Arduino-Based Compact TDS Meter

Total Dissolved Solids (TDS) is a measurement for detecting the potability of water. Both humans and aquatic creatures require a suitable level of water content to survive. TDS value > 1000...

Tricolour LED Nameplate With Arduino

Nameplates are generally made of wood, acrylic sheet, or a metal and fixed on a wall or kept on desk. The author’s prototype of an acrylic nameplate that can display the...
Android Application For Multi-Sensor Data Monitoring

Android Application For Multi-Sensor Data Monitoring

This Android-based project can monitor on-site (field) process data sensed by two temperature sensors and display the temperature (in degree centigrade) on a smartphone. The authors’ prototype of the project is...

Little LiFePO4 Battery Charger

This circuit of single-cell LiFePO4 (lithium iron phosphate) battery charger is based on an LM358 operational amplifier (op-amp) and a couple of inexpensive and easy-to-get components. It can be powered from...

Stereo AF Amplifier Using TDA1517

Here is a simple stereo audio amplifier that can be made using a TDA1517 IC. A 14.4V regulated voltage is used as power supply for this amplifier. TDA1517 is a 9-pin...
Power Bank Based Linear Regulated DC Power Supply

Power Bank Based Linear Regulated DC Power Supply

This circuit uses power bank and DC-DC booster module not only for charging mobile devices but also to provide 1.2V to 37V DC power supply. The compact circuit can even be...
Rotating-Wheel LED Lights

Rotating-Wheel LED Lights For Decoration At Functions

This circuit produces a rotating-wheel like LED lights pattern, which can be used to decorate public halls during parties, festivals, and marriage functions. The concept is based on the persistence of...
stereo audio amplifier

Simple 5W Stereo Amplifier For Noise-Free Music

This simple stereo audio amplifier is based on a 12-pin TA8207K IC, which is inexpensive and easily available. In addition, it requires only a few resistors and electrolytic and ceramic capacitors....

5V DC To 48V DC Converter For Phantom Power Supplies

This circuit presents a simple and low-cost DC-to-DC converter for phantom power supplies used in mixing consoles, microphone preamplifiers, telephone systems and similar equipment. There are many application circuits that require...
NeoPixel LED lighting using Arduino

NeoPixel Colour-Changing LED Lighting Using Arduino

This NeoPixel LED lighting based on WS2811 driver and Arduino digitally produces red, green, and blue (RGB) lights and the combinations. Originally introduced by Adafruit, the LED strips come with driver...
 
 
 

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