Nod mobil VHF/UHF cu RDA1846 și RPI Zero W
Scopul acestui proiect este un nod mobil de RoLink realizat ca shield pentru un Raspberry Pi Zero W care va asigura comunicarea cu internet-ul. RDA1846 este un transceiver care stă la baza portabilelor chinezești ieftine (Baofeng etc).
Status
- Rev1.0 – Experimental, prototip, în lucru.
| Data | Activitate | Status |
|---|---|---|
| 24/10/2022 | Schemă și proiectare PCB | în lucru |
| 20/10/2022 | Documentare detaliată | în lucru |
| 23/02/2020 | Documentare inițială | în lucru |
Documentație
- RDA1846 - Single Chip Transceiver for Walkie-Talkie
- RDA1846 Programming Guide
- Pagina cu documentație I2S
Componente
- CS4344/5/8 – The CS4344 family members (CS4344, CS4345, and CS4348) are complete, stereo digital-to-analog output systems including interpolation, multibit D/A conversion and output analog filtering in a 10-pin package. The CS4344 family supports major audio data interface formats. Individual devices differ only in the supported interface format.
- WM8960 – The WM8960 is a low power, high quality stereo CODEC designed for portable digital audio applications. Stereo class D speaker drivers provide 1W per channel into 8 loads with a 5V supply. Low leakage, excellent PSRR and pop/click suppression mechanisms also allow direct battery connection to the speaker supply. Flexible speaker boost settings allow speaker output power to be maximised while minimising other analogue supply currents. A highly flexible input configuration for up to three stereo sources is integrated, with a complete microphone interface. External component requirements are reduced as no separate microphone, speaker or headphone amplifiers are required. Advanced on-chip digital signal processing performs automatic level control for the microphone or line input. Stereo 24-bit sigma-delta ADCs and DACs are used with low power over-sampling digital interpolation and decimation filters and a flexible digital audio interface. The master clock can be input directly or generated internally by an onboard PLL, supporting most commonly-used clocking schemes. The WM8960 operates at analogue supply voltages down to 2.7V, although the digital supplies can operate at voltages down to 1.71V to save power. The speaker supply can operate at up to 5.5V, providing 1W per channel into 8Ω loads. Unused functions can be disabled using software control to save power. The WM8960 is supplied in a very small and thin 5x5mm QFN package, ideal for use in hand-held and portable systems.
- WM8962B – Înlocuitorul lui WM8960
- Cirrus Logic Discontinued Products
- MAX9880A – Low-Power, High-Performance, Dual I²S, Stereo Audio Codec; The MAX9880A is a high-performance, stereo audio codec designed for portable consumer applications such as smartphones and tablets. Operating from a single 1.8V supply to ensure low-power consumption, the MAX9880A offers a variety of input and output configurations for design flexibility. The MAX9880A can be combined with an audio subsystem, such as the MAX9877 or MAX9879, for a complete audio solution for portable applications.
TODOs pentru Rev2.0
n/a