Posted on Monday, April 19, 2010 • Category:
PIC
PICNIC is a project to add 10BaseT Ethernet controller to PIC17F877, and it can run as an network-enable device.
This project is based on tristate's PICNIC product. And I just change the temperature sensor's circuits to improve the precision on A/D convert and add another Temp-Sensor channel.
Posted on Monday, April 19, 2010 • Category:
USB Circuts
USB LCD/VFD Controller is a HD44870 based LCD/VFD controller via USB interface. The control command is compatible with Matrix-Orbital's LCD module.
So, you can use any MO friendly software to control this baby. Such as LCDC...
The firmware are based on David Potter's Serial LCD/VFD Display, but I almost rewrite the entire code.
Posted on Monday, April 19, 2010 • Category:
AVR
The DTMF decoder 2 is a useful tool used for decoding DTMF (Dual Tone Multi frequency) generated by telephones. The decoded digits are viewed on a 16x2 LCD screen.
Posted on Monday, April 19, 2010 • Category:
USB Circuts
Why build my own USB to RS232 converter when there are adapters already available from many suppler?
The Answer is simple:
Neither the strand "USB to RS232 converter" actually worked *properly* with all the devices I tried. But, They did not seem to support ALL the RS232 lines.
The USB to RS232 converter using the FT8U232AM and a Maxim-IC MAX235
Posted on Friday, April 16, 2010 • Category:
PC Circuits
Using an add-on card to the already existing avr ethernet board we build a weather station. That is: A weather station with a build-in webserver.
My original plan was to have sensors for temperature, air pressure and wind. I started a prototype and it worked very well except for the wind measurement part. I plan to improve the wind measurement hardware and add it at a later point in time.
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