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Wiscale hw

makerspacelt·wiscale-hw·project/wiscale.kicad_pcb

Wiscale hw PCB layout, top view — open source ESP8266 board by makerspacelt
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About the Wiscale hw PCB

Wiscale hw is an open source ESP8266 PCB design by makerspacelt, published on GitHub. It is a 2-layer board measuring 100 × 50 mm, with 107 components from 32 distinct parts.

Its main chip is the ESP-12E, from the ESP8266 family. Other key parts include the BMS_USB_LiPo_Charger, TPL5110, AMS1117-3.3, HX711 and DS18B20Z. By type, the board carries 39 resistors, 34 capacitors, 11 ICs, 7 connectors, 5 transistors and 4 diodes.

It belongs with the power & battery designs in this gallery.

From the project

This is ESP8266 (ESP-12F) and HX711 based weight monitoring device.

This is ESP8266 (ESP-12F) and HX711 based weight monitoring device.

Designed to be pretty small. Supports multiple load cells. Can be populated with 18650 battery Can be operated in ultra low power mode

Dev NOTE: before commit, run ./kibot.sh to regenerate documentation, bom, gerbers and other assets.

schematics.pdf pcb.pdf with dimensions ibom.html gerbers.zip

Wiscale hw, from the project README
From the project README

Main components on the Wiscale hw

ESP-12EBMS_USB_LiPo_ChargerTPL5110AMS1117-3.3HX711DS18B20ZDS18B20

Wiscale hw bill of materials (BOM)

107 components, 32 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ESP-12E
ESP-7(S) or ESP-12*
U201
1
BMS_USB_LiPo_Charger
U301
1
TPL5110
U302
1
AMS1117-3.3
U303
3
HX711
U401, U501, U601
2
DS18B20Z
U701, U801
2
DS18B20
U702, U802
5
AO3401A
Q301, Q302, Q401, Q501, Q601
1
C165948
USB_POWER_IN
J301
3
S4B-XH-SM4-TB(LF)(SN)
cell
J401, J501, J601
2
DS18B20
J701, J801
1
I2C
i2c
J901
1
BH-18650-B1BA002
18650
BT301
1
JK-nSMD100/16V
PTC 1A
F301
1
MSK12C02
SW_SPDT
SW301
1
btn
SW302
1
XL-2012UBC
BLUE
D201
2
C2908120
1N4148WL
D301, D302
1
XL-2012UBC
GREEN
D303
3
bead
FB401, FB501, FB601
Show 12 more
QtyPartRefs
15
100N
100n
C201, C202, C204, C305, C306, C401, C403, C405 +7
11
10U
10u
C203, C301, C302, C307, C308, C404, C407, C504 +3
2
GRM31CR61A107ME05L
100u
C303, C304
6
1u
C402, C406, C502, C506, C602, C606
9
180K
180k
R201, R302, R305, R403, R406, R503, R506, R603 +1
2
47K
47k
R202, R301
3
10K
10k
R203, R205, R206
11
100
R207, R307, R401, R402, R405, R501, R502, R505 +3
2
DNP
R303, R306
1
15K
15k
R304
8
4K7
4k7
R308, R309, R310, R311, R701, R801, R901, R902
3
200K
200k
R404, R504, R604

Wiscale hw design files

The KiCad project lives in the makerspacelt/wiscale-hw repository on GitHub; these links point at the commit this page was built from.

Wiscale hw: common questions

What microcontroller does the Wiscale hw use?

The Wiscale hw is built around the ESP-12E, from the ESP8266 family.

How big is the Wiscale hw PCB?

The Wiscale hw measures 100 × 50 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Wiscale hw?

107 components, from 32 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 Wiscale hw design files?

From the makerspacelt/wiscale-hw 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 Wiscale hw design in my own project?

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

Can I test firmware for the Wiscale hw without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP8266 firmware against it before you order a PCB.

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