talking_clock
lhm0
A talking clock for visually impaired users. ESP32 controlled, fully offline, long battery life.
Components (18)
| Reference | Value | Description |
|---|---|---|
| Q1,Q2 | 2N7000 | N-MOSFET transistor, source/gate/drain |
| Q3 | IRLML6401 | |
| U1 | TPS63070 | |
| U2 | HEF4093B | Quad 2-Input NAND Schmitt Trigger, SOIC-14 |
| U3 | MAX98357A | |
| U4 | DS3231 | |
| A1 | Waveshare_ESP32-S3_Pico | Arduino Nano board based on the ESP32-S3 with a dual-core 240 MHz processor, 384 kB ROM, 512 kB SRAM. Operates at 3.3V, with 5V USB-C® input and 6-21V VIN. Features Wi-Fi®, Bluetooth® LE, digital and analog pins, and supports SPI, I2C, UART, I2S, and CAN. |
| C1 | 220µF, 16V | Polarized capacitor |
| C2,C3 | 100nF |