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HP 20b Hacker's Kit US$5 No longer available for purchase.

This is a "hacker's kit" for the HP 20b calculator. If you are interested in hacking the 20b to do things other than it was intended, and you are very comfortable with soldering, this kit is useful.

No instructions or any other kind of support is provided with this kit. If you do not understand what the list of contents below means, or if you don't feel like you can figure things out on your own, do not buy this. I only provide this because it is otherwise much more expensive to buy the individual components separately.

Note that some of these components are VERY tiny, so you must have good experience with surface-mount soldering and a quality soldering iron for anything here to be useful.

Contents

• 18 pF 0603 capacitors (quantity 2)
• 100 ohm 0603 resistor (quantity 1)
• Zero ohm 0603 resistors (quantity 2)
• PNP SOT-23 transistor (quantity 1)
• 32.768 kHz clock crystal (quantity 1)
• MAX3232 TSSOP level shifter (quantity 1)
• 16-pin header for JTAG (quantity 1)