About: Ibrar Ayyub

Hey guys, I built another board, which is a 3-channel (RGB) LED driver based on an inexpensive chipset called PT4115 (you can find them on eBay or Aliexpress). The circuit is very simple and looks like Sparkfun’s PicoBuck. However, I used beefier components and a different chip. You may say it’s pretty much the same […]

TL;DR – I wanted all of my AV components to turn on and change inputs as soon as I started Airplaying music to my Apple TV from my iPhone, so I popped open the Apple TV, wired up a photocell sensor to an Arduino Uno, wired up some Infrared LEDs, wrote some code, and made […]

Introduction Recent innovations in the technological world have led to the introduction of some of the most sophisticated products. These products have led to the emergence of a new lifestyle and have changed completely the market demands for electrical products. Here at newfrog, we offer you some of the best and latest electrical products for […]

In this post I’d like to describe you a project I’m working on that consists of connecting an Android development board to one (or more) Arduino slave(s) using modbus protocol and rs485. Even though the idea of this project could be applied in many fields, I chose to contextualize it in a typical smart home […]

Introduction I’ve for some time now wanted to do more RF design. Although I have taken some RF design courses, I haven’t actually made a single RF design before. But you can’t learn without doing and inspired by the MIT coffee can radar designed by Gregory Charvat, I figured that building a radar should be […]

Dimmer With  MOSFET This circuit shows that dimmers intended for use at mains voltage do not always have to contain a triac. Here, a MOSFET (BUZ41A, 500 V/4.5A) in a diode bridge is used to control the voltage across an incandescent bulb with pulse-width modulation (PWM). The power supply voltage for driving the gate is […]

This is a simple guide on how to make a Ultrasonic sensor arduino mega with code, an HC-SRO4 Ultrasonic Sensor, a Buzzer, and some leds.  The ultimate goal of this tutorial is to use the buzzer and LEDs to display how far the object is from the ultrasonic sensor. Step 1: Materials Needed The Materials […]

PremoBoard can be controlled by any system via the USB port: it is an expansion board designed for (but not limited to) cubieboard (A10 or A20). PremoBoard is a expansion board featuring the following: – 4 USB 2.0 – 2 LAN 10/100 – 2 WIFI (OPTIONAL) For more detail: PremoBoard  

Arduino temperature display I’ve had an Arduino-based weather station since June 2009, but one problem with it has been that there hasn’t been any easy way to display the data in real time without going to the database (or the raw import files) to see what the latest observations were. I wrote a quick web […]

down vote favorite I have a minor issue with my ECG. When I poke at the leads, I get a reading. But when I hold the leads or place it near my heart, I don’t get anything. I’m pretty sure this is hardware related, but I don’t want to completely rule out a potential software […]