eYFi-Mega based Audio Synthesizer

Mentor(s) : Sourav, Prasad, eYRDC
Interns : Aravinda Harithsa, Marefat Abbas

Circuit Schematic

Components Used

1. eYFi Mega Development Board -

  • ATmega2560 and ESP32 based development board
  • Arduino Programming Language Compatible
  • Wi-Fi compatible
  • Over-The-Air Update
  • Bluetooth Low Energy
  • Compatible with FreeRTOS

2. 8 Ohm 0.5W Small MINI speaker -

  • Rated Impedance: 8 â±20% î (at 1khz)
  • 8 Ohm Resistance
  • 0.5 W Power Rating
  • Frequency Range: ~600-10khz
  • Resonance Frequency (fo): 680 â±20% Hz at 1V
  • Diameter: 28mm / 1.1

3. 4x4 Universial 16 Key Keypad -

  • Operating pressure : Touch feeling: 170 ~ 397g (6 ~ 14oz).
  • Switch travel : Touch-type: 0.6 ~ 1.5mm.
  • Circuit Rating : 35V (DC), 100mA, 1W.
  • Contact resistance : 500 (Ω).
  • Insulation resistance : 100M (Ω).
  • Key Operating Force : 150-200N.
  • Rebound Time : 1 (ms).