About: Ibrar Ayyub

In the usual Kuzyatech fashion, when something breaks, we must take it apart. Today, one of the  ”early adopter” GU10 style LED lamps decided to fail mechanically: The power supply is wrapped in some tape. But that does not preclude a bunch of exposed mains line points from being visible All part numbers sanded off. […]

Mechanics of WiFi Detectors A wireless signal can travel only so far. Specifically, a typic­al signal can extend as far as 1,000 feet (304.8 meters) in an unobstructed, open area and about 300 feet (91.44 meters) in a closed area that has obstructions [source: Graves]. Because the signals themselves are invisible and the access points […]

I’m a programmer/systems architect by education and by the way of winning bread, but somehow I got infected with the electronics bug 3 years ago – had a sidejob to upgrade the firmware of a LED display, got into microcontrollers, then made myself comfortable in analog. Dave Jones has been saying in his videos – […]

How Telephone Amplifiers Work If you’ve set the volume on your phone as high as it’ll go and voices still sound faint, you may want to consider a device for hearing-impaired telephones called a phone amplifier. Several options are available, including units that attach to a phone line, portable amplifier units and dedicated amplifier telephones, […]

I bought an antique telegraph sounder a while back, and I’ve been working on a project that will click out emails from my Etsy store when I get an order. I’ve gone through several generations, and come up with something I really like. What follows is a description of my process for going from concept […]

RC Toy Transmitter RC toys typically have a small handheld device that includes some type of controls and the radio transmitter. The transmitter sends a signal over a frequency to the receiver in the toy. The transmitter has a power source, usually a 9-volt battery, that provides the power for the controls and transmission of […]

In today’s wireless, connected world, ambient Radio Frequency (RF) energy is everywhere. Technically, this free-flowing energy can be captured, converted and stored for use in other applications. In fact, it is already in use in a number of ultra-low-power, battery-free applications, such as RFID tags, contactless smart cards, and wireless sensor networks. As a result […]

Description Create a design and simulate using EE-Sim: [MAX15050][MAX15051] The MAX15050/MAX15051 high-efficiency switching regulators deliver up to 4A load current at output voltages from 0.6V to (0.9 x VIN). The devices operate from 2.9V to 5.5V, making them ideal for on-board point-of-load and postregulation applications. Total output-voltage accuracy is within ±1% over load, line, and […]

Cell-phone Virus Basics A cell-phone virus is basically the same thing as a computer virus — an unwanted executable file that “infects” a device and then copies itself to other devices. But whereas a computer virus or worm spreads through e-mail attachments and Internet downloads, a cell-phone virus or worm spreads via Internet downloads, MMS […]

Cheap low-speed dual channel PC/USB oscilloscope and arbitrary waveform generator with STM32F3 microcontroller. Miniscope v2d is based on STM32F303CBT6 microcontroller – LQFP48 device from STM32F3 family featuring: 32 kB RAM on data bus 8 kB RAM on instruction bus 128 kB FLASH memory USB device (full speed) 4 fast and flexible ADCs 12-bit DAC with […]