pcb layout.pdf - Parts List Semiconductors IC1 AT89C2051...

This preview shows page 1 out of 1 page.

Unformatted text preview: Parts List Semiconductors: IC1 - AT89C2051 microcontroller IC2 - ADC0831 analogue-to-digital converter IC3 - MCT2E optocoupler IC4 - 7805, 5V regulator T1 - BC547 npn transistor T2 - BS170 n-channel MOSFET T3 - IRF540 n-channel MOSFET D1 - 6A4 rectifier diode D2-D4 - 1N4007 rectifier diode ZD1 - 7.5V zener diode Resistors (all ¼-watt, ±5% carbon): R1 - 8.2-kilo-ohm R2 - 1.2-kilo-ohm R3, R4, R6-R11 - 10-kilo-ohm R5 - 20-kilo-ohm R12 - 330-ohm Capacitors: C1 C2 C3, C7 C4, C9 C5, C6 C8 Miscellaneous: S1 S2 RL1 XTAL LCD Solar panel Fig. 3: A single-side, actual-size PCB layout for microcontroller-based solar charger - 100µF, 63V electrolytic - 100µF, 16V electrolytic - 0.1µF ceramic disk - 10µF, 16V electrolytic - 33pF ceramic disk - 0.01µF ceramic disk - On/off switch - Push-to-on switch - 12V, 1C/O relay - 12MHz crystal - 16×2 line display - 10-40W - 10A fuse 6. Deep-discharge protection 7. Low battery lock 8. Charging current changes to ‘pulsed’ at full charge 9. Low current consumption Fig. 4: Component layout for the PCB 10. Highly efficient design based on microcontroller 11. Suitable for 10-40W solar panels for 10A load The circuit of the solar charge controller is shown in Fig. 1. It comprises microcontroller AT89C2051, serial analogue-to-digital converter ADC0831, optocoupler MCT2E, regulator 7805, MOSFETs BS170 and IRF540N, transistor BC547, LCD and a few discrete components. Component description is given below. Microcontroller. Microcontroller AT89C2051 is the heart of the circuit. It is a low-voltage, high-performance, 8-bit microcontroller that features 2 kB of Flash, 128 bytes of RAM, 15 input/output (I/O) lines, two 16-bit timers/counters, a five-vector two-level interrupt architecture, a full-duplex serial port, a precision analogue comparator, on-chip oscillator and clock circuitry. A 12MHz crystal is used for providing the basic clock frequency. All I/O pins are reset to ‘1’ as soon as RST pin goes high. Holding RST pin high for two machine cycles, while the oscillator is running, resets the device. Power-on reset is derived from resistor R1 and capacitor C4. Switch S2 is used for manual reset. Serial ADC. The microcontroller monitors the battery voltage with the help of an analogue-to-digital converter. The ADC0831 is an 8-bit successive approximation analogue-to-digital converter with a serial I/O and very low conversion time of typically 32 µs. The differential analogue voltage input allows increase of the 68 Solar Charger For Dusk-To-Dawn Use ...
View Full Document

  • Winter '18
  • pcb layout, transistor BC547

{[ snackBarMessage ]}

Get FREE access by uploading your study materials

Upload your study materials now and get free access to over 25 million documents.

Upload now for FREE access Or pay now for instant access
Christopher Reinemann
"Before using Course Hero my grade was at 78%. By the end of the semester my grade was at 90%. I could not have done it without all the class material I found."
— Christopher R., University of Rhode Island '15, Course Hero Intern

Ask a question for free

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern