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0-24VDC Digital PIC Power Supply

Konusu 'Güç Kaynakları - Besleme Devreleri' forumundadır ve guclusat tarafından 13 Ekim 2015 başlatılmıştır.

  1. guclusat
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    guclusat Tanınmış Üye Süper Moderatör

    Katılım:
    14 Haziran 2009
    Mesajlar:
    9.754
    Ödül Puanları:
    48
    This is 0-24VDC digital PIC power supply circuit. This variable power supply controlled with PIC microcontroller. There is LCD display in this circuit which will show the actual value of power supply output. This power supply use push on switch to adjust the output voltage and current value.

    Schematic Diagram:

    [​IMG]

    Component List:
    C1 = 2000uF per AMP, 40V (adjust capacity to power supply amps)
    C2,C3,C12,C15,C18,C21 = 0.1uF CER
    C4 = 0.01uF CER
    C5A,C5B,C5C,C5D = 0.01uF CER
    C6,C7 = 0.05uF CER
    C8 = Not used
    C9,C11,C19,C20 = 1uF CER
    C10 = 470uF 15V EL RADIAL
    C13 = 4.7mF 50V EL RADIAL
    C14 = 0.001uF CER
    C16,C17 = 22pF CER

    D1,D2,D4,D5 = 1N4148
    D3 = 1N4004
    Br1 = 1<10A BRIDGE RECTIFIER (adjust seize to power supply amps)
    DZ1 = 1N4751 30V ZENER
    IC1 = LM317KCS TO220
    IC2 = LM337LZ TO92
    IC3 = LT1491CN special HV opamp, do not substitute
    IC4 = PIC16F876A
    Q1 = 2N3906
    Q2A to Q2D = TIP142TU 1 to 5 transistors (adjust quantity to power supply amps)
    Q3A to Q3D = 2N3904 (adjust quantity to power supply amps)

    X1 = 20 mHz HC49 DigiKey PN: 300-6042-ND

    LED1 = T1 3/4 RED OR GREEN LED
    LCD = LCD, 2X16, HD44780 intelligent controller DigiKey PN: 67-1758-ND insulate from case

    P1 = 500 Ohms
    P2 = 10 kOhms
    P3,P4 = 5 kOhms

    R1 = 1 kOhms 10W
    R2 = 1.5 kOhms
    R3,R11,R12,R13,R14,R16,R17,R25,R26,R27 = 10 kOhms
    R4 = 56 Ohms
    R5A to R5D = 0.22 Ohms (adjust quantity to power supply amps)
    R6,R28,R29 = 47k Ohms
    R7 = as per schematic (adjust value to power supply amps)
    R8 = 240 Ohms
    R9 = 270 Ohms
    R10 = 390 Ohms
    R15 = 39 kOhms
    R18 = 39 kOhms
    R19 = 8.2 kOhms
    R20,R22,R23,R32 = 1 kOhms
    R21 = 5.6 kOhms
    R24 = 33 Ohms 1/2W
    R30,R31 = 4.7 kOhms

    SW1 = SPST min toggle
    SW2,SW3,SW4,SW5,SW6,SW7,SW8,SW9 = NO_SP push button
    T1 = 24 V 1<8A (adjust seize to power supply amps)
    T2 = 6.3 V, 150 mA

    MISC:
    3 Terminals
    Transistors Heat Sink, up to: 1A = 30W, 2A = 60W, 4A = 120W, 8A = 240W to dissipate
    Line filter, Case PCB, IC sockets…

    PCB Layout:

    Top side:
    [​IMG]

    Bottom Side:
    [​IMG]
    SPECIFICATIONS

    VOLTAGE:

    • Ajustable from 0 < 25 Volts at a resolution of 100 mV.
    CURRENT: choice of 4 ranges;

    • 0 < 1.000A at a resolution of 1 mA. JP1 and JP2 open, C1 = 2000uF filter cap., R7 = 0.5 Ohm, T1 = 24V, 1Amp.
    • 0 < 2.000A at a resolution of 2 mA. JP1 ground and JP2 open, C1 = 4000uF filter cap., R7 = 0.25 Ohm, T1 = 24V, 2Amp.
    • 0 < 4.000A at a resolution of 4 mA. JP1 open and JP2 ground, C1 = 8000uF filter cap., R7 = 0.125 Ohm, T1 = 24V, 4Amp.
    • 0 < 8.000A at a resolution of 8 mA. JP1 and JP2 ground, C1 = 16000uF filter cap., R7 = 0.0625 Ohm, T1 = 24V, 8Amp.
    2 lines LCD display:

    • The top line shows the settings, the maximum current stays displayed at all times, it is not necessary to short the output terminals to set the maximum current.
    • The bottom line shows the measured values.
    • The arrows at the bottom center line show who is in control, the voltage or the current.
    Adjustments:

    • Voltage, steps of 1 V and 0.1 V.
    • Current, steps of 1, 2, 4, 8 mA and 50, 100, 200, 400 mA depending on the Amp range.
    • Memorisation of the last settings before power off, restarting with thoses same settings.
    Download the full document include schematic diagram, reference, pcb layout and program source code :

    0-24VDC PIC Power Supply 271.94 KB
    Download Circuit Manual
     

    Ekli Dosyalar:

    Son düzenleme: 14 Ekim 2016

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