This is the circuitry for the smart inhaler project. This utilises an HC-05 as well as a DHT22 alongside the STM32 and a LiPo battery.

Product Type: Wearable AI pendant Primary Function: Records audio, generates transcripts, and organizes information about daily interactions User Interaction: Input: Activation button Output: RGB LED ring, Bluetooth link to phone Key Features: Audio Recording: Activated by button press Transcription: Converts audio to text Sentiment Analysis: Embedded AI evaluates sentiment Information Management: Filters essential information and action items Technical Specifications Form Factor: Wearable pendant Display: RGB LED ring around the edge Sensors: 2 Microphones 1 Button Connectivity: Bluetooth for phone linkage Wi-Fi USB-C for charging Wireless Protocol: Wi-Fi, Bluetooth Battery Type: LiPo 2000 mAh Battery Life: 6 hours of continuous use Charging Method: USB-C Operating Voltage: 3.3V Operating Conditions: Temperature Range: -10°C to 70°C Humidity: 10 to 90% Software: Python for AI and processing Compliance: RoHS, FCC, CE Reliability: 20,000 hrs Life Cycle Expectancy: 10 years AI Capabilities Speech to Text Recognition: Converts audio input to written text Embedded AI Sentiment Analysis: Evaluates the mood or sentiment expressed in the text Essential Information Filtering: Identifies and segregates crucial data and actionable items Power Consumption and Efficiency Power consumption must align with battery capacity to ensure 6 hours of continuous operational use.

My version/layout of MT3608 DC-DC Step Up Converter Booster for my Lipo Charger Arduino Shield

This PCB is for a quad copter drone. The drone will use a 4S lipo battery as a power supply and each of the motors will use 30Amp ESC's. The microcontroller that handles the RF signals is a Raspberry Pi Pico.

3.7V Lipo Charger. Interfaces with MT3608 Boost Converter to convert 3.7V to 5V. Slot on top of your Arduino and charge your battery while the Arduino is plugged in. Or run your Arduino portably using the battery.

Product Type: Wearable AI pendant Primary Function: Records audio, generates transcripts, and organizes information about daily interactions User Interaction: Input: Activation button Output: RGB LED ring, Bluetooth link to phone Key Features: Audio Recording: Activated by button press Transcription: Converts audio to text Sentiment Analysis: Embedded AI evaluates sentiment Information Management: Filters essential information and action items Technical Specifications Form Factor: Wearable pendant Display: RGB LED ring around the edge Sensors: 2 Microphones 1 Button Connectivity: Bluetooth for phone linkage Wi-Fi USB-C for charging Wireless Protocol: Wi-Fi, Bluetooth Battery Type: LiPo 2000 mAh Battery Life: 6 hours of continuous use Charging Method: USB-C Operating Voltage: 3.3V Operating Conditions: Temperature Range: -10°C to 70°C Humidity: 10 to 90% Software: Python for AI and processing Compliance: RoHS, FCC, CE Reliability: 20,000 hrs Life Cycle Expectancy: 10 years AI Capabilities Speech to Text Recognition: Converts audio input to written text Embedded AI Sentiment Analysis: Evaluates the mood or sentiment expressed in the text Essential Information Filtering: Identifies and segregates crucial data and actionable items Power Consumption and Efficiency Power consumption must align with battery capacity to ensure 6 hours of continuous operational use.

The Argon is a powerful Wi-Fi enabled development board for Wi-Fi networks. It is based on the Nordic nRF52840 and has built-in battery charging circuitry so it’s easy to connect a Li-Po and deploy your local network in minutes. #Particle #Argon #Template #Iot #Project-template

A hand-solderable SMD/TH module w/ RP2040 MCU+8MB FLASH, LDO, LiPo charger. #template #part #RP2040 #RPI

The Argon is a powerful Wi-Fi enabled development board for Wi-Fi networks. It is based on the Nordic nRF52840 and has built-in battery charging circuitry so it’s easy to connect a Li-Po and deploy your local network in minutes. #Particle #Argon #Template #Iot #Project-template

Integrated 70A 3S-5S LiPo brushless ESC with STM32F405 motor control and Flysky AFHDS 2A receiver using an A7105 RF transceiver for a waterproof RC boat application.

First-pass modular AI glasses prototype with dual temple electronics, four OV5640 camera nodes, ESP32-S3 gateway, stereo bone-conduction audio, hot-swappable protected LiPo power, and a charging/storage case.

Bluetooth-connected espresso scale with load-cell measurement, local data logging, a segment-style display, USB-C charging, and single-cell LiPo power.

Rechargeable ESP32-S3 smartwatch with OLED display, USB-C LiPo charging, accelerometer, native USB programming, and low-power operation.

Left-ear prototype for Project Aura: a BLE hearing-device/IEM concept with nRF5340 compute, rechargeable LiPo power, digital microphones, flash storage, USB-C, and a multi-driver in-ear body. Current status: requirements captured; schematic capture is blocked pending audio/flex architecture correction.

WeMos D1 Mini: LiPo Battery, OLED Display, and Debounced Button System (Final Schematic & Ready for Production)

Premium wearable smartwatch PCB with nRF5340 BLE MCU, USB-C Li-Po charging, health sensors, haptics, and behavioral-feedback stimulation circuitry in a 40 mm four-layer form factor.

Battery-powered narrow ESP32-C6 sensor board with centered BNO086 IMU, RGB status LED, SMD vibration motor, and JST-PH LiPo input regulated to 3.3V.

25 mm circular BLE wearable pendant for ambient-light tracking using an ISP1807 module, AS7343 sensor, USB-C LiPo charging, and SWD programming pads.

Production-oriented 2-layer PCB for a desktop mini CRT-style collectible using an ESP32-C3 Mini module, USB-C LiPo charging, ST7789 TFT display, 3 Hall sensors, eject button, piezo buzzer, and battery monitoring.

Production-oriented 2-layer PCB for a desktop mini CRT-style collectible using an ESP32-C3 Mini module, USB-C LiPo charging, ST7789 TFT display, 3 Hall sensors, eject button, piezo buzzer, and battery monitoring.

Compact ESP32-C3 battery-powered pickleball telemetry tracker with high-g IMU, local flash buffering, USB-C LiPo charging, and Wi-Fi/BLE data transmission.

Earth source tile for a magnetic modular hex-tile system with LiPo power, MCU control, pogo-pin edge interconnects, and a robust low-speed tile communication bus.

Compact rechargeable BLE controller board with a 4x8 RGB LED display, USB-C LiPo charging, battery protection assumptions, and firmware-controlled LED current limiting.

Battery-powered ESP32-S3 LoRa ePaper sensor board with SHT41 environmental sensing, LiPo charging/fuel gauge, 5V input detection, and a 4.2 inch 300x400 b&w ePaper interface in an 85 x 60 mm low-profile PCB.

Portable ESP32-S3 AI voice assistant development board with USB-C programming, LiPo charging, OLED, I2S microphone/amplifier, SPI flash, and microSD expansion.