PING Ultrasonic Distance Sensor and Applications
PING ultrasonic distance sensor is a sensor 40 kHz Parallax production is widely used for applications / robot contest. Advantages of this sensor is that only requires 1 signal (SIG), in addition to the 5V and ground lines.

Learn to Make USBasp is Easy
USB Downloader was made by Thomas Fischl. He used the the USB driver with AVR that is being developed by Objective Development GmbH. USBasp consists of ATmega48 / 8 and a few passive components without requiring the other driver components. USBasp has several features such as: Can work on the Linux operating system, Mac OS X and Windows..

Symmetric Power Supply +35V and -35V Project
A symmetric power supply is needed when we make project about amplifier. Like an amplifier in sound system, it needs a symmetric power supply to operated. Here, we will construct a simple power supply circuit which result the output voltage is +35V and -35V.

Minimum System of ATMEGA8
ATmega8 is a low power 8-bit microcontroller with RISC architecture. This microcontroller can execute a command dalah one period a clock for each instruction. Some features of the ATmega8 are as follows: 8 Kbyte Flash Program, 512 Kbyte EEPROM, 1 Kbyte SRAM, 2 8-bit timers and one 16 bit timer, Analog to digital converter, USART, analog comparator, Two wire interface (I2C)

Introduction Parallel and Serial (USB) Downloader
To flash the program into the AVR uC requires an equipment downloader. There are two types downloader is a parallel and serial downloader. Parallel downloader requires a computer that has a parallel port as DB25. Serial downloader can be used on any computer that has a serial port like a usb port. Because now it no longer produced a computer that has a parallel port then we should make a serial downloader (usb downloader),..
