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Solar Panel Controller
Posted on Wednesday, April 21, 2010   •   Category: Battery Chargers

Solar Panel Controller

The purpose of this project is to realize a Solar panel controller. Initially developed for a sailing boat, the target to reach was to control the level of charge and discharge and to protect a 12 volts lead battery connected to a 32 watts solar panel.




PIC PIN / PORT Extender
Posted on Wednesday, April 21, 2010   •   Category: PIC

PIC PIN / PORT Extender

This circuit based around 74LS154 will extend PIC / AVR microcontroller output PINs from 4 to up to 16. It can also be used for extending parallel port output pins.




LCD Terminal
Posted on Wednesday, April 21, 2010   •   Category: PIC

LCD Terminal

The LCD Terminal just like a normal terminal, it can connect to any host via RS-232 serial cable. A PC keyboard must connect to it as the input device and what ever you type will send to host via RS-232 and display on a 40x4 LCD. Data receive from host can also display on the LCD unit. You can use this device as any Unix/Linux machine's console.




PIC16F877 APRS Weather Station
Posted on Wednesday, April 21, 2010   •   Category: PIC

PIC16F877 APRS Weather Station

Weather Station is PIC16F877A based and has a 4x20 LCD, a data logger output and accepts 1Wire wind instrument. It has a built-in APRS TNC. Connect it to your portable rig thru a DIN5 connector and you have a true portable weather station.




Digital Video Selector 1.0
Posted on Wednesday, April 21, 2010   •   Category: Video

Digital Video Selector 1.0






PIC12F675 - Flashing LED
Posted on Wednesday, April 21, 2010   •   Category: PIC

PIC12F675 - Flashing LED

Simple little circuit for testing PIC12F675 microcontroller. When you start learning a programming language like C++, Visual Basic or any other language your first step is to write a program that displays "Hello World" on a computer's monitor. When you start learning how to program PIC microcontrollers an equivalent to that is blinking a LED.




USB-PC 8-CH Power Switch
Posted on Wednesday, April 21, 2010   •   Category: USB Circuts

USB-PC  8-CH Power Switch

PowerSwitch provides 8 bits of parallel output intended to switch e.g. the power supply to electronic devices. The PowerSwitch firmware is accompanied by a command line tool for Unix to control the device. (The command line tool can also be compiled on Windows using minGW and libusb-win32.)




USB LED Load
Posted on Tuesday, April 20, 2010   •   Category: USB Circuts

USB LED Load

The board supports driving two separate tri-color LEDs. More can be setup inline if desired. Currently the software only uses the second LED and its color represents the CPU load of the system in real-time. Blue for idle and gradients light blue, green, yellow, orange, and finally red indicating heavy CPU utilization. If the system fails to respond, the LED begins flashing RED to indicate a lack of communication from the software. This lets you easily identify a crashed machine in a rack for example.




LCD 2 USB
Posted on Tuesday, April 20, 2010   •   Category: AVR

LCD 2 USB

LCD2USB is a open source/open hardware project. The goal of LCD2USB is to connect HD44780 based text LCD displays to various PCs via USB. LCD2USB was meant to be cheap and to be made of easily available parts. It is therefore based on the Atmel AVR Mega8 CPU and does not require any difficult to obtain parts like separate USB controllers and the like.




AVR-USB Remote Sensor
Posted on Tuesday, April 20, 2010   •   Category: AVR

AVR-USB  Remote Sensor

RemoteSensor is a wireless thermo- and hygrometer with an USB port on the receiver. You can draw fancy diagrams of temperature and humidity for up to 16 wireless sensors.




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