Laser Transmitter - Fiber Optic - Receiver

The device consists of a transmitter that sends both analog music signals, which can be imported via Bluetooth, a micro SD card or a USB stick, as well as 5V digital signals via a chinch socket, and the associated receiver with two chinch sockets for the analog and digital signal. Transmitter and receiver can be linked directly or by using a glass fibre.

The transmitter sends an amplitude-modulated laser light with a class 2 laser diode with a power of up to one milliwatt and is permitted in schools (with a warning lable).

The receiver is equipped with a silicon photodiode. This generates a low AC voltage at the analog output even when it is switched off, but with noticeable distortions. When the receiver is switched on, a reverse voltage is applied and the diode is automatically adjusted to a correct operating point so that a distortion-free signal is obtained with different light intensities. A 1-bit signal is then present at the digital output. The green light-emitting diode visible through the transparent cover shows the value of the digital output. If the light intensity is high, the value is zero. Both sender and receiver are equipped with generously dimensioned lithium batteries, which can be charged with 5V through a micro-USB socket. Built-in charging electronics ensure safe charging so that a charger can be connected in continuous operation. In addition, the power supply for operation can also be provided through the micro-USB socket.

The necessary stabilized operating voltages are generated internally by voltage converters.

Important note: This item cannot be shipped internationally because it contains lithium batteries.