โ
Must-Have Components for Stable Operation
| Component | Purpose |
|---|
| ATtiny MCU | The brains of your project ๐ง |
| Power Supply (3.3V or 5V) | Stable voltage source from battery, regulator, or USB |
| 0.1 ยตF Ceramic Capacitor | Bypass capacitor between Vcc and GND for power noise filtering โก |
| Reset Button (optional) | To manually reset the chip (only if RESET pin is active) |
| 10kฮฉ Pull-Up Resistor on RESET | Prevents false resets if RESET is not disabled via fuse bits |
| ISP Series Resistors (optional) | ~1kฮฉ protection when programming ATtiny in-circuit |
๐งฉ Basic Stable Circuit (ATtiny85 Example)
- Use
INPUT_PULLUP for buttons to avoid external resistors.
- Keep the power lines clean and tight!
๐ 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 |
๐ฆ Recommended Extras for Smooth Operation
| Component | Why It Helps |
|---|
| 10 ยตF Electrolytic Cap | Additional power smoothing, good for servos |
| Low ESR Ceramic Cap | Filters high-frequency noise |
| Perfboard or PCB | Avoids flaky connections from breadboards |
๐ ๏ธ Optional Peripherals โ What to Add
| Peripheral | Add This |
|---|
| LEDs | 220โ330ฮฉ resistors on each pin |
| Buttons | Use INPUT_PULLUP or external 10kฮฉ resistor |
| OLED / LCD | Add 0.1ยตF and 10ยตF on Vcc near display |
| Servos / Motors | Use separate power + decoupling caps |
๐กBroadcast the signal โ amplify the connection.
