GlucoBit
About the GlucoBit PCB
GlucoBit is an open source ESP32 PCB design by jdharcourt, published on GitHub. It is a 4-layer board measuring 55 × 30.4 mm, with 43 components from 29 distinct parts.
Its main chip is the ESP32-S3-WROOM-1-N8, from the ESP32 family. Other key parts include the BQ24040DSQR, TLV75801PDBVR, USBLC6-2SC6, MAX98357AETE+T and 08JQ-BT. By type, the board carries 15 resistors, 13 capacitors, 6 ICs, 4 connectors, 3 diodes and 2 switches.
It belongs with the iot & wireless, audio and displays & leds designs in this gallery.
From the project
A Low Cost IoT system for Non-Invasive Glucose Visualisation
A CircuitPython glucose monitoring display that fetches readings from the Dexcom Share API and shows them on a colour LCD. Plays audio alarms and flashes an LED when glucose goes out of range.
GlucoBit is a standalone glucose visualisation and alert device. The product aims to solve some of the daily issues faced by Type 1 Diabetics. At present, CGMs (Continuous Glucose Monitors) send glucose data to a smartphone, where the user can access their current levels and receive alerts for low and high blood sugar events, however, missed hypoglycemic alarms, alarm fatigue, and an over-reliance on…
Main components on the GlucoBit
GlucoBit bill of materials (BOM)
43 components, 29 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ESP32-S3-WROOM-1-N8 Espressif Systems | ESP32-S3-WROOM-1 | U1 |
| 1 | BQ24040DSQR Texas Instruments | DSQ10_P9X1P5 | U2 |
| 1 | TLV75801PDBVR TLV75801PDBV Texas Instruments | SOT-23-5 | U3 |
| 1 | USBLC6-2SC6 Shenzhen Slkormicro Semicon Co., Ltd. | SOT95P280X145-6N | U4 |
| 1 | MAX98357AETE+T Analog Devices Inc./Maxim Integrated | DAC | U5 |
| 1 | 08JQ-BT JST Sales America Inc. | JSTx8 | U6 |
| 1 | USB-C-P16 | USB-C-P16 | J1 |
| 2 | B2B-PH-K-S JST Sales America Inc. | JST_B2B-PH-K-S | J2, J6 |
| 1 | CONN_01X02_SOCKET Conn_01x02_Socket | PinSocket_1x02_P2.54mm_Vertical | J3 |
| 1 | NC7SZ175P6X RESET onsemi | PTS810_CNK | SW1 |
| 1 | PD-CAP-1/8-0 BOOT TE Connectivity Raychem Cable Protection | PTS810_CNK | SW2 |
| 3 | UHD111A-FKA-C3K23E1L3VG5ZB3Z3 LED Cree LED | LED_0805_2012Metric | D1, D2, D3 |
| 2 | CL05B104KP5NNNC 1uF Samsung Electro-Mechanics | C_0805_2012Metric | C1, C2 |
| 2 | CL05B104KP5NNNC 1uF Samsung Electro-Mechanics | R_0603_1608Metric | C3, C4 |
| 1 | GRM155R60J106ME05D 10uF Murata Electronics | C_0805_2012Metric | C5 |
| 2 | GRM155R60J106ME05D 10uF Murata Electronics | C_1206_3216Metric | C6, C8 |
| 1 | CL05B104KP5NNNC 0.1uF Samsung Electro-Mechanics | C_0603_1608Metric | C7 |
| 2 | CL05B104KP5NNNC 0.1uF Samsung Electro-Mechanics | C_0805_2012Metric | C9, C10 |
| 1 | CL10E104KC8VPNC 100nF Samsung Electro-Mechanics | C_0603_1608Metric | C11 |
| 2 | C0603C221K5RACTU 220pF KEMET | C_0603_1608Metric | C12, C13 |
Show 9 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | RC0402FR-071ML 1M YAGEO | R_0603_1608Metric | R1 |
| 1 | CRCW08051K00FKEA 51k Vishay Dale | R_0603_1608Metric | R2 |
| 4 | RC0603FR-0710KL 10k YAGEO | R_0603_1608Metric | R3, R11, R15, R16 |
| 1 | RC0402FR-072KL 2k YAGEO | R_0603_1608Metric | R4 |
| 2 | 150 Keystone Electronics | R_0603_1608Metric | R5, R6 |
| 1 | 100 Keystone Electronics | R_0603_1608Metric | R7 |
| 2 | ERJ-2RKF5101X 5.1k Panasonic Industry | R_0603_1608Metric | R8, R9 |
| 2 | RC0402FR-07100KL 100k YAGEO | R_0603_1608Metric | R10, R13 |
| 1 | CRCW040220K0FKED 220k Vishay Dale | R_0603_1608Metric | R14 |
GlucoBit design files
The KiCad project lives in the jdharcourt/GlucoBit repository on GitHub; these links point at the commit this page was built from.
GlucoBit: common questions
What microcontroller does the GlucoBit use?
The GlucoBit is built around the ESP32-S3-WROOM-1-N8, from the ESP32 family.
How big is the GlucoBit PCB?
The GlucoBit measures 55 × 30.4 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the GlucoBit?
43 components, from 29 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 GlucoBit design files?
From the jdharcourt/GlucoBit 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 GlucoBit design in my own project?
The repository has no license, so all rights stay with jdharcourt. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the GlucoBit without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.
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