About: Ibrar Ayyub

Summary This document provides guidelines for mounting heat sink s for the proper thermal management of power semiconductor devices in field applications. This document describes heat – sink mounting methods , considerations, contact thermal resistance, and mounting torque for various pack ages. A milled or machined surface is satisfactory if prepared with tools in good […]

If you have old USB headphones you can easily transform them to a USB sound. This card can be helpful during testing of home built devices connected to the speaker or microphone ports on the PC (for example A proof of concept of a simple sonar and Constructing a homemade microphone). I used broken Audio […]

In this project, we will be making a mini weather station that measures temperature and humidity and transmits them wirelessly to a ground station, which displays the readings on an LCD display! It’s a fairly easy project and can be used either on its own or part of something bigger. Step 1: List of materials […]

This cranial electrotherapy stimulator is a medical treatment that makes use of electrical energy to treat anxiety, depression and insomnia. It is a therapeutic tool to help heal the body, which primarily uses an electrical current to stimulate nerves and muscles through the skin. This device uses a few components such as 555 timer, decade […]

Part’s List: 2x 47K 1x 10K 1x 82K 1x 50K POT 1x 33uF 1x 10uF 3x 100nF (104) 1x 100pF (101) 1x 10pF (10) 1x NJM2035 IC 1x 38 KHz Crystal   Technical Specifications: Voltage Supply: 1.2V – 3.6V MAX Current Draw: >3mA Channel Separation: < 25dB Signal to Noise Ratio: 67 dB Operation Temperature: -20 […]

This is a simple countdown-timer-on-a-chip project – you program the PIC, attach some buttons and a pair of 2-segment LEDs, and you are done. I used this timer for one of my projects, but I tried to make that timer as generic as possible, so it can have other applications. On this site I describe […]

PIC Microcontroller Development Tools History PIC microcontroller Development Board (Completed on 2006-10-28) The ultimate PIC Microcontroller development board. After years of programming PIC microcontroller, I have finally design my super development board to program PIC microcontroller firmware. The automatic programming mode select and the 40 bits LED light bar display have ease my programming process […]

Hi, I’m Daniel, a professional software developer. This is my very first instructable, and I’m über-excited. I hope you’ll like. 🙂 With this instructable, I try to solve a problem everyone has: Passwords. Accounts. Logins. All the stuff you need to get into your favourite social media site, shopping site, blog or forum (they still […]

A bubble or spirit level meter, like the DIY Digital Spirit, is a handy tool to find whether a surface is horizontal or vertical. It is often carried by civil engineers, mechanical engineers, surveyors, carpenters, and many other professionals whose work involves precise alignments of horizontal and vertical planes.. Original spirit levels had two banana-shaped […]

1. The player allows: playback wav files in stereo format, 22,500Hz freqfency, and 8 bits of resolution, display the song titles, display time of songs, the possibility of stopping (pause) and switch songs, the possibility of change volume (+, -), read data from the MMC memory card inserted in the slot, display current state on […]