About: Ibrar Ayyub

Galvanic from PC isolated PIC programmer The Wisp648 from www.voti.nl is an In Circuit Serial Programmer to program a flash PIC which mostly can stay in your circuit. No irritating doings like pulling the PIC out of the PCB, place it in the programmer, programming it, pull it out the programmer and place it back […]

Here are the technical specifications: LCD resolution: 128 x 64 pixels LCD manufacturer: DisplayTech. LCD model 1: 64128COG-FA-BC (no backlight) LCD model 2: 64128G-FC-BW-3 (white LED backlight) On-glass lcd controller KS0713, with 30 pins connector. Very low power operation (less than 1mA @3V) Fast serial interface (only 8 wires needed) Molex miniature connector. LCD: dimensions: […]

The purpose of this chapter is to provide basic information that one needs to know in order to be able to use microcontrollers successfully in practice. This chapter, therefore, doesn’t contain any super interesting program or device schematic with amazing solutions. Instead, the following examples are better proof that program writing is neither a privilege […]

Many AA or AAA battery chargers charge batteries in pairs, but plenty of devices use 1 or 3 batteries, meaning that some of your batteries get overcharged and some get undercharged. NiCd and NiMH batteries also benefit from an occasional full discharge, which most normal battery chargers won’t do. If you’re anything like me you’ll […]

UK plant researchers are looking into LED lighting to grow plants with less energy. While outdoors in the summer there is no real need to provide plants with artificial lighting, it is increasingly used to extend the growing day and growing season inside greenhouses. It is not necessarily the efficacy of LEDs that is the […]

RS232 Connection Notes See the RS232 reference to determine the wiring for either a 9-way or 25-way female D Type “sub-miniature” connector. RTS and CTS are connected together. RXD is used to steal a negative supply. You may have to connect DSR and DCD to DTR if you are using the Arbiter hardware with other software. […]

Introduction: This describes my original design dual channel quantizer inspired by Chris List’s ARP Style CV Quantizer design. My new implementation is an intelligent design that exploits the programmability of a Microchip PIC16F84. It will quantize voltages in 1/12 volt (semitone) or 1 volt (octave) steps from –10V to 10V. Quantization time is about 2ms […]

People who are visually impaired usually use a staff to guide them as they walk. They tap with their staff to know if an obstacle is present around. Others use the echolocation technique. They produce a clicking sound through their tongue, foot, and fingers and through this they detect objects from their surrounding by sensing […]

The Button Code is a system that allows a single button to act as a keypad. The user enters a 4 digit code into the system using button taps. The button can be placed where the public can access it since like a keypad there are many combinations to keep guessers from activation the system. […]

Voltmeter Ammeter is a great kit to measure voltage and current at the same time. It measures 0-70V or 0-500V voltage with 100mV resolution and current from 0 to 10A. It’s a perfect addition to any power supply, battery chargers and other electronic projects where voltage and current must be monitored. Kit uses PIC16F876A microcontroller […]