SparkFun will be closed on Monday for Memorial Day (5/27). Orders placed after 2pm MT on Friday (5/24) will process and ship out on Tuesday (5/28).


Member Since: September 3, 2013

Country: United States

  • We have some counting scales here in the warehouse. They're really nice when packing or inventorying bulk components, IIRC ours have the option to calibrate on 10, 25, 50, or 100 components. The manufacturing tolerance of the parts plays a big part in accuracy. For things like metal screws and nuts it's really great, but plastic standoffs and LEDs have a surprising amount of weight variation - when I used to do it we would overcount by 1-2 to guarantee at least as many pieces as we listed.

  • Short answer: it looks like the ┬ÁC is built for low power operation, and has some nice RTC features.

    Long answer: page 547 of the publicly available datasheet (PDF) for the Apollo3 Blue says:

    12.3.1 RTC Functional Overview

    The Real Time Clock (RTC) Module, shown in Figure 65, provides an accurate real time measurement.

    Key features are:

    • 100th of a second resolution

    • Time is measured for the years between 1900 and 2199

    • Automatic leap year calculation

    • Hours may be specified in 12 or 24 hour mode

    • Alarm precise to 1/100 second

    • Alarm interval every 100th second, 10th second, second, minute, hour, day, week, month or year.

    • 100 Hz input clock taken from either the high accuracy XT Oscillator or the low power LFRC Oscillator.

  • The pros and cons of working here - since we can run over to the front desk to pick up orders, there's no need for a red box to ship them. I've definitely got a good collection of heavy duty plastic zip bags at home though.

  • If there was no sustained arc with 5v... how would those supplies hold up to being placed in series?

  • One example of assembly in Arduino/C that I've seen (and is used quite often) is the Neopixel library for WS2812 addressable LEDs. With its timing based protocol and predictable clock speeds on AVR boards, it brute forces timing by actually including "nop" (No OPeration) commands to take an exact number of clock ticks between commands. The downside is definitely a lack of portability, the library is pretty sizable since there is different assembly code for different processors and even differing clock speeds.

  • Alice in Wonderland did some odd seeding. I found "the" in 5 doubles, 2 triples, and a quintuple on your example. I'm curious how that happened- a bug in the generation code, strange text in the source, or what. A quick drop in on the html version on gutenberg.org didn't pop up with even a single instance of double "the".

  • "BachPCB" sounds like a good name for an embedded board built by these folks.

  • That looks like some sort of flux removal- water, rubbing alcohol, or possibly some specialized formula. Electronics solder wire (including the one we sell and use in production) will often have a flux core to allow better wetting and flow when you solder your parts in. The residue left after soldering is often a little sticky, slightly conductive, and may eventually corrode your board. It's a good idea to clean the board when you are done, just make sure you let the board dry completely before connecting it to power.

  • Looking back, it seems that the crowdfunding campaign delivered exactly what they promised. Too bad there was a lot of small print.

  • Dual SIM phones are actually amazingly popular in many countries. It allows for people to have a single phone for work/business and personal use, or to have separate plans from different carriers for data/texting/voice/etc.

    As far as the function, it should just be controlled through the software side of things, which SIM module connections go though. Pretty cool stuff, and it's starting to gain a little traction in the US now too.