ISP Shield 2 Assembly Instructions

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This page walks through the basic assembly process for building the ISP Shield 2.0.

Bill of Materials, or, "What's in the kit?"

Line Ref Des Description Type Vendor Vendor Part Number Quantity
1 n/a PCB for ISP Shield 2.0 Printed circuit board Evil Mad Science 681 1
2 R1 Reset line pull-up resistor 10k, 1/6 W Digikey 10KETR-ND 1
3 R2 thru R6 Reset and LED load resistors 1000 ohm, 1/4 W Digikey 1.0KQBK-ND 5
4 R7 Auto-reset overrride resistor 100 ohm, 1/4 W Digikey 100QBK-ND 1
5 J5, J6 Target Power Enable, Auto-Reset Overrride (Header) 6 pin right-angle header, 0.1” spacing Digikey SAM1043-06-ND 1
6 PROG, ERROR, PULSE, HELLO Indicator LED 3mm, Diffused Yellow Evil Mad Science 357 4
7 XTL Crystal 16 MHz Digikey XC1721-ND 1
8 C2, C3 Capacitors for crystal 18pF, 50 V ceramic Digikey BC1004CT-ND 2
9 C1 Bypass Capacitor 0.1uF Capacitor Digikey BC1148TR-ND 1
10 S1 Reset Switch Tactile pushbutton switch Digikey 679-2452-ND 1
11 ISP6 6 pin ISP Header 2x3 pin 0.1” spaced DIL header Digikey 609-3202-ND 1
12 J1 thru J4 Header set, 6-pin (2 pcs), 8-pin (2 pcs) Stacking type header, 0.1” spacing Evil Mad Science 633 1
13 U1 ZIF DIP Socket 28 pin, 0.3" pin spacing Evil Mad Science 212 1
14 J5, J6 (jumper) Target Power Enable, Auto-Reset Override (Jumper) 2 pin jumper block, 0.1” spacing Digikey A26242-ND 2

Assembly procedure

We'll go line by line through the kit components. This guide assumes that you have had some soldering experience. If not, or it's been a while, you may also want to look at pages 2 and 5-7 of the Bulbdial clock assembly instructions, which go over basic tools and technique. And, if you really are a beginner, there are plenty of good tutorials on line, like this one.

(Assembly instructions will be posted by June 1, 2011. Not yet!)

1. The circuit board

Here's what the bare circuit board looks like:


We'll be adding components to the labeled locations there.

2. The 10k ohm pull-up resistor and 100 ohm auto-reset override resistor

The 10,000 ohm pull-up resistor is the smallest resistor in the kit. It has a color pattern of brown-black-orange-gold. Install it in location R1, solder both pins, and clip the excess leads short.

The 100 ohm auto-reset override resistor has a color pattern of brown-black-brown-gold. Install it in location R7, solder both pins, and clip the excess leads short.

These resistors may be orientated either way; resistors are not directional.


3. The 1k ohm resistors

There are five 1,000 ohm resistors. They have a color pattern of brown-black-red-gold.

These go into locations R2, R3, R4, R5, and R6.

Like the resistors above, these may be orientated either way.


4. The six pin right angle header

This six-pin header covers the two three-pin function select jumpers.

The angled end of the header drops into the line of holes at location J5 and J6 as shown:


Carefully tack down one pin on the top of the board:


Make sure the long pins on the header are parallel with the board and that the header is fully seated on the board (the black plastic block should be resting on the board).

If this isn't the case, carefully reheat the soldered joint and adjust the header as needed.

Once the header is lined up flip the board over and solder all the pins, starting with the pin farthest from the first pin your soldered.


Your board should look like this now:


5. LEDs

There are four LEDs to install.


Don't worry about mixing them up, they are all the same color. The LEDs go in locations labeled PULSE, PROG, HELLO, and ERROR.


Note that the orientation of the LED matters! The long lead on the LED is the positive (or anode) pin. The long pin goes in the hole with the square solder pad, like so:


Simply drop each LED in, bend the leads, solder, and clip off the excess.

Do this four times and your board should look like this:


6. Crystal and Capacitors

The crystal is the elongated silver can, and goes in location XTL. The orientation doesn't matter.


The related capacitors go in locations C2 and C3, on either side of the crystal. The orientation of these doesn't matter either.

Note the black stripe along the top of each capacitor! Make sure you're using the right ones.


7. Capacitor and Switch

There is one more capacitor, at location C1. It will look a lot like the capacitors at location C2 and C3 but will not have a black stripe.

The reset switch goes in location RESET.