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March 28, 2015
News - Getting into Arduino as a…
about a month ago
“Learning Arduino as a skill could be just that, or finding out what all the hype is about, or even picking up a skill for future employment opportunities”
When we were interviewing techs, never asked about arduino, but did ask about microprocessor troubleshooting experience. While those having ardy as their sole embedded systems experience were worthy of consideration, but the nod went to two people whom knew about ‘real’ tool chains.
That said, am aware of commercial-grade stuff that has used the ardy system, but these tend to be based on the better hardware and libs such as PJRC and their Teensy stuff.
News - SparkFun Gives Day Starts…
about 6 months ago
Have to love a company such as SFE where the management metaphorically puts on the work boots every morning and builds something they believe in; but as much as SFE is loved and respected, will have to disagree on this.
The EFF has been the recipient of millions USD annually, with no tangible results other than public awareness of some important issues. There are two big tech issues of our time: net neutrality and encryption/privacy. And other than the EFF’s frequent amicus curiae briefs for high-profile stuff, am not certain that much has trended away from the Dark Side.
EFF principles are mostly lawyers, and are located in Silicon Valley and in the beltway. This is called ‘living in a bubble’.
Until last year, donated $100 pr annum for 13 years to the EFF. My EFF support ended with their lionization of Chelsea Manning. Hence, this year, all of my donation money will go to the FSF.
Suggest the Free Software Foundation and Software Freedom Law Center. Do not care that Stallman is an eccentric crank, as he is not disingenuous and is interested in fighting the good fight to the bitter (and bitten) end.
News - Wedginursday: Frame Rates…
about 7 months ago
AP102 is, mechanically, a good choice for POV stuff, but disagree with the frequent and intentional misinformation on the common venues such as SF, Adafruit, Hackaday, etc. Mostly because the Teensy WS1812 drivers are non-blocking, and code support for AP102 can be poor. And the Teensy 3.5 might be an easier solution per the 5V compatibility.
The AP102 will have ‘clock recovery’ problems for large projects. Have had many problems with the generic alibaba stuff, whereas the WS1812 common Chinese stuff just works.
All of this has been discussed, in detail, for several years and on several threads on the PJRC forum.
News - Introducing GetSparked
about 8 months ago
Let us see if understood. GroupGet gets 10-20% cut, no one gets billed until it ships, and the project/manufacturer gets remitted after all funds have been received and shipments are complete. Noted that risk is mitigated for the backer, but other than parts and labor, is there any other up-front level of risk to the manufacturer? Is the project required to expose all IP?
about 10 months ago
The quickie hack could play with the shunt resistor and feedback resistor values. But you would have to mentally scale the display.
Read the data sheet for the MOSFET to determine SOA for DC; and calculate Tj for your particular VA.
Things that can be done to enable increased load power
- use a bergquist (SP900 or similar) ‘thermal transfer’ insulator pad in lieu of the heatsink goop.
- airflow directly on the heatsink (at least 15 CFM)
- CV vs CC modes (depends on the compliance V)
Per the schematic, DC only.
News - Arduino Comparison Guide
For Teensy 3.5 and 3.6, you need to add the on-board SD feature, and that models 3.2 and 3.5 have 5V tolerant digital I/O.
There are also some really nice google spreadsheets for this stuff.
News - When Open Source Goes Clo…
about a year ago
A little bit of trolling (on my part) here. Per my inalienable right to make rash generalizations, have found that the most creative and open makers tend to be formally-trained STEM types. Those that tend to less open and are more likely subject to emit corporate hyperbole are the artistics, accountants, sales, and managers. The most blazing bright examples of open makers are those such as Limor Fried and Nathan Seidle. An example of a more pragmatic and measured approach to ‘openness’ would be Paul Stoffregen.
There are those makers that are skilled crafts people and engineers. And there are those makers that only (metaphorically) build leggo structures from kit instructions. The latter is not ‘wrong’, but are simply subject to their personal limitations, which includes Bre Petis.
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