Difference between revisions of "Popular Parts"
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I keep 4 megHz and 20 meg Hz on hand. Note that some PICs can do without crystals, but timing is not very accurate. Check your spec. sheet, some PICs may be able to go to 40 meg Hz. Note that a couple of capicators are needed as well. Ceramic resinoaters ( sp ) may be used instead. | I keep 4 megHz and 20 meg Hz on hand. Note that some PICs can do without crystals, but timing is not very accurate. Check your spec. sheet, some PICs may be able to go to 40 meg Hz. Note that a couple of capicators are needed as well. Ceramic resinoaters ( sp ) may be used instead. | ||
| + | *[http://www.sparkfun.com/commerce/product_info.php?products_id=534 Crystal 20MHz] | ||
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*4 meg Hz | *4 meg Hz | ||
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Can be used as pull down as well. I use 10k ohms, often useful for other stuff as well. | Can be used as pull down as well. I use 10k ohms, often useful for other stuff as well. | ||
| + | *[http://www.futurlec.com/Res14WMF.shtml Metal Film 1%] 10 for 20 cents. | ||
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10K | 10K | ||
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|Push Button | |Push Button | ||
|Need this for input. I get mine from salvage. Later I will find a source for you. | |Need this for input. I get mine from salvage. Later I will find a source for you. | ||
| + | *[http://www.sparkfun.com/commerce/product_info.php?products_id=97 Mini Push Button Switch] | ||
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*whatever | *whatever | ||
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|Sensors | |Sensors | ||
|There are so many, for light photo diodes and transistors, for temperature LM34 and similar see section on [[Sensors]]. | |There are so many, for light photo diodes and transistors, for temperature LM34 and similar see section on [[Sensors]]. | ||
| − | |whatever | + | |*whatever |
| − | <!----------------------------- | + | <!-----------------------------> |
|-valign="top" | |-valign="top" | ||
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|Often used to expand the number of ports, I need a bit more research here. | |Often used to expand the number of ports, I need a bit more research here. | ||
|? | |? | ||
| − | <!----------------------------- | + | <!-----------------------------> |
|-valign="top" | |-valign="top" | ||
| − | | | + | |LCD Display |
| − | | | + | |Put out full alpha numeric data, several characters. Seems like a better? solution than LED when many characters are required. Probably best used with a controller to keep use reasonably simple. |
| − | | | + | *[http://www.sparkfun.com/commerce/product_info.php?products_id=255 Basic 16x2 Character LCD STN - Black on Green] |
| + | |*HD44780 parallel interface | ||
<!----------------------------- | <!----------------------------- | ||
Revision as of 14:32, 11 February 2008
Another new page by russ_hensel, not much more than a stub now. Feel free to join in with your recommendations.
Contents
Popular
So many parts, so many variations, which to pick. Why not try to see what is popular:
- The Big List These are the parts the EE Shop keeps in stock to sell to students. UNL likes them why not us?
- This section contains circuit examples from commercial products and datasheets of transistors which are studied in this course. If MIT studdies them, maybe they are worth looking at.
- Choosing an op amp: it's no longer a trying task The oldies in particular may be good, but not expensive parts.
- Starting with PICmicro controllers See the Selecting a PIC Section
Kits and Projects
If you are working from a kit or a published project consider getting extras of the parts. If you use them once you may use them again. Also the authors of these things tend to know and pick what is popular. Always think about; it there are parts that are exceptions that you would never use again.
If you are working with X then Y
X=PIC's
| What | Comment | Specific Part
|
|---|---|---|
|
The PIC |
|
16F877?
|
|
Proto Board |
Some People hate them, but many find them a nice quick way to experiment. I have found a max clock speed of 4 megHz works well. |
?
|
|
Crystals |
I keep 4 megHz and 20 meg Hz on hand. Note that some PICs can do without crystals, but timing is not very accurate. Check your spec. sheet, some PICs may be able to go to 40 meg Hz. Note that a couple of capicators are needed as well. Ceramic resinoaters ( sp ) may be used instead. |
|
|
Pull Up Resistors |
Can be used as pull down as well. I use 10k ohms, often useful for other stuff as well.
|
10K |
|
Voltage Reg |
Easy choice is LM7805. A couple of caps usually go with it. .1 and .01 bypass caps are generally useful. |
|
| Op Amp | Need to condition you inputs, a op amp may be just the thing, see section on op amps. | |
| LED | How else can you say hello world? Pretty much anything will do. Do not forget to get a current limiting resistor 220 ohms or anything close. LED also come in arrays and as 7 segment displays for numerical read out. |
|
| Push Button | Need this for input. I get mine from salvage. Later I will find a source for you. |
|
| Low Side Switch, Driver Chip | When you need more power from an output port this is the way to get more than 10 times a much current, Not very expensive. One chip will drive 2 stepper motors. ULN2803 has 8 inputs and outputs. | ULN2803 |
| High Side Switch Driver Chip | Like a low side switch, but on the high side. If you are driving "rows and columns" then you need some on the low side some on the high side. The UDN2981 has 8 inputs and outputs. | UDN2981 |
| Sensors | There are so many, for light photo diodes and transistors, for temperature LM34 and similar see section on Sensors. | *whatever |
| Shift Registors | Often used to expand the number of ports, I need a bit more research here. | ? |
| LCD Display | Put out full alpha numeric data, several characters. Seems like a better? solution than LED when many characters are required. Probably best used with a controller to keep use reasonably simple. | *HD44780 parallel interface |
X=Op Amps
| What | Comment | Specific Part
|
|---|---|---|
| Op Amps | Of Course, consider: |
|
|
Proto Board |
Some People hate them, but many find them a nice quick way to experiment. |
?
|
| Resistors | For precise gain you need 1 percent resistors. I start with 10k and use multiples and sub multiples. |
|
| trim pots | When you need a bit of adjustability. |
|
| Power Transistors | An op amp might be good for 20 ma. Couple it to a darlington transistor and get an amp. You may want to go push pull with a pair of npn and pnp transistors. With this you can build power supplies, battery charges, motor drivers, and audio amplifiers. | TIPsomething |
| Sensors | Measure something. See Sensors. | Sensors
|
X=Digital Logic
| What | Comment | Specific Part
|
|---|---|---|
| Gates |
| |
|
Counters |
?
| |
| Shift Registors |
| |
| Voltage Regs | Power to the Chips |
|
