The AAduino is an wireless Arduino clone the size of an AA battery with Keystone battery terminals rotated 180° to act as positive and negative terminals. It is meant to go inside a 3xAA battery holder creating a very small wireless node. Powered by an ATMega328p, it is fitted with an RFM69CW companion, two DS18B20 temperature sensors and an indicator LED

3.3 V-powered pH and ORP probe interface using an ADS1115 module, MCP6002 through-hole buffers, and DS18B20 temperature sensing. External ESP32 connection is through one 5-pin header carrying 3V3, GND, SDA, SCL, and DQ; ADS1115 ADDR is fixed locally and ALERT is unused.

Temperature Sensor Digital, Local -55°C ~ 125°C 9 b, 10 b, 11 b, 12 b TO-92 #commonpartslibrary #integratedcircuit #temperature #sensor #digital

Temperature Sensor Digital, Local -55°C ~ 125°C 9 b, 10 b, 11 b, 12 b TO-92 #commonpartslibrary #integratedcircuit #temperature #sensor #digital

Low-voltage ESP32-S3-DevKitC-1 carrier and control board for ATLAS X, with OLED, buttons, DS18B20 input, indicators, expansion, and no fan circuitry in Revision A.

Battery-powered ESP32 prototype for measuring soil/road-surface condition using HX711 load cell, MPU6050 vibration/tilt sensing, and DS18B20 temperature sensing from 18650 battery power.

Screw-terminal wiring and power-distribution PCB for an Arduino Mega, four BTS7960 DC motor drivers, a TB6600 stepper driver, relay-controlled pumps, MG996R servos, HC-SR04 sensors, DS18B20 probes, and potentiometers. Accepts 24V and interfaces to external high-current buck converters.

ESP32-C3 battery-powered pH and ORP probe interface using ADS1115 differential ADC, MCP6002 through-hole buffers, DS18B20 temperature compensation, and short net labels for firmware handoff.

100 mm x 140 mm ESP32-based 18650 battery state-of-health analyzer prototyping board with active MOSFET discharge switching, current/voltage measurement, OLED UI, DS18B20 temperature input, and fan control.

ESP32-based automatic Normal Saline Solution warmer with dual DS18B20 temperature sensing, ILI9341 TFT display, relay-controlled 12V heater output, buzzer/LED alerts, push button input, and segregated high-current PCB layout for thesis prototyping.

150 mm x 15 mm 2-layer soil moisture probe using an external 3.3 V supply, FDC1004 capacitance sensor, DS18B20 temperature sensor, top-half component placement, and a bottom-half exposed interdigitated sensing electrode region on both copper layers with 1 mm trace/space for JLCPCB 0.8 mm fabrication.

Termostato da incasso con NodeMCU ESP8266, sensore DS18B20, alimentazione isolata 230 Vac, uscita relè SPDT a contatto pulito per caldaia e controllo via pagina web Wi-Fi.

Compact 24 V Cat5-powered RS485 node with STM32, 3 bistable relays, 3 DI, DS18B20