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 Entire forum ➜ Area Editor ➜ Suggestions ➜ Simplified PCB for hex uploader

Simplified PCB for hex uploader

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Posted by Kapil Saraswat   (1 post)  Bio
Date Tue 12 May 2020 07:04 PM (UTC)
Message
Thank you for sharing a nice circuit to upload the hex file to an AVR microcontroller through SD card. I designed a PCB and before uploading to GitHub, I would like to share you the circuit diagram. Can you spare a time to verify the circuit I an using?

Please follow the link for the schematic (https://github.com/kapil-iitk/AVR_SD_Programmer/blob/master/AVR_Prog.pdf). In the schematic, I am using resistor based voltage divider network for the 5V to 3.3 V conversion (for SD card to AVR interface). Can I remove the reset switch? Also, can I use internal oscillator (8MHz) so that I can remove the crystal oscillator?

Thank you for your time.
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Posted by Nick Gammon   Australia  (23,133 posts)  Bio   Forum Administrator
Date Reply #1 on Tue 12 May 2020 10:07 PM (UTC)
Message
Template:Arduino Please post Arduino-related questions to the Arduino Forum or to StackExchange: Arduino. This saves splitting questions and answers between this forum and the Arduino ones.

- Nick Gammon

www.gammon.com.au, www.mushclient.com
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