Coin LRA, VG0832022D 8 mm and VG1040003D 10 mm mix
20
3.00
60.00
DRV2605L driver
20
2.00
40.00
TCA9548A multiplexer
3
1.50
4.50
VL53L8CX time of flight module
2
12.00
24.00
RD-03D radar
1
12.00
12.00
JSN-SR04T sonar
2
5.00
10.00
BNO085 IMU
1
15.00
15.00
RP2350 board
1
5.00
5.00
ESP32-S3 board
1
6.00
6.00
LiPo 3.7 V about 4000 mAh with protection and charger
1
12.00
12.00
Boost, PMIC, passives, PCBs
1
8.00
8.00
Connectors, cable, magnetic breakaways
1 set
8.00
8.00
Printed pods, PETG and skin safe TPU
1 set
8.00
8.00
Bands, webbing, closures, chest mount
1 set
10.00
10.00
Total, working
not published
What the phone saves
Compute path
Camera
Compute
Extra battery
Wearer's own phone (chosen)
owned
owned
owned
Raspberry Pi 5 with Camera Module 3 and battery
about 25
about 80
about 20
Jetson Orin Nano with camera and battery
about 25
about 249 to 499
about 25
Source: docs/17-bill-of-materials.md, the engineering record. Every number on this page is read from that file. If a fact is not in the record, it is measured on the bench, or it stays off this site.