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ESP-Mini-Base

juepi·ESP-Mini-Base

ESP-Mini-Base PCB layout, top view — open source board by juepi

About the ESP-Mini-Base PCB

ESP-Mini-Base is an open source PCB design by juepi, published on GitHub. It is a 2-layer board measuring 76.2 × 47.6 mm, with 73 components from 28 distinct parts.

Other key parts include the LM2940IMP-5.0/NOPB, G3VM-61VY2, TPS22918DBVR, S2 Mini and TXB0104RGY. By type, the board carries 20 resistors, 19 jumpers, 14 connectors, 10 capacitors, 6 ICs and 3 transistors.

It belongs with the power & battery and dev boards & breakouts designs in this gallery.

From the project

Base PCB ("hat") for ESP boards in WEMOS Mini format

The board provides the following functions:

3x N-Channel MOSFET drains (20A / 20Vds; no more than 5A recommended) 1x AC/DC SSR (48Vpp, 500mA max.) 1x Supply switch (5V or 3.3V, 2A max.) 2x 4-channel Level shifters to 5V 1x ADC attenuator with input selection (3V3 rail, 5V rail or external pin) 1x Pushbutton 3V3 and 5V I2C Pullups for default I2C pins of S2 and D1 Mini 5V LDO linear regulator for power supply up to 12V

ESP-Mini-Base, from the project README
From the project README

Main components on the ESP-Mini-Base

LM2940IMP-5.0/NOPBG3VM-61VY2TPS22918DBVRS2 MiniTXB0104RGY

ESP-Mini-Base bill of materials (BOM)

73 components, 28 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
LM2940IMP-5.0/NOPB
LM2940IMP-5.0_NOPB
IC1
1
G3VM-61VY2
U1
1
TPS22918DBVR
U2
1
S2 Mini
U3
2
TXB0104RGY
U4, U5
3
AO4402G
Q1, Q2, Q3
2
SCREW_TERMINAL_01X03
Screw_Terminal_01x03
J1, J9
6
~
J2, J3, J4, J5, J6, J14
1
CONN_01X02
Conn_01x02
J7
2
CONN_01X16
Conn_01x16
J8, J11
1
CONN_01X03
Conn_01x03
J10
2
CONN_01X06
Conn_01x06
J12, J13
6
SOLDERJUMPER_3_OPEN
SolderJumper_3_Open
JP1, JP4, JP5, JP10, JP18, JP19
13
—
JP2, JP3, JP6, JP7, JP8, JP9, JP11, JP12 +5
1
SW_OMRON_B3FS
SW_Omron_B3FS
SW1
6
100N/25V
100n/25V
C1, C4, C7, C8, C9, C10
1
C967571
1µ/25V
C2
1
1N/25V
1n/25V
C3
1
470NF/50V
470nF/50V
C5
1
C171666
100µF/16V
C6
Show 8 more
QtyPartRefs
4
3K3
3k3
R1, R2, R7, R8
5
10K
10k
R3, R4, R5, R6, R12
1
C186350
12k/0.1%
R9
1
C186338
3k6/0.1%
R10
1
220
R11
2
931
R13, R15
2
1K8
1k8
R14, R16
4
4K7
4k7
R17, R18, R19, R20

ESP-Mini-Base design files

The KiCad project lives in the juepi/ESP-Mini-Base repository on GitHub; these links point at the commit this page was built from.

ESP-Mini-Base: common questions

How big is the ESP-Mini-Base PCB?

The ESP-Mini-Base measures 76.2 × 47.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the ESP-Mini-Base?

73 components, from 28 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 ESP-Mini-Base design files?

From the juepi/ESP-Mini-Base 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 ESP-Mini-Base design in my own project?

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

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