Thursday, October 28, 2021
Video Streaming Camera

Make Video Streaming Camera with Raspberry Pi

Live streaming video cameras can be used for security or personal purposes. A variety of webcams, camcorders, DSLRs and mirrorless cameras for streaming live video are available in the market. You...
multi-doorbell system

Build a Smart Touch-Controlled Multi-Doorbell System

Technology is advancing daily and everything is turning smarter. A number of traditional devices that we use in our homes are becoming smarter now, including doorbells that are evolving with new...
Circuit Breaker

Adjustable AC Circuit Breaker

This circuit breaker employs a single operational amplifier (op-amp) and yet has a wide range and is user-friendly. A circuit breaker is an electrical switch intended to protect an electrical circuit...

Wireless Water Level Indicator Without MCU

A wired water-level indicator uses many wires, whose resistance increases as their length increases. A wireless water level indicator using microcontroller (MCU) is costly and not very easy to program. Presented...
NodeMCU development board

Getting started with NodeMCU development board for IoT

Since Internet of Things (IoT) projects are now quite popular, I recently bought a NodeMCU board to try IoT application development. The NodeMCU development board is an open source board based...

Remote-Controlled Smartfan Using AT89C2051

The remote-controlled smartfans available in the market are very expensive and their operating principles are difficult to understand. Here is a simple circuit for a remote-controlled smartfan that can control the...

Industrial Digital Thermometer

Presented here is a 4-digit Industrial Digital thermometer based on ATmega16 microcontroller (MCU), which can measure temperature up to 1024°C. Normal thermometers have a limited range, and can easily get damaged at...
Overcurrent Fault Detector

Overcurrent Fault Detector

The overcurrent fault detector presented here is a general-purpose current-consumption sensor circuit that raises an alert when the flow of current through the system exceeds a certain limit. This simple circuit...

Simple Antenna Preamplifier for AM Radios

AM radios are still used for capturing transmissions from long distances (DX reception). But AM radios normally require long (10-30m) outdoor antennae. That is easy if you live in a village...

Control Up To 16 Appliances Without Using A Microcontroller

Generally, the total number of appliances that can be controlled without using a microcontroller (MCU) is limited to three or four. One possible solution to this limitation is described in this...
 
 
 

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