mdb-esp32-cashless
nodestark
ESP32-based MDB cashless device for vending machines, supporting EVA DTS DEX/DDCMP telemetry and payments over the MDB protocol via Bluetooth and MQTT
Components (27)
| Reference | Value | Description |
|---|---|---|
| Q7 | MMBT3904 | 0.2A Ic, 40V Vce, Small Signal NPN Transistor, SOT-23 |
| U1,U4 | TLP785 | DC Optocoupler, Vce 80V, CTR 50-200%, DIP4 |
| U3 | ESP32-S3FH4R2 | |
| U5 | LM2594HVM-3.3 | 3.3V, 0.5A SIMPLE SWITCHER® Step-Down Voltage Regulator, Maximum VIN 60V, SOIC-8 |
| C1,C15 | 1uF | |
| C2 | 220uF | Polarized capacitor |
| C3 | 100uF | Polarized capacitor |
| C4 | 1.8pF | |
| C5,C6 | 12pF | |
| C7,C12,C14,C16,C17 | 0.1uF | |
| C13 | 10uF | |
| D1,D2,D5 | D_Schottky | Schottky diode |
| D4 | XL-2121RGBC-2812B | RGB LED with integrated controller, 2.0 x 2.0 mm, 12 mA |
| FB2 | FerriteBead | Ferrite bead, small symbol |
| J1 | MDB_Connector | Generic connector, double row, 02x03, top/bottom pin numbering scheme (row 1: 1...pins_per_row, row2: pins_per_row+1 ... num_pins), script generated (kicad-library-utils/schlib/autogen/connector/) |