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Open Source Smart Glasses

Mentra-Community·OpenSourceSmartGlasses·electronics_and_firmware/OSSG_v0p5/OSSG_v0p5.kicad_pcb

Top view of the Open Source Smart Glasses PCB
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Open Source Smart Glasses is an open source RP2040/RP2350 PCB design by Mentra-Community: a 4-layer, 93 × 10.5 mm board with 80 components (57 distinct parts). It is built around the SPH0645LMH, 1904-1029-1-ND, CH9102F, XC61CC3002MR and more. Filed under wearables and power & battery and sensors.

Open Source smart glasses designed to be 1. All day wearable 2. Immediately useful 3. Extendable for makers, startups, and everyone else.

This version was an attempt to use a 2P battery pack.

First batch sent off for production: 2022-09-22 for Australian delivery, assembling and testing - fix missing missing ESP32_VDD3P3 connection - solder connector pads for i2S microphones (non PDM) - onboard PDM (over i2S) microphone - 2P battery configuration - 2P battery charger - MAX17048 Li battery fuel gauge - power on/off switch - USB 1A resetable fuse - auto switch off when battery pack goes below 2.7V - SY7088 3V to 5V at 1A DC-DC Boost converter - provision for WS2812B-2020 RGB LED as visual feed back to wearer with connector for…

Built around

SPH0645LMH1904-1029-1-NDCH9102FXC61CC3002MRAP5054HTCMAX17048NCP167BMX330TBGSY7088LY68L6400SLIT_PSRAM

Parts list

80 components, 57 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
SPH0645LMH
U1
1
1904-1029-1-ND
ESP32-PICO-D4
U2
1
CH9102F
U3
1
XC61CC3002MR
U4
1
AP5054HTC
U5
1
MAX17048
U6
1
NCP167BMX330TBG
U7
1
SY7088
U8
1
LY68L6400SLIT_PSRAM
U9
2
2SC4617R BR
Q1, Q2
1
PMZ290UNE2YL
Q3
1
YJQD30P02A
Q4
1
PMZ350UPEYL
Q5
1
Conn_01x05_Male
J1
1
Ext RGB
J2
1
WM1399CT-ND
USB_B_Micro
J3
1
Touch
J4
1
Ext. HUD
J5
1
ANT3216LL00R2400A
AE1
1
1A
F1
Show 37 more
QtyPartRefs
1
UK-B0249-SP25Y
SW_SPST
SW1
1
Power
SW2
1
IO9
TP1
1
5V
TP2
1
EN
TP5
1
3V3
TP8
1
GND
TP9
1
IO0
TP12
1
Tx
TP13
1
Rx
TP14
1
Batt1+
TP15
1
Batt2+
TP16
1
BATT1-
TP17
1
BATT2-
TP18
1
WS2812B-2020
D1
1
Red
D2
1
RB160M-30
D3
1
1.5uH
L1
5
490-GRT155C80J105KE01JCT-ND
1uF
C1, C9, C15, C18, C20
5
100nF
C2, C7, C10, C11, C12
1
200pF
C3
3
490-GRT155C80J105KE01JCT-ND
100nF
C4, C13, C16
1
1276-1450-1-ND
10uF
C5
1
1276-1043-1-ND
100nF
C6
3
490-GRT155C80J105KE01JCT-ND
22uF
C14, C17, C19
4
RMCF0402JT10K0CT-ND
10K
R1, R4, R5, R6
2
0R*
R2, R3
3
100K
R7, R10, R21
1
2.1k
R8
1
150
R9
2
1M
R11, R12
1
470K
R13
1
147K
R14
2
4.7K
R15, R16
3
10K
R17, R18, R20
1
*10k
R19
1
NC
R22

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Earlier revisions in the repo: OSSG_v0p4, OSSG_v0p3

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