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  1. P

    Help needed for transmitting 15V signal to 10 metres at 8KB/s using RS232 or RS422 cable

    I'm trying to send and receive data using micro controller connected with external peripherals. Data line is equipped with 15V so I want to send 15V data over 10 metres with 7 data lines at 8KB/s. Can I modify the dedicated pins in RS232 or RS422 cable and can we change voltages to these cables...
  2. P

    Relation or difference between Input clamp current and Sink current

    I want to take signal from external peripherals to PIC micro-controller(PIC18F66K22) through buffer IC(74HC541). My problem is o/p of buffer source current is +/-35mA, output clamping current +/- 20mA and i/p of PIC18F66K22 PORTF pin is 2mA. And another case input clamp current of PIC18F66K22 is...
  3. P

    Detecting solenoid ON and OFF state

    I want to detect solenoid ON and OFF state. If solenoid ON, with respect to HIGH signal no problem. If solenoid not working means with respect to HIGH signal, solenoid remains OFF state. In that situation I have to generate HIGH or LOW signal. So I designed a circuit with XOX gate attached here...
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