Electronics Room

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The gray and gray/yellow drawers on the back wall are the electronics store. These components are for sale to anyone who has a use for them. Place payment in the drawer labeled with bold dollar signs and the word "payment" near the lower right.

If you don't know what a component costs, find it on http://mouser.com/ and add 10% to cover shipping. If you need change, you can make it with funds from the soda payment cup in the fridge. However, these funds go to different people, so don't just drop money in the wrong cup.

Some members may have components or salvageable parts that they will share but which may not be part of the electronics store. Use your judgment when taking those things.

If you wish to donate components to the store, feel free to do so. If it is clear where they should belong, just drop them in. Avoid placing them in an unlabeled drawer or bin. If you don't know where something belongs, ask Nate B, or leave a note indicating your intent and he will find or make a place so the parts can remain organized.


As with all of i3, leave nothing on the workbenches. The only thing permissible to leave on a workbench is the Edsyn soldering station and the tip cleaner. Your project can be stored in a labeled box in the electronics room if you are actively working on it and it is small. Otherwise, take it home or use a larger member storage area in the shop area.

If you were trimming or stripping wires, consider sweeping before you leave.


Parts on this list will be ordered ASAP.

Who wants it? What is it? Quantity desired Mouser part # Digi-key part # notes
nbezanson CR2032 SMT battery holder 5 712-BAT-HLD-001 BHX1-2032-SM-ND for firefly kits
nbezanson SOIC-8 test socket 2 517-208-7391-55 lazy probably skip this and DIY
nbezanson 40x1 gold-plated pins, 0.100" 25 649-68602-220HLF lazy
nbezanson 36x2 tin-plated, cheap 50 517-929836-02-01-RK cut down for other sizes
Devin 3.3v LDOs, through-hole 10? >150mA?
packrat 68uF 400V Radial Cap 2-3 none P6137-ND


Parts on this list have been ordered and should be in-stock. Add rows if you contribute stuff, edit if things go out of stock.

Part number Description out?
NE555 Generic timer IC
NE556 Dual timer
LM324 Quad op-amp
LM339 Quad comparator
MAX7219 8-digit 7-segment display driver, or 64-LED matrix driver
74HC244 Octal buffer/line driver
74HC245 Octal 3-state bus transceiver
74HC04 Hex inverter
74HC138 3-to-8 decoder
74HC164 Serial-in, parallel-out shift register
74HC165 Parallel-in, serial-out shift register
IRLZI24N N-channel power MOSFET, 55V 14A TO220
LM1117 3.3v 1A LDO SMT
2n7000 N-channel MOSFET, 60V 0.2A TO-92
BC547 NPN general-purpose BJT
BC557 PNP general-purpose BJT
72v 900mA Polyfuse/PolySwitch resettable fuse