TOSLINK-dat

TOSLINK

  • TOSLINK is a standardized optical fiber connection system for transmitting digital audio signals between devices.
  • It uses a fiber optic cable with a plastic or glass core to carry the light signal, which represents the audio data.

https://en.wikipedia.org/wiki/TOSLINK

DLT1120 fiber optic transmitter

Toslink DLT1120 fiber optic transmitter The light-emitting unit is a standard packaging product with connectors and optoelectronic components, and is packaged with LEDs and driver ICs. The function of the unit converts electrical signals into optical signals and transmits.

project SPDIF to TOSLink Adapter Hat for Quartz64

DLR 1121

DLR 2180

toslink-guide

TOTX178A

Optical SPDIF (TOSLINK):

  • Uses optical fiber (plastic or glass).
  • Has a TOSLINK connector (square-ish plug).
  • Carries light-based digital signals.
  • Immune to electrical interference (a bonus in noisy environments).

Why Not Use TOSLINK for Transferring 5V TTL Serial Signals?

While TOSLINK (optical) is a popular and widely used optical standard, especially for consumer audio (like SPDIF), it's not ideally suited for directly transferring TTL serial signals like 5V logic. Here's why POF (Plastic Optical Fiber) is often a better choice for serial TTL communication over TOSLINK:

🔍 Key Differences:

1. Signal Type:

  • TOSLINK (SPDIF) carries digital audio data, which is encoded in a biphase-mark format (a specific way of encoding 1s and 0s for audio).
    • It's not raw TTL, so you'd need a decoder or receiver chip to convert it back into useful serial data.
    • It's designed for audio signals, not serial communication.
  • POF (Plastic Optical Fiber) with TTL transceivers is specifically designed to carry digital data signals such as serial UART, which is just raw bits (high and low voltages) transmitted directly over light.

2. Electrical Compatibility:

  • TOSLINK optical transmitters and receivers are designed for audio signals that operate at relatively lower frequencies (44.1kHz or 48kHz for audio sampling).
    • TTL signals, on the other hand, are high-speed and require a continuous stream of binary data (e.g., 115200 baud rate or higher) without the need for extra encoding schemes.
  • POF with TTL transceivers directly handles 5V logic signals, making it simpler and more compatible with serial communication.

TOTX

TOTX147

  • connector-less

TOTX1350

SCH?

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