MEGA COLLECTION OF ELECTRONICS DIY PROJECTS
Every week, we publish 2 to 3 projects, sometimes even more! They range from simple circuits for beginners, to advanced projects that you can use to develop complete innovative products! Most projects have been developed by enthusiasts like you. Some by experts. And, some by our team. Many are tested at EFY Labs, and some are not–but they typically have a proof-of-concept video.
Part 2 of 3: Using AVR Microcontroller for Projects
In the first part of this article, we had described the main features of the AVR microcontroller and the hardware/software required for an AT-PROG...
Soldering Iron Tip preserver
Although 60/40 solders melt at about 200°C, the tip temperature of a soldering iron should be about 370°C. This is necessary to make a...
Standalone GPS Receiver with LCD Display
This AVR microcontroller-based global positioning system (GPS) receiver can be used to find the exact location of a place and know its standard time....
Put your own Smiley on GLCD
The regular 16×2 LCD can display characters of only certain dimensions. A graphical LCD (GLCD), on the other hand, can display custom graphics. GLCDs...
Remote Controlled Wireless Doorbell
This circuit lets you wirelessly control an appliance from a remote place by using a wireless doorbell. The appliance is triggered by the signal...
FM Bug
This FM bug transmitter circuit will let you spy on people. The transmitter can be placed in the desired room and the conversation heard...
Calling Bell Using an Intercom
Here is a simple calling bell circuit that can be used in small offices to call the office boy using an existing intercom system....
Simple Stereo Level Indicator
Usually, low-priced home stereo power amplifiers don’t have output level indicators. An output power level indicator can be added to each channel of these...
Rainbow Clock
Here is a simple circuit using different colour LEDs that makes your clock glow in different colours of rainbow. The clock’s dial (shown in...
Buffer and Driver for Square-Wave Signals
Most square-wave generators have a single output that doesn’t have a high driving capability/slew rate or is not adjustable in the required amplitude range....
Phone Bell Auto Silencer
Telephone ringing all of a sudden in the middle of a serious meeting is quite irritating. The automatic bell silencer circuit described here is...
Programmable Industrial On-Off Timer With RF Remote
In most of the modern manufacturing and processing industries, there is complete industrial automation through sophisticated hardware and software like programmable logic controller (PLC),...
Getting started with Raspberry Pi
SEPTEMBER 2012: The Raspberry Pi (Fig. 1) is powered by a BCM2835 system-on-chip from Broadcom that contains an ARM processor (running at 700 MHz)...
RGB LED Showcase Light
RGB LEDs are capable of generating a variety of colours by mixing red, green and blue colours. It is sometimes very interesting to replace...
Anti-Petrol Theft Alarm
Petrol/diesel theft of parked vehicles is quite common. Presented here is an audio-visual anti-petrol theft alarm circuit that can help prevent this crime. The...
Mixer and Preamplifier for String Instruments
Most of the small musical bands have up to four string instruments like guitars and violins. The signal from the transducers of these instruments...
Telephone Sentry
It is quite common to find extension phones in homes these days but this kind of convenience also comes with a distinct disadvantage: the...
Multifunction Ozone Generator
Ozone is a triatomic form of oxygen that is highly unstable and as such cannot be stored. It finds various applications in our daily...