Simple PIC USB Interface Circuit

Hardware design for USB is actually quite minimal, which is a big plus for us. However, what you quickly find out with USB is that the easy hardware design means the communication and control software is very complex, we`ll see more about that in the theory and software sections. The main devices used in the circuit are the PIC 18F4455, USB Connector and LM7805. The +5v output from the power
Simple PIC USB Interface Circuit - schematic

circuit comes from the LM7805 regulator. Notice the 47uF capacitors on the input and output. These are meant to be DC filtering capacitors, which smooth out the constant DC voltage being fed to the microcontroller from the 7805 regulator. Make sure you double check your USB pinout. A common mistake when wiring the PIC to the USB connector is getting the D+ and D- signals backwards. So if you`re sure that the PIC is running your perfect code, but the USB device isn`t coming up properly, switch D+ and D-, it might just magically fix your problem! The output LEDs will be simple `toggle` LEDs. The program running on our laptop will be able to toggle them on and off with the push of a button. The A/D circuit is a standard 3 pin, Connected to Power, Signal Out and Ground circuit. The signal output goes into RA0 which is the Analog to Digital converter. After the PIC converts this signal it should send the data to the Laptop via USB. The laptop will the visually display the trimpot`s value. The push button will do a similar thing, when the button is pushed, the laptop application should update with a notification that it has been pressed. These are simple ideas, but when done over USB they become rather complicated as we`ll see in the theory section.

Recommended videos

  • Populaire video
  • How to programming pic microcontroller Simple JDM programmer with circuit diagram
    Duration: 2:58.
  • Build JDM PIC Programmer(PIC) UNDER 5$ + Circuit Download
    Duration: 0:38.


  • Yahoo Finance
    Yahoo Finance Summit Announces 2017 Keynote Speaker20, 2017 /PRNewswire/ -- NY Summit announces Jeff Havens, corporate comedian and trainer, will deliver the keynote address at its 13th annual event taking place June 7-9 at Turning Ston
     20 January 2017
  • The Star Online
    The Star Online Legal and aboveboard?: Documents filed on Dec 30 in the Hawaii State court – and reported in the Honolulu Star Advertiser newspaper – show that three Zuckerberg companies filed the lawsuits under what is known as
     20 January 2017
  • TWN
    TWN Tech Stocks Flagged As Top Movers: Jabil Circuit, Inc. (NYSE:JBL), Yandex N.V. (NASDAQ:YNDX). January 19, 2017 Rodolfo Page 0 Comment Inc., Jabil ...
     19 January 2017
  • The Independent Republic
    Stocks To Look Out For: Ciena (CIEN), Jabil (JBL)Ciena Corporation (CIEN) ended last trading session with a change of 0.97 percent. It trades at an average volume of 2.75M shares versus 1.71M shares recorded at the end of last trading sess
     19 January 2017
  • Boston Business Journal
    Boston Business Journal Swanson served as CEO of Linear , another manufacturer, between 1981 and 2005. Analog Devices announced its plan to acquire California-based Linear for $14.8 billion in July 2016. "We are creating an unparalleled&nbs
     19 January 2017
  • Isstories
    Is stories
    Jabil Circuit, Inc.'s (JBL) witnessed a gain of 0.81% in recent trading period with closing price of $23.58. The company's last traded volume of 1.17 million shares ...
     18 January 2017
  • The Independent Republic
    Baxley Report Stocks To Look Out For: Jabil , Inc. (JBL), Extreme Networks, Inc. (EXTR)Jabil , Inc. (JBL) ended last trading session with a change of 0.81 percent. It trades at an average volume of 2.11M shares versus 1.17M shares record
     16 January 2017
    locked at 5% upper on IT project from US GSATrigyn locked at 5% upper on IT project from US GSA. Shares of Trigyn were locked at 5 percent upper at Rs 111.50 on Thursday after its subsidiary received IT contract from the independent ag
     12 January 2017
  • PCWorld
    gets upgrade after 35 yearsInside wearables, smart devices, robots, and computers like Raspberry Pi are communications buses called I2C (Inter Integrated ), which date back to 1982, and SPI (Serial Peripheral Interface), which was born in 1
     10 January 2017