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Digital Lab

A home to software testing, electronics circuits & projects, tips and tricks and digital diary.

  • Home
  • Blog
  • Projects
  • How-To
  • Tutorials
  • Privacy Policy
  • About
Digital Lab

A home to software testing, electronics circuits & projects, tips and tricks and digital diary.

Electronic Dice Using NE555 and CD4017 – Beginner Electronics Project

In this project, we build an electronic dice circuit using two popular integrated circuits: the NE555 timer and the CD4017 decade counter. This project is part of the DigitalLab Beginner…

  • October 18, 2026
  • Electronics, How-To
Read MoreElectronic Dice Using NE555 and CD4017 – Beginner Electronics Project

DIY Continuity Tester Using a 2N2222 Transistor – Beginner Electronics Project EP3

A continuity tester is one of the most useful tools for anyone working with electronics. It helps check whether a wire, switch, connector, or PCB track provides an electrical path…

  • October 11, 2026
  • Electronics, How-To, Project
Read MoreDIY Continuity Tester Using a 2N2222 Transistor – Beginner Electronics Project EP3

Build a 3-Level Water Level Indicator with 2N2222 Transistors (No Arduino Needed)

Want to know when a tank is filling up without writing a line of code? In this beginner-friendly project, we build a water level indicator from a few transistors, LEDs,…

  • October 3, 2026
  • Electronics, How-To
Read MoreBuild a 3-Level Water Level Indicator with 2N2222 Transistors (No Arduino Needed)

ESP32 GPS Data Logger with TFT Display and SD Card: Map Your Route on Google Maps (EP2)

In EP1 we built the core of the logger with an ESP32, a NEO-7M GPS module and a microSD card. In this final episode we add a 2.8-inch ILI9341 TFT…

  • October 2, 2026
  • Electronics, ESP32, How-To, IOT
Read MoreESP32 GPS Data Logger with TFT Display and SD Card: Map Your Route on Google Maps (EP2)

How to Make a Simple Door Alarm Using a Reed Switch & 2N2222?

Project objective In this project, we build a simple magnetic door/window alarm using: The magnet activates the reed switch, which turns ON the transistor. The transistor then switches both the…

  • October 2, 2026
  • Electronics
Read MoreHow to Make a Simple Door Alarm Using a Reed Switch & 2N2222?

ESP32 GPS Data Logger EP1: Get GPS Data and Save It to SD Card

In this project, we are building an ESP32-based GPS Data Logger using the NEO-7M GPS module and a microSD card. The goal is to capture GPS information such as latitude,…

  • October 2, 2026
  • Electronics, ESP32, How-To
Read MoreESP32 GPS Data Logger EP1: Get GPS Data and Save It to SD Card

ESP32 WiFi Scanner EP6: Add Battery Voltage and Percentage Monitoring

In Episode 6 of the ESP32 Portable WiFi Scanner project, we take the project one step further by adding battery monitoring. The scanner is designed to run as a portable…

  • September 4, 2026
  • Electronics, ESP32, How-To
Read MoreESP32 WiFi Scanner EP6: Add Battery Voltage and Percentage Monitoring

ESP32 WiFi Scanner EP5: Adding Touchscreen Navigation and Integrating WiFi & BLE

In the previous episode, we expanded our ESP32 WiFi Scanner by adding BLE scanning and battery/power support. In this episode, we take the project one step further by introducing a…

  • August 27, 2026
  • Electronics, ESP32, Project
Read MoreESP32 WiFi Scanner EP5: Adding Touchscreen Navigation and Integrating WiFi & BLE

ESP32 Wi-Fi Scanner Project EP4 – Add BLE Scanner and Battery Support

In the previous episodes of the ESP32 Portable Wi-Fi Scanner project, we built the project step by step. In Episode 1, we created a basic Wi-Fi scanner that displayed nearby…

  • August 17, 2026
  • Electronics, ESP32, How-To, IOT, Project
Read MoreESP32 Wi-Fi Scanner Project EP4 – Add BLE Scanner and Battery Support
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Latest Posts

  • Electronic Dice Using NE555 and CD4017 – Beginner Electronics Project
  • DIY Continuity Tester Using a 2N2222 Transistor – Beginner Electronics Project EP3
  • Build a 3-Level Water Level Indicator with 2N2222 Transistors (No Arduino Needed)
  • ESP32 GPS Data Logger with TFT Display and SD Card: Map Your Route on Google Maps (EP2)
  • How to Make a Simple Door Alarm Using a Reed Switch & 2N2222?

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