8-channel AC current data logger

Posted on by Leave a comment

This Arduino-powered 8-channel data logger built by smooth_jamie can measure AC currents drawn by home appliances or other equipments, and record the data on an SD card with timestamp for future use. The project uses the HMCT103C 5A/5MA current transformer for sensing the current flowing through a conducting wire. The current transformer output signal is very low, and therefore, an OpAmp-based circuit is built for instrumentation. The analog output voltages corresponding to the eight-channel current logger are digitized using an external lADS1115 16-bit A/D converter IC. Hi Everyone, welcome to my first instructable! By day I am a test engineer for a company that supplies industrial heating equipment,

Read more

Product review: Elecrow’s 7″ HDMI LCD Display for Raspberry Pi

Posted on by Leave a comment

A colorful LCD display is always a great add-on to any Raspberry Pi project. This article provides a quick review of a high resolution (1024×600 pixels) 7″ HDMI LCD product from Elecrow and illustrates a simple way to set it up for Raspberry Pi. With HDMI support, built-in capacitive touchscreen control, and 4 mountable corners, this LCD is a perfect Plug-n-Play display for use with single board computers like Raspberry Pi and Banana Pi. It comes with an HDMI cable for the display, an USB cable for touchscreen control, four mounting screws, and a DVD containing the driver softwares. Hardware connections and software setup The setup

Read more

Serial seven segment LED display shield

Posted on by 2 comments

Seven segment LED displays are brighter, more attractive, and provide a far viewing distance as well as a wider viewing angle compared to LCD displays. This project describes a serial seven segment LED display shield for Arduino Uno or compatible boards. The shield consists of eight 0.56″ seven segment displays that are driven by one MAX7219 chip. The shield also features a light dependent resistor (LDR) to implement adaptive brightness control to the LED displays. The LDR output can be fed to A0 or A1 analog input channel of Arduino to read the surrounding illumination level. Arduino can then use that

Read more

Minimalist ATtiny85 wrist watch

Posted on by One comment

David Johnson-Davies’ minimalist ATtiny85 wrist watch displays time using 12 LEDs that are arranged in a circle like a watch dial. A push button, installed on the top side of the PCB, needs to be pressed to see time. The watch shows the hour by lighting up an LED and minute by flashing another LED. The minute resolution is 5 min. To show the time you press the button on the watch face, and the time is then displayed for four seconds. It lights one LED to show the hour, and flashes another LED to show the minutes to the nearest

Read more

End of Year Sale at Microchip Store

Posted on by Leave a comment

It’s time for the end-of-year sale at Microchip store. This year’s discount coupon code is EOY2016DT, which could save you some money on your favorite development board. Using this code can get you $65 off on Digilent Analog Discovery Multi-Function Instrument, $8 off on Curiosity HPC Development Board, and more. Check out the main sale page.

Read more
« Older Entries Recent Entries »