Integrated Circuits
The digital Potentiometers made by analog devices (AD5204) has 255 positions can be adjusted by the microcomputer that can receive commands from the computer. This is a great way for analog circuitry to have digital control. This is a chip with 4 digitally controlled POTs and the pots can be daisy chained to have multiple chips controled by a single SPI interface.
Digikey Part Number: AD5204BN10-ND
AD5204 - 4-Channel, 256-Position Digital Potentiometer
http://www.analog.com/images/Product_Descriptions/40826AD5204_S.jpg
Datasheet: http://www.analog.com/UploadedFiles/Data_Sheets/140808745AD5204_6_0.pdf
Availability:
- Free samples: http://www.analog.com/en/prod/0,,761_797_AD5204,00.html#price
- Digikey: http://www.digikey.com/scripts/DkSearch/dksus.dll?Detail?Ref=1480&Row=284443&Site=US (10k version - $5.02)
Eagle footprint data:
Eagle library (footprint, schematic symbol)
voltage regulator
LT1528 High current, Variable Voltage Regulator
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Basic Voltage Regulators Variable voltage regulators, set output regulators, we give you the whole breakdown. Perfect for use with an external wall-wart power supply.
microcontroller
LPC2103 Low cost 70MHz ARM7TDMI-S FLASH microcontroller from Philips.
other
op amps: great for amplifying weak signals from sensors to a more useful level. Also used in filters, integrators, etc.
