Assembling the Dragon Rider 500 for use with the AVR Dragon

Step 10 Finish the rest of the add-on kits.

Now we're in the home stretch. All other components can be added in the most convenient order. Here's how I did it:

1. Start by adding all of the passive components (resistors and capacitors) for all remaining kits.

• 1 resistor and 1 capacitor from the PSU kit
• 4 axial capacitors and one radial capacitor for the Serial kit
• 12 resistors for the LED kit
• 10 resistors for the button kit
• 2 resistors for the LCD kit

2. Add SW2 from basic parts kit.

• This switch from the basic parts kit toggles the power from the AVR Dragon to the Dragon Rider

3. Subregulator

• There is a sub-regulator included in the advanced parts kit in case you want to power the Dragon Rider with the AVR Dragon, but want the circuit to run at 3.3 volts. I want my circuits running at 5 volts so I instead just used a small length of wire to connect pins 1 and 2 of U6 together. See the photo below. I used a small U of wire so it would be quite easy to remove at a later time if I so desire.
• For more information about the subregulator please ready the Dragon Rider User's Manual at the Ecros Tech website.

4. Precision Voltage Reference

• There is a precision voltage reference included with the advanced parts kit. Install this in the appropriate location now (picture below).
• You have the option of leaving this component off and using the internal voltage reference of the AVR chip (you would also leave out R3 if you go this route). Read more in the User's Manual.

In the next few steps we will complete the Add-on kits.

Comments

[dav1dr4y]

I think it would  be good to put a diode in the sub. regulator spot instead of a wire. This is discussed in the Ecros User's Guide. Then you don't have to worry about frying the dragon it you forget and turn on both S1 and S2. I plan to go back and do that.