I FINALLYgot 4 ATMega328s; 2 with bootloader OPTIBOOT ( UNO ).
That´s what the sticker ( label ) says.
Can I build this ( Standalone Assembly.hmt ) to upload sketches? With v0022?
Does the serial connector go directly to the COM port or do I still need an USB-Serial cable?
I suupose so because You can´t connect more than 5v to an TTL IC.
I got a cable which uses PL2303 IC. Didn´t work.
Strangely when I power the circuit the LED starts flashing, the frecuency goes higher
until the LED goes off and does nothing more, even after resetting.
I also found this circuit on the web.
I can get a MAX232 locally. I suppose I should connect pins 2, 3 and 5 to the COM port. Do I have to invert the signals?
Do I have to edit PREFERENCES, BOARD, PROGRAMMERS.txt? Should it work?
Please don´t tell me to buy an Arduino.
The UNO here costs Bs.550.00. Divide that by 4.3; that´s the price in $US. Thanks,