About: Ibrar Ayyub

I love AVR ATtinyx5 series microcontrollers. They are cheap, easy to use, they can be programmed just like Arduinos and comparing to their size they offer great features. For example, they can be used as remote analog to digital converters connected to master device using I2C bus. Background: few year ago I’ve build a weather […]

Description HC-12 are cheap 433MHz wireless serial port communication modules with a range up to 1800m in open space. Each costs about $5 when bought from China, and 2 of them can create wireless UART link that can be used, for example, to transfer telemetry data from UAV. Or drive IoT device. Or connect sensors. […]

VoCore is a small Linux computer with Wifi that can work as a full functional router. It runs OpenWrt on top of Linux. It contains 32MB SDRAM, 8MB SPI Flash and uses RT5350 (360 MHz MIPS) as its heart. It provides many interfaces such as 10/100M Ethernet, USB, UART, I2C, I2S, PCM, JTAG and over […]

My most rewarding projects are the ones which i actually use. I like my audio gear so, this was the perfect companion project! On my desk i have a headphone amplifier for my AKG K702’s headphones, below it i have my self built Onixia integrated amplifier for my bookshelf speakers. I have been thinking about making a […]

This post is about how to use the BMP180 barometric sensor with the Arduino. It is also applicable for other similar barometric sensors. Introducing the BMP180 barometric sensor The BMP180 barometric sensor (model GY-68) is the one in  the following figure (front and back view). It is a very small module with 1mm x 1.1mm (0.039in x […]

MikroElektronika, the microcontroller development boards and accessory boards manufacturer, introduced a new development board for beginners and non-experts called Flip & Click. Flip & Click is a rapid prototyping tool that is an Arduino Due on one side, and four mikroBUS™ sockets on the other side. The first side, the blue side, is Arduino Due […]

Researchers at The University of Texas at Dallas are sweating the small stuff in their efforts to develop a wearable device that can monitor an individual’s glucose level via perspiration on the skin. In a study recently published online in the journal Sensors and Actuators B: Chemical, Dr. Shalini Prasad, professor of bioengineering in the […]

Having explained the theory, let’s see in practice the project of the SEPIC power supply.   In this post we discussed – on a theoretical level (even if in a simplified way) – the SEPIC switching converters, also highlighting advantages and disadvantages, and giving you the basics for the calculation of their components. Let’s get […]

Radioactive particles are found abundantly in nature. Whether they come from space or generated on Earth (radioactive waste, medical X-rays, etc), they are high-energy particles resulting from radioactive decays. The three major types of radioactive particles are named after the first three letters of the Greek alphabet: α (alpha are helium nuclei), β (beta are […]

From time to time, I see people trying to build an audio VU meter. In the analog era, that’s typically done with a voltage divider + a series of comparators; or using chips like LM3914/3915. Those chips are harder and harder to find, or you may need more resolution, or a different output profile. What […]