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.