All posts in the 'Computer projects' Category
Posted on 10 Mar 2008
This is a standalone temperature and fan monitoring and control unit for the PC. It uses the temperature readings to adjust fan speeds in order to regulate temperature and noise. The system is flexible in that it can be configured to be either completely autonomous, or set up to be configurable. It is also highly configurable in the setting up of the features and parameters. The entire unit is controlled by the 2 Atmel Mega32 MCUs - 1 for the main control unit and 1 for the RF remote control, with inputs to the ADC (for thermal sensors), port pins, RS232 serial connection and output to the LCD, port pins and RS232 serial connection. The RF remote control controls specific settings of the unit. The main unit is powered off a standard 4-pin PC Molex power connector while the remote control is powered off a 9V battery.[more]
Posted on 05 Mar 2008
Nintendo 64 and Gamecube controllers are excellent controllers which are quite appropriate for many PC games. The microcontroller firmware in this projet implements a standard HID joystick. This means that no special device driver is required. It works perfectly well under Linux and Windows with the operating system’s drivers.[more]
Posted on 05 Mar 2008
This is a physical hit counter.It is used to count page-hits on the website instead of using software only.The counter will connected to rs232 port through a few of electronic components that preform as a counter driver and power supply circuit.[more]
Posted on 13 Feb 2008
Today and future the serial and parallel ports being phased out on new computers, hardware designers and hobbyists have no choice but to convert the USB port back to RS232 serial. FTDI have a very nice chip that does just that, the FT232AM. This chip converts USB to a standard high-speed serial port. The bonus with FTDI is the drivers are already written for you. All you have to do is design the hardware and download the serial USB drivers from FTDI’s web site. The schematic is quite simple, however the FT232AM requires a lot of external components to get it working. FTDI now have a FT232BM 2nd generation device. This device requires less external parts.[more]
Posted on 13 Feb 2008
This can measure temperature from up at 8 DS1820 digital temperature sensors all on the same 1-wire bus. That’s right only 3 wires are needed to go to all the temperature sensors, GND, VCC and 1-wire data. All sensors will connect to the same cable.Measure temperatures in multiple locations , no calibration required ,range -55 to +125Deg C,,log up to 8 temperatures to a PC using RS232.This project use AVR AT90S2312.[more]
