Hey I just constructed a circuit where I solder a 28 pins socket and one 16MHz crystal for the circuit. I put a pull up resistor at the pin 1 too. Weird things happen is that my program sometimes work sometimes not working. Sometimes it loop for once .. Any problem ? Is it because I did not insert 2 cap at the crystal side ?
So, the minimum circuit for an arduino based development board is a 16MHz crystal and the 100nF cap for power supply and pull up resistor for RESET pin ?
Vincent19:
So, the minimum circuit for an arduino based development board is a 16MHz crystal and the 100nF cap for power supply and pull up resistor for RESET pin ?
No, you can use the internal oscilator (there is a fuse). And the reset is not required. The minimum is just the cap for the supply
Vincent19:
So, the minimum circuit for an arduino based development board is a 16MHz crystal and the 100nF cap for power supply and pull up resistor for RESET pin ?
No, you can use the internal oscilator (there is a fuse). And the reset is not required. The minimum is just the cap for the supply
[/quoteWhy the reset is not required ? Thought it needs to be pulled high for normal operation ?]
Vincent19:
The minimum is just the cap for power supply ? Then how can I use the internal oscillator ? What setting should I change ?
For avoiding the crystal, you should program the atmega as 8Mhz internal oscilator. Select arduino pro mino 8Mhz in arduino IDE as target board in order to obtain the right times.
Vincent19:
So, the minimum circuit for an arduino based development board is a 16MHz crystal and the 100nF cap for power supply and pull up resistor for RESET pin ?
No, you can use the internal oscilator (there is a fuse). And the reset is not required. The minimum is just the cap for the supply
Why reset is not required ? I thought RESET should be pulled up for normal usage ?