About: Ibrar Ayyub

This room temperature method, instead takes the easily grown graphene-on-copper and in a single-step (they claim) etch and transfer the graphene circuitry to nearly any substrate, including the flexible polymer substrates of the future. Their trick: cutting the circuit patterns into a simple shadow mask. “Desired micro-patterns are designed by a computer-aided design [CAD] software, […]

A bootloader enables download of hex-files directly into the flash-memory of a PIC or other microcontroller. The bootloader receives the user program via the PIC’s UART and writes it directly to the program memory (self programming). This feature greatly speeds up the development process, because the chip remains in the target circuit and need not […]

Finding a way to deposit vertical dielectric barriers has allowed Litecool of Sheffield to make dramatic cut in LED thermal resistance – from 1.25 to 0.5°C/W is one case – see diagram. Dielectric layers are essential to separate electrical conductors but, with a few notable exceptions like diamond, introduce thermal barriers. Spreading heat before it […]

Microcontroller BoardsRead the temperature in PIC16F/18F Primer Board from temperature sensor ds1820. The PIC16F/18F Primer board uses the ADC pin for reading temperature from temperature sensor ds1820. The reading output is displayed into PC through UART. PIC16F/18F Development Board The PIC16F/18F Development Board is specifically designed to help students to master the required skills in the area […]

Design   Summary: Our group designed  and  manufactured a  miniature  robotic  vehicle  that  conquers  various terrains.    The  vehicle  was designed  with  a  track system  which is  powered  by  two  DC motors. The  motors   use a  Quadruple half  H ‐Driver in  order to  drive the  motors  in  both  directions.   The track system  incorporates a  four  bar linkage  for each  tread.    These two  linkages  allow each  side to  be independently  raised  which gives the  robot multiple configurations.   […]

There’s now a simple solution for overcoming the incompatibilities between the USB3 I/O channels commonly used in today’s PCs and the digital media interfaces, such as High-Definition media Interface (HDMI) and Serial digital interface (SDI), favoured by audio/video equipment. Until now, differences in their frame formats and signaling mechanisms made it difficult for HD video […]

6 Digit serial display project has been designed around CAT4016 IC from ON semi.  The CAT4016 is a 16 channel constant current driver for LED billboard and other general display applications. LED channel currents are programmed together via an external RSET resistor. Low output voltage operation on the LED channels as low as 0.4 V […]

Experienced audio DIYers are familiar with monolithic linear regulators like the 78xx series and the LM317. Here’s a simplified block diagram of a standard linear regulator, from National Semiconductor’s Application Note 1148: Let’s see… We have an op-amp, a couple of transistors, a voltage reference, and a few resistors. Can we build a linear regulator […]

While I was writing some tips to solve problems about Spectrum’ keyboard, some guys asked me for the possibility of using a PC-keyboard coupled by adapter. One market solution was launched by ‘Sintech’, but isn’t available the scheme nor the program used by inner microcontroler. This lack of information pushed me to do an innovating […]

Introduction A few months ago I purchased a Philips PM6674 frequency counter on eBay. It’s an older 9 digit counter with two channels that has a maximum input frequency of 550MHz. The design feels dated compared to more modern counters, such as my Agilent 53131A. However, it is still a fully functional piece of lab […]