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J-Rat Techworks

Projects

  • Projects

Using an E-Paper Display with an ESP32-C3: Text, MQTT Data and a Simple Logo

E-paper displays are a great option for small projects where…

Read MoreUsing an E-Paper Display with an ESP32-C3: Text, MQTT Data and a Simple Logo
Beige Air Quality Sensor, sitting on bench, nice plant background
  • Projects

DIY Air Quality Sensor for Home Assistant Using an ESP32-C5

Indoor air quality is one of those things you usually…

Read MoreDIY Air Quality Sensor for Home Assistant Using an ESP32-C5
Wide 16:9 hero image, clean flat-lay on a light neutral desk. In the centre, a small electronics starter setup: ESP32 development board, multimeter, soldering iron, breadboard with jumper wires, resistors, LEDs, wire cutters, heat shrink tubing, and a small plastic project box. Minimal, uncluttered layout. Soft natural lighting, modern and beginner-friendly. No text in image.
  • Projects

Top 10 IoT Projects for Beginners (That You Can Actually Build)

If you’re new to IoT, it’s easy to get stuck…

Read MoreTop 10 IoT Projects for Beginners (That You Can Actually Build)
mmWave Sensor
  • Projects

How to Build a mmWave Radar for Home Assistant

If you’ve ever had your smart lights or plugs turn…

Read MoreHow to Build a mmWave Radar for Home Assistant
Water tank pressure sensor sitting on pavers
  • Projects

Solar-Powered Water Tank Monitor using Home Assistant

If you’re on tank water, the “how much is left?”…

Read MoreSolar-Powered Water Tank Monitor using Home Assistant
LED Light Bar in front of fireplace, light bar is lit up in the same colours as a flame
  • Projects

How to Build a Smart LED Light Bar With ESP32, WLED and Home Assistant

If you’ve been hunting for a tall, slim, smart LED…

Read MoreHow to Build a Smart LED Light Bar With ESP32, WLED and Home Assistant
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  • Ultra-detailed 3D render, 16:9 wide hero image. An ESP32 development board is in the centre of the frame on a desk, with soft glows connecting it to floating minimal icons of a light bulb, thermostat, door sensor and Wi-Fi symbol. Background is a subtle outline of a house floor plan. Clean modern style, soft shadows, blue-grey colour palette, beginner-friendly and not too cluttered, with space for text on one side.
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J-Rat Techworks is my little home lab on the internet.
I build and share DIY electronics, ESP32 projects and home-automation ideas, with full code and build logs so you can copy or remix them.

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