HardLabs

Frontpanel

frep·kicad·projects/LabBenchPsu/RevB/frontpanel/frontpanel.kicad_pcb

Frontpanel PCB layout, top view — open source ESP8266 board by frep

About the Frontpanel PCB

Frontpanel is an open source ESP8266 PCB design by frep, published on GitHub. It is a 2-layer board measuring 150 × 100 mm, with 74 components from 35 distinct parts.

Its main chip is the esp8266Feather, from the ESP8266 family. Other key parts include the TPS2513, AZ1117, MCP73833, AD5274 and MCP23017. By type, the board carries 23 resistors, 15 connectors, 11 capacitors, 9 diodes, 8 ICs and 3 fuses.

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

From the project

workspace for kicad projects

Working: -------- reading buttons and encoders over gpio-expander TPS2513: Loading iPhone (1A), iPad (1.5A)

Not working: ------------ LiPo charging indicators (2 leds) worked first, but not anymore. Maybe too low current resistor used? Load on indicator on the gpio-expander not working. Probably signal too low since it's taken after loadOn-diode.

More or less working: --------------------- * LiPo charger with different load currents works up to about 500mA. Imo it should work up to 1000mA.

Main components on the Frontpanel

TPS2513AZ1117esp8266FeatherMCP73833AD5274MCP23017

Frontpanel bill of materials (BOM)

74 components, 35 distinct parts — part numbers from the project's BOM.

QtyPartRefs
3
TPS2513
U1, U2, U3
1
AZ1117
U4
1
esp8266Feather
U5
1
MCP73833
U6
1
AD5274
U7
1
MCP23017
U8
3
USB-A-stacked
CON1, CON2, CON3
1
INPUT_TERMINAL
P1
3
CONN_2
P6, P7, P12
5
BindingPost
P8, P10, P13, P14, P15
1
OnOffSwitch
P9
1
LoadSwitch
P11
1
NHD-1.69-160128UGC3
P17
2
RotaryEncoder
ENC1, ENC2
3
FUSE
F1, F2, F3
1
JUMPER3
JP1
1
JUMPER
JP2
1
TERMINAL
K1
1
PowerGood
D1
1
MainsOn
D2
Show 15 more
QtyPartRefs
1
LoadOn
D3
1
Charged
D4
1
Charging
D5
2
DIODE
D6, D7
2
DIODE
D8, D9
2
4u7F
C1, C2
3
1uF
C3, C4, C5
1
10uF
C6
1
100nF
C7
4
10nF
C8, C9, C10, C11
4
1K
R1, R2, R6, R18
1
10R 10W
R3
2
270
R4, R5
15
10K
R7, R8, R9, R10, R11, R12, R13, R14 +7
1
200
R23

Frontpanel design files

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

Frontpanel: common questions

What microcontroller does the Frontpanel use?

The Frontpanel is built around the esp8266Feather, from the ESP8266 family.

How big is the Frontpanel PCB?

The Frontpanel measures 150 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Frontpanel?

74 components, from 35 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 Frontpanel design files?

From the frep/kicad repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Frontpanel design in my own project?

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

Can I test firmware for the Frontpanel 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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