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Recent content by koopi

  1. K

    Question about Avalanche Photodiode (APD)

    Hi everyone, How can I reach the breakdown voltage without applying the voltage written in the datasheet (80 volts!) , can I build a simple amplifier circuit with a battery of 5 V? I wonder because every regular range meter with APD has a battery of 3 volts, so how do they reaching the...
  2. K

    Infrared LED communication question

    Ir infrared communication Hi everyone, I want to use an IR laser diode to communicate with my TSOP 38Khz photodiode reciever for large distance (1KM) using optics. can someone recommend on a good and foucsed IR laser diode for my type of work?
  3. K

    Infrared LED communication question

    I built an IR communication system . the transmitter controlled by arduino and modulated in 38Khz. the reciever is also controlled by arduino (another one) and demodulting the transmitter signals. everything is great so far. now i want to enlarge the communication range up to 1 kilometer and...
  4. K

    Infrared led modulation

    Hi guys, Is there any communication protocol for 1Mhz or greater (IR LED) ? Does the frequency effect the range of communication ? (i.e the greater the freqcuency the less range or the opposite) tnx very much!

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