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Topic: my own ft232rl circuit (Read 4 times) previous topic - next topic

miros


(all my designs with that chip have been self powered).


my design is working but it doesnt upload everytime. first upload error second too and third success. would you be so nice and send me your schematic, please?

CrossRoads

#6
Oct 05, 2012, 09:02 pm Last Edit: Oct 05, 2012, 09:06 pm by CrossRoads Reason: 1
@miros,
Download the Duemilanove schematic from the Hardware page and use the FT232 design there.
http://arduino.cc/en/Main/ArduinoBoardDuemilanove

Or this one even, same thing for just the FT232
http://arduino.cc/en/Main/MiniUSB
Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

CrossRoads

Do you also have 100nF cap between FT232 DTR and '328 reset? Do you have 10K reset pullup resistor to +5? Do you have a diode acros that resistor like current Uno's use (anode to reset, cathode to +5)?
Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

magagna

Quote
my design is working but it doesnt upload everytime. first upload error second too and third success.


When I first started working with the bare FT232 I had this problem too...

Quote
Do you have a diode acros that resistor like current Uno's use (anode to reset, cathode to +5)


...but I've never seen the problem since I added a diode.

So hopefully that will fix your problem as well.
http://en.wiktionary.org/wiki/magagna <-- My last name.  Pretty apt.

miros

thanks i will try and post results later.

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