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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. |
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| | '''NOTE:''' Only the DIP-14 version (image) has the Vz pin, which is used for negative regulators. The Metal Can and the Flat-Pack do not have enough pins so exclude the Vz. | | '''NOTE:''' Only the DIP-14 version (image) has the Vz pin, which is used for negative regulators. The Metal Can and the Flat-Pack do not have enough pins so exclude the Vz. |
| | |- | | |- |
| − | | | + | | |
| | + | |- |
| | + | ! colspan="2" align="left"| Switching Regulators |
| | + | |- |
| | + | | align="center"| [[Image:MCP1253-ADJ.png|69px]]<br>[[MCP1252/3]] |
| | + | | Extremely Efficient, 120mA Flyback Switching Regulators. |
| | + | |- |
| | + | |} |
| | + | |
| | + | == Microcontrollers == |
| | + | |
| | + | * [[Image:lpc2103.jpg|69px|LPC2103]] [http://www.k9spud.com/arm/lpc2103/ LPC2103] Low cost 70MHz ARM7TDMI-S FLASH Microcontroller from Philips. The [http://coridiumcorp.com/arm7/ "$49" "Coridium ARMmite"] does use this chip. |
| | + | * [[Atmel]] AVR 8 bit FLASH microcontrollers |
| | + | * [[Microchip]] PIC 8 bit FLASH microcontrollers |
| | + | * Microchip dsPIC 16 bit FLASH microcontrollers ( [[DsPIC30F 5011 Development Board]] ) |
| | + | * Cypress PSoC 8 bit FLASH microcontrollers |
| | + | |
| | + | ''I've written a little about the various kinds of microcontrollers at [http://en.wikibooks.org/wiki/Embedded_Systems/Particular_Microprocessors Wikibooks: Embedded Systems]. --[[User:DavidCary|DavidCary]] 06:15, 10 March 2007 (PST)'' |
| | + | |
| | + | == Op Amps == |
| | + | |
| | + | Op amps and instrumentation amps. |
| | + | |
| | + | [[op amp]]s: great for amplifying weak signals from [[sensors]] to a more useful level. Also used in filters, integrators, etc. |
| | + | |
| | + | * [[LT1168|LT1168 Programmable-Gain Precision Instrumentation Amplifier]] - Low Power, Single Resistor Gain Programmable, Precision Instrumentation Amplifier |
| | + | * [[LT1114|LT1114 Low Power Precision OP-Amps]] are used for amplification and filtering of the signal - Dual/Quad Low Power Precision, Picoamp Input Op Amps |
| | + | |
| | + | * [http://en.wikibooks.org/wiki/Electronics/Op-Amps Wikibooks:Op-Amps] has a "quick design process" using Daisy's theorem: ''"The sum of the gains = +1 in a properly-designed op amp circuit."'' |
| | + | |
| | + | * [http://ciphersbyritter.com/RADELECT/PREOPAMP/OPAMPDSN.HTM "Some Op Amp Audio Design Issues"] by Terry Ritter |
| | + | |
| | + | == logic gates == |
| | + | |
| | + | * NAND gate: [http://www.coprolite.com/art48.html "Using a NAND Gate for a Set/Reset Latch"] (the 74HC132 Schmitt-trigger quad NAND is better than the 74HC00 quad NAND). |
| | + | * [http://people.freenet.de/dieter.02/alu_4.htm "Multiplexers: the tactical Nuke of Logic Design"] by Dieter Mueller 2004 (74153) |
| | + | |
| | + | There are hundreds of other specialized logic gates. Here we only list the ones we actually use in some Open Circuit [[Projects|Project]]: |
| | + | |
| | + | * 74HC595 eight bit shift register with output latch (used for POV display) |
| | + | |
| | + | == RF ICs/Modules == |
| | + | |
| | + | [http://www.linxtechnologies.com/ Linx Technologies] makes several low power RF transmitter/receiver chips. Their range is around 500' - 1000'. They are geared for one way communication only, like keyless entry systems. They also make several serial encoding chips that make the wireless communication more secure/crack proof. Their latest chip, the HS series, is based upon the SkipJack algorithm developed by the NSA. |
| | + | [[Category:Components]] |
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.
Voltage Regulators
Microcontrollers
I've written a little about the various kinds of microcontrollers at Wikibooks: Embedded Systems. --DavidCary 06:15, 10 March 2007 (PST)
Op Amps
Op amps and instrumentation amps.
op amps: great for amplifying weak signals from sensors to a more useful level. Also used in filters, integrators, etc.
- Wikibooks:Op-Amps has a "quick design process" using Daisy's theorem: "The sum of the gains = +1 in a properly-designed op amp circuit."
logic gates
There are hundreds of other specialized logic gates. Here we only list the ones we actually use in some Open Circuit Project:
- 74HC595 eight bit shift register with output latch (used for POV display)
RF ICs/Modules
Linx Technologies makes several low power RF transmitter/receiver chips. Their range is around 500' - 1000'. They are geared for one way communication only, like keyless entry systems. They also make several serial encoding chips that make the wireless communication more secure/crack proof. Their latest chip, the HS series, is based upon the SkipJack algorithm developed by the NSA.
LPC2103 Low cost 70MHz ARM7TDMI-S FLASH Microcontroller from Philips. The "$49" "Coridium ARMmite" does use this chip.
