RF433MHz

433 MHz frequency. 433MHz is a commonly used frequency band for all types of equipment that require little power, such as garage door openers, headphones, baby phones and remote controls. Also many inexpensive transmitters and receivers for switching devices and light dimmers operate on the 433MHz band.

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COVID-Free Contactless Cordless Bell Using

“Year 2020, has taught us many new things. Our lifestyle has changed and we have adopted to many new and safe ways of livelihood. From social distancing to working from home, our main aim these days is to stay safe …

Let’s turn lights on with the computer the 433Mhz way

“A while ago I started using home assistant on a pi and bought some inexpensive 433Mhz ac wireless switches. However, after one month of intense use the Raspberry Pi didn’t have enough power, so I bought a cheap computer …

DIY Walkie-Talkie With Generic 433MHz RF Modules

“In this project I will show you how to use generic 433MHz RF modules from Ebay in order to create a functional Walkie-Talkie. That means we will compare different RF Modules, learn a bit about a class d amplifier and …

Autopilot for Sailing Boats (Automatic Steering System)

“Let’s take a break during navigation while Autopilot follows the route, control it with remote control! Story Preface: I love sailing alone because when a man is on the sea with his sailing boat he got everything he needs …

Arduino Wireless Alarm System Using Existing Sensors

“This project can be built in about half an hour at a cost of about $20.00 if you have existing 433Mhz or 315Mhz wireless alarm sensors. It can also be a complete new project with wireless alarm sensors, such …

ATtiny85 RF Remote Control

“As I mentioned in a previous Instructable I recently started playing with some ATtiny85 chips. The initial project I had in mind was to make an RF remote control that could operate on a coin battery. I needed to go …

Low Cost Wireless Sensor Network on 433MHz Band

“What are wireless sensor networks? A simple definition would be: the wireless sensor networks refers to a group of electronic devices distributed on a certain area for monitoring and recording environmental data, that are wirelessly transmitted to a central location …

Ultra Simple, Ultra Small and Ultra Cheap Pet Monitor

“I do not know how many of us have met the following situation: we go for a walk with our pet companion, we let him go free and suddenly we do not see him again. Or we play in the …

Automatic Gate Slider Under $100

“Over the summer, my dad motivated me to look into buying a gate automation system and setting it up. So I started my research and looked into package solutions on AliExpress and local vendors. The local vendors were offering complete …

New Wireless IOT Sensor Layer for Home Environmental Monitoring System

“This Instructable describes a lower-cost, battery-powered wireless IOT sensor layer for my earlier Instructable: LoRa IOT Home Environmental Monitoring System. If you haven’t already viewed this earlier Instructable, I recommend reading the introduction for an overview of the capabilities …