Hi, many thanks for your replies. Brilliant. The command link that worked was "avrdude -p t2313 -c avrisp -P COM18 -b19200 -D -Uflash:w:blink.hex:i. This means the connections to the ATtiny2313 are correct, the microprocessor itself and the capacitor are okay.
Then I tried to do the same using the Arduino IDE V 1.6.2 and the Blink example. I usedFile and Upload using Programmer option, be following error:
avrdude: Expected signature for ATmega328P is 1E 95 0F
Double check chip, or use -F to override this check.
Wrong microcontroller found. Did you select the right board from the Tools > Board menu?
How do I choose the target microprocessor in the IDE and say it is a ATtiny2313 and not a ATmega328P
Thansk,
Lawrence