DIY Electronics Lab

Quick Recap

• A tutorial explained how to build a weather monitoring system using an ESP32-S3 smart display with BME280, rain, and LDR sensors plus...

Take ultrasonic sensors past simple ranging into automation and IoT with these builds.

• Touchless Smart Dustbin: Wave your hand for automatic,...

• Install ESP32 board definitions and PubSubClient library via Arduino IDE
• Connect ESP32 to Wi-Fi with WiFi.h, ssid/password, and status loop
  -...

• Compact design uses the VIEWE 2.8-inch ESP32-S3 Smart Display as both controller and touchscreen, eliminating separate MCU hardware
• Measures...

• Use Arduino Uno as ISP to program Pro Mini without FTDI adapter
• Needs only Uno, Pro Mini, jumper wires, USB cable and IDE
• Covers wiring, IDE setup, upload steps and error fixes
• Perfect beginner workaround for common hobbyist hardware

This analog circuit uses an LM324 op-amp to monitor battery voltage and automatically cuts charging via 12P10 MOSFET and 2SC2383 transistor once the preset threshold is hit. A practical DIY solution for overcharge protection in 48V systems.

• Master ESP32 Bluetooth communication and wireless robot control step-by-step
• Program L298N motor driver for forward, backward, left, right and...

Quick Recap

• A detailed guide covered building a digital spirit level with ESP32-S3, GC9A01 display, and MPU6050, including wiring, libraries, and...

• Build a simple IR motion sensor alarm using only a 555 timer IC—no Arduino or coding required
• Triggers buzzer and LED instantly on beam...

• Hardest step: Designing a custom front steering mechanism to fit the tiny chassis
• Core hardware: ESP32 Super Mini C3 paired with DRV8833 dual...

Build a custom wireless pump controller from scratch using basic components.

• 433MHz RF modules enable remote ON/OFF control for pumps
• Covers...

This full tutorial walks through building a servo-based robotic arm with Arduino for pick-and-place tasks, delivering a practical starter project in robotics and automation.

Build a practical desktop gadget displaying real-time clock, temperature, and humidity.

• Core components: Arduino Uno/Nano, SSD1306 OLED, DS1302...

Build a practical digital spirit level with ESP32-S3, round GC9A01 display, and MPU6050 for real-time leveling.

• Features smooth animated bubble with...

Quick Recap

• A tutorial covered building a digital brightness controller with Arduino, rotary encoder, and OLED display for PWM LED control.
• A...

Build a fully see-through 15x10 LED matrix with 150 WS2812B LEDs on flexible PCB.

• Skip ground planes and copper pours during routing for maximum...

Makers keep delivering practical battery builds that solve real needs.

• Cell logger: ESP32-S3 plus ADS1115 measures and logs 21700 voltages for...

• Real-time clock with DS1302 and I2C LCD covers wiring, library setup, and time tracking for practical timing projects
• Rotary encoder brightness...

Build a UART receiver shift register in VHDL using a cascade of flip-flops to sample serial data on Din with baud-timed shift-enable pulses, turning the stream into parallel output for FPGA designs.

Portable Power Builds

• Solar Watch Charger: Build a solar watch charger for Rs 200 as shown in the 3:28 video tutorial.
• 12V Rechargeable Pack:...