β
Must-Have Components for Stable Operation
| Component | Purpose |
|---|
| ATtiny MCU | The brains of your project π§ |
| Power Supply (3.3V or 5V) | Stable voltage source from battery, regulator, or USB |
| 0.1 Β΅F Ceramic Capacitor | Bypass capacitor between Vcc and GND for power noise filtering β‘ |
| Reset Button (optional) | To manually reset the chip (only if RESET pin is active) |
| 10kΞ© Pull-Up Resistor on RESET | Prevents false resets if RESET is not disabled via fuse bits |
| ISP Series Resistors (optional) | ~1kΞ© protection when programming ATtiny in-circuit |
𧩠Basic Stable Circuit (ATtiny85 Example)
- Use
INPUT_PULLUP for buttons to avoid external resistors.
- Keep the power lines clean and tight!
π Power Supply Options
| Power Source | Notes |
|---|
| CR2032 coin cell | For short-term portable use |
| Li-ion + LDO (AMS1117) | Stable 3.3V output, good for sensors & WiFi |
| USB 5V (via regulator) | Great for dev boards or breadboarding |
π¦ Recommended Extras for Smooth Operation
| Component | Why It Helps |
|---|
| 10 Β΅F Electrolytic Cap | Additional power smoothing, good for servos |
| Low ESR Ceramic Cap | Filters high-frequency noise |
| Perfboard or PCB | Avoids flaky connections from breadboards |
π οΈ Optional Peripherals β What to Add
| Peripheral | Add This |
|---|
| LEDs | 220β330Ξ© resistors on each pin |
| Buttons | Use INPUT_PULLUP or external 10kΞ© resistor |
| OLED / LCD | Add 0.1Β΅F and 10Β΅F on Vcc near display |
| Servos / Motors | Use separate power + decoupling caps |
π‘Broadcast the signal β amplify the connection.
