1. S

    Photodiode with TTL output

    Hello, I am hoping that someone will be able to direct me towards the appropriate piece of hardware to purchase. I am a cognitive neuroscientist, hoping to stimulate a specific area of the brain using Transcranial Magnetic Stimulation. The onset of stimulation needs to be precise (~100ms) and...
  2. R

    Circuit Works on Breadboard But Not PCB

    Hello all! I've been trying to send and receive a signal by using TOSLink optical transmitters and receivers from Sys-Concept in the same circuit (making a transceiver of sorts): http://www.sys-concept.com/toslink_receiver.htm According to the data sheets of both the receiver and the...
  3. LordOfThunder

    Convert digital signal from TTL 5V to Raspberry Pi GPIO 3.3V

    Hello! I am a Ph.D. student in particle physics and for our experiment we need to convert a 5V TTL digital signal (16-bits actually) coming out of a Phillips 726 converter and read it using the GPIO pins of a Raspberry Pi 4. We do not need bidirectional communication. We just need to read this...