Parts (Electronics): Difference between revisions
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TO stands for transistor-outline. | TO stands for transistor-outline. | ||
== Linear Components == | |||
=== Resistors === | |||
Resistors are typically 1/4W. The cost for these is negligible, assortment packages typically come in around 0.6¢ per resistor. To handle higher wattage, they can be used in parallel. | |||
=== Capacitors === | |||
Electrolytic up to 220uF are very cheap (2.8¢) and available in assortment packs. Up to 2200uf is still pretty cheap, 7.5¢ with a 1000uF@10v cap coming in around 5.6¢. Beyond this, the goes up rapidly for either additional capacitance or voltage with a 2200uF@25v around 50¢. | |||
Ceramics are cheap up to 100nf, also available in assortment packs (0.4¢). | |||
=== Inductors === | |||
Small inductors are fairly cheap; assortment packs of 1/2w from 1uH to 4.7mH 5.5¢ a piece. They look like resistors. | |||
Revision as of 18:24, 10 November 2015
IC
| Part | Name | Cost | Notes |
|---|---|---|---|
| 555/556 | Timer | $2.15 / 50 | |
| LM741 | Op Amp | $1.20 / 10 | |
| LM317 | Linear reg. | $1.30 / 10 | |
| LM78xx | Linear reg. | $1.30 / 10 | The xx is the voltage; 05,06,08,10,12,15,18,24 |
Microcontrollers
| Name | Cost | I/O | Flash | Speed | Peripherals | Notes |
|---|---|---|---|---|---|---|
| ATTINY85 | 60¢ | 6 | 8K | 2pwm, 2-8 timer, 1adc | 20MHz | Small dev boards are available for around $1.75 |
| ATMEGA8 | 90¢ | 23 | 8K | 16MHz | 3pwm, 2adc, 2-8/1-16 timer | Small dev boards are available for around $1.75 |
Modules
| Name | Cost | Description |
|---|---|---|
| Voltage Meter | $2.00 | 3x7seg LED, generally wide ranges of voltages |
| Buck Module | $2.50 | (4-40v) → (1.3-37v) @ 2A; includes led panel. Found a 9A version for $5, no display. |
Semiconductors
| Part | Cost | Limit | Part |
|---|---|---|---|
| PNP BJT (TO-92) | $1.43 / 100 | 40v 200mA | 2N3906 |
| NPN BJT (TO-92) | $1.20 / 100 | 60v 200mA | |
| NPN BJT (TO-92) | $1.20 / 100 | 60v 200mA |
Packages
| Name | Description |
|---|---|
| TO-92 | Small black, semi circle, 3 leads from the bottom |
| DIP | dual in-line pin, pins are 1/10" apart, 1/4" wide |
| TO-3 | metal can, good for heat dissipation, cheap heat-sinks, shaped like a rounded diamond about 1"x1.5", leads are .43" apart |
| TO-220 | metal tab heatsink |
TO stands for transistor-outline.
Linear Components
Resistors
Resistors are typically 1/4W. The cost for these is negligible, assortment packages typically come in around 0.6¢ per resistor. To handle higher wattage, they can be used in parallel.
Capacitors
Electrolytic up to 220uF are very cheap (2.8¢) and available in assortment packs. Up to 2200uf is still pretty cheap, 7.5¢ with a 1000uF@10v cap coming in around 5.6¢. Beyond this, the goes up rapidly for either additional capacitance or voltage with a 2200uF@25v around 50¢.
Ceramics are cheap up to 100nf, also available in assortment packs (0.4¢).
Inductors
Small inductors are fairly cheap; assortment packs of 1/2w from 1uH to 4.7mH 5.5¢ a piece. They look like resistors.