Circuit Lake

The project describes how to build a Radio Controlled lawnmower using Arduino, a cheap R/C transmitter and receiver pair, and a couple of electric-wheelchair motors. It uses Mosfet h-bridge (N-channel and P-channel Mosfets) to control motor speed.To implement the Failsafe, John David, the designer, used another Atmega168 (or an Arduino), to control a normally-open 60amp power relay. The relay disconnects the power to the motor-controller unless receiving a "good" signal from the 2nd microcontroller. This signal is updated 2 times every second and is either ON or OFF. If the ...

This simple touch sensor project can be used to add a touch switch to your computer. It can detect when you touch a sensor connected to one of the sensor inputs. The project is built based on AVR AT90S2313 (you can replace it with ATtiny2313).The basic idea of circuit is really simple. Make one pin output and another input. Connect a resistor between these pins. The resistor together with the human capacitance (about 100 pF) forms an RC network. The AVR set the output to low and then make a ...

The project shows you how to add a USB interface to a standard HD44780 compatible LCD and emulates the CrystalFontz serial protocol over a virtual COM port created by the FTDI chip. This enables you to use already existing software to speak to the LCD, for example the popular program LCD Smartie. The circuit uses an AVR microcontroller, ATtiny2313, and a USB chip from FTDI. The usb chip creates a virtual COM port on the computer. It has an external EEPROM programmable via USB to store information and settings. You ...

LCD Smartie is software for Windows that you can use to show lots of different types of information on your LCD/VFD. It supports LCD/VFD's with a Hitachi HD44780 Controller, a Matrix Orbital Serial/USB LCD, Crystalfontz Serial/USB LCD, Seetron Serial LCD/VFD, IRTrans driven VFDs, SoundGraph iMON VFDs, Futaba VFDs, Pertelian LCDs, VL System L.I.S VFDs, IEE Inc. VFDs, and PalmOS devices (when used with PalmOrb).The software is written using Delphi 7, but plugins can be written in any language that allows you to build a DLL (Current Plugins are written in ...