Parts (Electronics)
IC
| Part | Name | Cost | Notes |
|---|---|---|---|
| 555/556 | Timer | $2.15 / 50 | |
| LM741 | Op Amp | $1.20 / 10 |
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. |
Non-Linear components
| Part | Cost | Limit |
|---|---|---|
| PNP BJT (TO-92) | $1.70 / 100 | 50v 100mA |
| NPN BJT (TO-92) | $1.20 / 100 | 60v 200mA |
| NPN BJT (TO-92) | $1.20 / 100 | 60v 200mA |