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  1. D

    design square waveform oscillator circuit/ relaxation oscillator

    hello all .. anyone that can help me design electronic circuit .. this is the characteristics of the circuit : one BJT, one OPAMP UA741 and single power supply. the oscillator will connected to a transistor with collector load of 10K the available frequency is between 200Hz to 1kHz. i hope that...
  2. D

    help me design electronic circuit

    hello all .. anyone that can help me design electronic circuit .. this is the characteristics of the circuit : one BJT, one OPAMP UA741 and single power supply. the oscillator will connected to a transistor with collector load of 10K the available frequency is between 200Hz to 1kHz. i hope that...
  3. D

    transformer problem

    hello guys .. iwant to know that if transformer with 220V/15kVA  1A is same as 220V/15kVA 5A ?  ???
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