Hi,
I bough some atmega328P-PU to make a standalone arduino.
Uploaded the arduino ISP schetch to my uno, connect as explained in the tuturial page. Leds blinked for 30s or so and said burn complete.
Then i added a USB Serial CP2102 (http://www.ebay.com/itm/400565980256?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649) and connected tx to rx, rx to tx, DTR to reset, 5v to 5v and gnd to gnd.
When i try to upload i get
avrdude: stk500_getsync(): not in sync: resp=0x00
Whats going on?
Thanks.
All afternoon in this, create a topic, try the button manual reset method again and works
But still would like to know how to make the autoreset...
Are you using a series 0.1ufd cap between the CP2102 DTR signal and your standalone 328 reset pin?
I tried that also, placed a ceramic capacitor number "104" believe its the right one?
DTR -> CERAMIC -> RESET PIN
It's correct. Do you also have a 10k ohm pull-up resistor on the reset pin?
I also had the 10k resistor there, i then also tried without it... but probably if i try it later today it will work as did the manual reset button
You have indeed quoted the correct USB to TTL converter as against the botched ones. (You did buy exactly that one, right?)
Just check - the 104 ceramic from DTR to the reset pin on the atmega328 is the only capacitor connected to it.
As you have not cited which "tutorial" you are using, I don't know whether it spuriously told you to add some extra "bodgie" capacitor to ground which entirely defeats the auto-reset function.
Yes i bought the exact one i linked.
It didn't work with the ceramic capacitor but i will try again when i can, was to try it yesterday but didn't have time.
Got it to work. Thanks.
Connected the ceramic capacitor 104 between DTR and the reset pin.
Also a 10k resistor between reset pin and 5v.