301 Moved Permanently

Posted February 23, 2015 by Chris

"I needed small ultrasonic sensors for a flying sensor. So I got the smallest one – SRF01. Quite nice unit, works down to 0 cm. There were some problems with it – Maximum detection frequency is only ~14 Hz and the resolution isn’t so great (1 cm). Also, on some occasions after falling from a high height the transducers broke and sensor would only give out constant distance reading. To fix the broken sensors (which I had many) and to satisfy my curiosity I took one apart and reverse engineered it."

Posted February 22, 2015 by Chris

"The goal of this project was to create a robot which could erase written text on a whiteboard completely autonomously, i.e. no human interface. The processes involved in this project included devising a method for the robot to search a whiteboard for text, designing a way to physically move a robot to the text, and enabling a robot to erase the text."

Posted February 20, 2015 by Chris

"I bought a set of these chips long ago and they were gathering dust in one of my electronic part cabinet drawers, until a friend of mine got a gainclone kit for himself. Not feeling to be left behind, I decided to put my hands into the dirt, literally: I had a bunch of non-working 20 year old transistor based amplifiers that I got at a yard sale, along with a nice pair of Technics SB-LX7 8ohm 3-way 200W speakers."

Posted February 19, 2015 by Chris

"By employing RFID, secure entry systems can be developed without incurring huge costs. These are the reasons of excessive use of RFID technology. In this article, interfacing of an RFID reader module has been explained with PIC18F4550. The USART interrupt, an internal PIC interrupt, has also been explained."

Posted February 18, 2015 by Chris

"Conventionally, wireless controlled robots user circuits, which have a drawback of limited working range, limited frequency range and limited control. Use of mobile phones for robotic control can overcome these limitations. It provides the advantages of robust control, working range as large as the coverage area of the service provider, no interference with other controllers and up to twelve controls."

Posted February 16, 2015 by Chris

"The 24FC1025 is a serial I2C EEPROM memory fabricated by microchip, it has 1024Kbits (128KB) of memory space and it is divided in two parts each one of 512Kbits (64KB); the first part goes from address 0x0000 to 0xFFFF and the second part goes from 0x10000 to 0x1FFFF."

Posted February 15, 2015 by Chris

"As you probably know, V-USB is a very useful software-only implementation of low-speed USB device for AVR microcontrollers. It adds USB functionality for almost any AVR, particularly for those without hardware USB functionality. With this, it’s possible to make a very low-cost standalone Arduino with USB port and without having to use an FTDI chip."

Posted February 13, 2015 by Chris

"Xbees are some of the most powerful wireless modules you can find and they’re also very easy to configure and use…If you’re like me and only bought the modules without the breakout boards or forgot to buy it, then you have to make the modules breadboard friendly to use it. I’ve made a PCB which converts the 2.0mm spacing of the pins of xbee to the normal DIP spacing of 2.54mm."

Posted February 12, 2015 by Chris

"After purchasing the latest version, I tried putting one of the Lego motors we have around the house through its paces. Using one of the older models (4.5v Lego motor #6216m) and learning from the examples in the Python Gertboard Suite made crafting my own setup surprisingly easy."

Posted February 10, 2015 by Chris

"The LEDs are controlled by one ATmega328 with 15 8bit shift registors (74HC595) sitting on two PCBs in the center of the globe. The power is supplied via slip rings. The two PCBs and the mechanical part are again self-made."