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| + | == Digital Potentiometers == |
| | [[Digital Potentiometers|Digital Potentiometers(AD5204)]] | | [[Digital Potentiometers|Digital Potentiometers(AD5204)]] |
| | 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. | | 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. |
Revision as of 01:23, 25 December 2007
== Digital Potentiometers ==
Digital Potentiometers(AD5204)
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.
Unlike a mechanical POT, digial POTs often have the restriction that the three terminals of the POT needs to be < VCC and > GND making these devices harder to use in applications such as LCD contract adjustment where the contrast is controlled by a voltage lower then GND.
Voltage Regulators
