Assembling the Dragon Rider 500 for use with the AVR Dragon

Step 4 Resistors and Capacitors

To install the axial (a lead coming out of two opposite sides of a component) components just bend their leads at 90 degree angles so they will fit in the through-holes on the printed circuit board.

1. Bend and insert the resistors for R1-R4.

• R1, R2, and R4 are in the basic parts package, R3 is in the advanced parts package
• Double, and triple check the resistor color codes to ensure they match the values printed on the PCB. Replacing these with correct components later will be a major hassle.

2. Bend and insert the axial capacitors for C2 and C5-C9.

• All of these axial capacitors are located in the basic parts kit.

3. Flip the board over and solder each component

• If you bent the leads at a 45 degree angle after inserting them in the board none should fall out (or move) when you flip the board over
• Make sure to double check that you soldered every one of the leads.

4. Clip off the excess using your diagonal cutters.

Caution: Installing R3 (and later U5) commits you to using the precision voltage reference provided in the advanced parts package for Analog to Digital conversions. This also precludes you from using the internal voltage reference for ADC. Read the Caution section of the Dragon Rider User's Manual if you are installing the precision reference. You can choose not to install the precision reference (and not install R3 as well), read the User's Guide and make your own decision regarding this.

Please Note
Do not install C1. It is not provided and is not necessary according to the ecros website which describes it as a "de-gliching" capacitor for the reset pin.

Comments

[phutton11]

Caution....My kit included a 10 ohm resistor for R4. I replaced it with a 100 ohm resistor from my parts box. Went through the docs to make sure I was right.

[wilkolunenburg]

The reset is never mentioned, but it is installed in this step. You can see it mounted on the board in the next step. I followed this Instructable last evening and I now have a fully functional Dragon Rider. Thanks a lot! Wilko

[barney_1]

I'm glad this was of use for you. Thanks for pointing out the reset button issue. I have added that to the instructable.