What parts do you stock, and how do you store them?
In this workshop video we cover:
- The common parts we stock and try to use in every design
- Substitutions and shortcuts we take when building a prototype
- How we store our parts
Sources for most of the parts in the video are available on our master partlist.
Continue below for a short summary of the parts.
0603/0805 Resistors. 2K and 10K in reels of 4000.
0603/0805 Capacitors. 18 or 27pF, 0.1uF, and 1.0uF in reels of 4000.
A case/Kemet A/1206 Tantalum. Bulk buys of 1000+, though we try to avoid them now in favor of 10uF ceramic capacitors. Tantalum is a conflict mineral, and that gives us a sad.
SOD-323 Diode. 500+, or a full reel. This is a general purpose diode, we use BAS16J which is good for around 100mA. Need more current? For switch mode power supplies and similar we reach for a 1A+ Scotty diode.
NPN transistor SOT-23-BEC. 500+, or a full reel. We’re stocking BC818 lately, good to 100mA or so. BEC is our preferred pinpoint. Just remember “boys eat cheese”, or substitute your own!
LEDs 0805. We stick with 0805 LEDs because 0603 is down right tiny. LEDs are expensive so we only buy them by the 100 or 500s.
HC-49/US SMD crystal. The cheapest. We use this package whenever possible. 12, 16, and 20MHz are in the chest of drawers. A dozen other frequencies are on hand for odd uses (25MHz for ENC28J60 Ethernet transceiver).
4x6mm SMD crystal. More expensive than HC-49/U. We use sparingly when space is at a premium. 12MHz and 8MHz are the values we usually have available.
SOT-23-5 voltage regulator, with enable switch. Usually 150mA. We buy 100+ of 3.3volts and 5volts, but stock a range with 1.2volt, 2.5volt, and adjustable regulators in this package.
SOT-223 voltage regulator. Usually provides 800mA. We buy 100+ of 3.3volt and 5volt. These are handy when 150mA isn’t enough.
0603/0805 ferrite bead. 1A+ rating. We buy 100+, though you can leave it out of most prototypes.
5.2mm SMD (or 4.8mm) button. A pick and place friendly button. We buy them 500+ at a time for the best price break.
01×40 0.1″ (2.54mm) male straight/right angle pin header. Great replacement for shrouded headers you can’t source quickly. Buy big bulk bundles on eBay for cheap.