HardLabs

Lichtenprog

cr1tbit·lichtenprog

Lichtenprog PCB layout, top view — open source board by cr1tbit

About the Lichtenprog PCB

Lichtenprog is an open source PCB design by cr1tbit, published on GitHub under the CERN-OHL-P-2.0 license. It is a 4-layer board measuring 28 × 28 mm, with 69 components from 44 distinct parts.

Other key parts include the SPX3819M5-L, MCP6L04X-XSL, USBLC6-2SC6, SN74LVC1T45DBV and TLV62568DRL. By type, the board carries 31 resistors, 11 LEDs, 11 capacitors, 9 ICs, 5 connectors and 1 crystal.

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

From the project

USB-to-UART / (esp8266 / esp32) programmer with 3.3v supply

The device is based on CP2102n - meaning it should work properly on any OS without messy drivers from unknown sources. It's also cheaper than legit FT232 chips.

Why can't I power my stuff from basic USB-to-UART bridges? Some of those serial adapters out there have basic 3.3V-out bulitin, coming usually from main IC's LDO output. Being able to supply like 100 miliamps. I want my full 500mA from the USB! Seriously, throwing that external LDO costs like 10 cents.

Lichtenprog, from the project README
From the project README

Main components on the Lichtenprog

SPX3819M5-LMCP6L04X-XSLUSBLC6-2SC6SN74LVC1T45DBVTLV62568DRLMT9700INA3221USBLC6-4SC6

Lichtenprog bill of materials (BOM)

69 components, 44 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
SPX3819M5-L
USBLC6-4SC6
U1
1
MCP6L04X-XSL
CH334F
U2
1
USBLC6-2SC6
~
U3
1
SN74LVC1T45DBV
CP2102N-Axx-xQFN24
U5
1
TLV62568DRL
U8
2
MT9700
U9, U11
1
INA3221
U13
1
USBLC6-4SC6
U15
1
Crystal_GND24
Y1
1
USB_C_RECEPTACLE_USB2.0
USB_C_Receptacle_USB2.0
J1
1
C0000
IO_OUT
J2
1
USB_C_Receptacle_USB2.0
J3
1
Conn_02x08_Odd_Even
J4
1
Conn_01x02
J5
11
XL-1606UGC
LED1, LED2, LED3, LED4, LED5, LED6, LED7, LED8 +3
1
2.2uH
L2
1
2.2U
10u
C1
3
100N
100n
C4, C7, C8
2
2.2U
2.2u
C5, C6
2
100N
2.2u
C9, C11
Show 24 more
QtyPartRefs
1
100N
10u
C10
2
10U
100n
C12, C13
3
5.1k
R1, R27, R28
1
2R/1206
22k
R2
2
470
5.1k
R3, R4
2
22K
3k
R5, R25
1
47K
3k
R6
1
18K
3k
R7
1
220
47k
R8
1
330
1k
R9
1
1.5K
1k
R10
1
3.3K
1k
R11
1
22K
50mR/1206
R12
1
47K
47k
R13
2
22K
22k
R14, R23
1
47K
50mR/1206
R15
1
50mR/1206
R16
2
47k
R17, R19
1
10k
R18
2
330
22k
R20, R22
2
3k
R21, R26
1
10K
3k
R24
1
1k
R29
2
22k
R30, R31

Lichtenprog design files

The KiCad project lives in the cr1tbit/lichtenprog repository on GitHub; these links point at the commit this page was built from.

Lichtenprog: common questions

How big is the Lichtenprog PCB?

The Lichtenprog measures 28 × 28 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Lichtenprog?

69 components, from 44 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 Lichtenprog design files?

From the cr1tbit/lichtenprog 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 Lichtenprog design in my own project?

Yes, under the terms of its CERN-OHL-P-2.0 license, which cr1tbit chose for the repository.

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