs
1
W25Q64FVSSIG
U1
1
ADS1115IDGS
U2
2
INA826AID
U3, U4
1
MAX809S
U5
1
2x Conn_01x19_Female
A1
1
max98357
A2
1
SAMD21_breakout
A3
1
MMBT2222
Q1
1
AOD403
Q10
1
IDC-Header_2x07_P2.54mm
J1
1
JST B2B-XH-A
J2
1
JST B4B-XH-A
J4
1
JST B5B-XH-A
J5
1
JST B6B-XH-A
J6
4
BAV99
D1, D2, D3, D4
1
BZX84C18
D10
1
Red
D20
1
SS14
D30
1
SS34
D40
1
100pF
C10
Show 14 more
QtyPartRefs
2
1nF
C20, C21
4
100nF
C30, C31, C32, C33
2
100uF/35V
C60, C61
1
0R005
R1
4
100R
R2, R10, R11, R12
1
470R 1%
R21
1
1k 1%
R30
3
1k
R31, R32, R33
1
4k7 1%
R40
8
4k7
R41, R42, R43, R44, R47, R48, R49, R50
5
10k 0.1%
R60, R61, R62, R63, R64
1
100k 1%
R70
8
100k
R71, R72, R73, R74, R75, R76, R77, R78
1
560k
R80

IoT12 Control Board design files

The KiCad project lives in the atoomnetmarc/IoT12 repository on GitHub; these links point at the commit this page was built from.

IoT12 Control Board: common questions

What microcontroller does the IoT12 Control Board use?

The IoT12 Control Board is built around the 2x Conn_01x19_Female, from the ESP32 family.

How big is the IoT12 Control Board?

The IoT12 Control Board measures 99.1 × 69.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the IoT12 Control Board?

66 components, from 34 distinct parts. The full bill of materials is listed on this page.

Where can I download the IoT12 Control Board design files?

From the atoomnetmarc/IoT12 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the IoT12 Control Board design in my own project?

Yes, under the terms of its Apache-2.0 license, which atoomnetmarc chose for the repository.

Can I test firmware for the IoT12 Control Board 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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