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James Sleeman
Works at Gogo Internet Services Limited
Attended University of Canterbury
Lives in Christchurch
1,410 followers|26,405 views
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James Sleeman

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At 10:45 you feel the chip and it's "red hot", but the actual dissipation is less than 800mW going by the numbers (9.81v@1.1A in = 10.791W, 10W out).  

The back side of those boards is one big copper plane with lots of thermal vias under the tab of the IC,  it should be able to ditch that 800mW.  I think if you had let it stabilise you'd find that the temperature becomes not-unreasonable.
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+James Sleeman Thanks for your comment.
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James Sleeman

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Wipe it with acetone maybe might remove the paint easily.
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+James Sleeman Acetone might remove the whole thing! lol
I'd suggest try spirits instead. It's less likely to melt the plastic/wax
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James Sleeman

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James Sleeman

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I bought an even cheaper 3d printer kit from Aliexpress a few months ago, a wooden frame i3.  Actually, it works very well,I'm not fussy but I get results out of it that are great for my purposes.

As usual the manual deviated slightly from reality.  I also made a few modifications and wrote about them...

  http://sparks.gogo.co.nz/prusa-i3-from-rp3d-notes.html
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James Sleeman

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If you look up the specifications for your locale's coin currency you should be able to find the weight of each, and it's quite closely controlled.

I've used that to check my "precision" scales from ebay.


Here's the Royal Mint's coinage specifications:

http://www.royalmint.com/discover/uk-coins/coin-design-and-specifications
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Ask for change at a bank. Fresh out of the bank coins should be pretty much perfect.
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James Sleeman

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TIL that modern hard drive platters are (sometimes) sputter coated glass, never knew that, but makes sense.
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James Sleeman

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4056 will be charge controller (TP4056)
DW01 and the 8205 is protection (8205 is dual fet used for disconnecting the cell)

These are basically the go-to pairings for single cell lithium ion stuff out of China.
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James Sleeman

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It's a resonator, give away is first the size (pretty much no 16MHz crystals at that size) and no caps, 3 pin (well, pad) device.

You can get Pro-Minis with crystals instead of resonators (if you look hard enough), not sure about Nanos.
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+jusb1066 Yes resonators are considerably less accurate than crystals, but considerably more accurate than the internal RC oscillator. For the majority of purposes, a resonator will be just fine. For accurate time keeping you should just use an RTC module anyway.


Some more on the subject: http://jorisvr.nl/arduino_frequency.html
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In his circles
6 people
Have him in circles
1,410 people
Owen Bush's profile photo
Raul Duduia's profile photo
Auke Jager's profile photo
Michael Pauley's profile photo
David Yarnell's profile photo
Johnathan Tilley's profile photo
Vladislav Protasov's profile photo
Travis Shoemake's profile photo
Carlos Guerrero (Stangrunner)'s profile photo
Work
Occupation
Web Developer (PHP), Xinha Developer (Javascript), Web Hosting (Linux)
Employment
  • Gogo Internet Services Limited
    Director, 2002 - present
  • Innovative Media Limited
    Programmer, 2000 - 2002
Places
Map of the places this user has livedMap of the places this user has livedMap of the places this user has lived
Currently
Christchurch
Previously
Rangiora
Contact Information
Home
Email
Story
Tagline
Just this guy, you know.
Introduction
Live In: Christchurch New Zealand
Member Of: Panther Car Club (mine is a Panther Kallista)
Member Of: Canterbury Recreational Aircraft Club (Light Aircraft Flying)
My Company: www.gogo.co.nz (Programming, Web Hosting)
Developer Of: www.xinha.org (WYSIWYG Web Editor)
Developer Of: github.com/sleemanj/gogoTradeMe (TradeMe API PHP Binding)


Bragging rights
Still an alive motorcyclist despite numerous encounters with the road. Was a pilot for a while, now in hibernation pending time and money, expensive hobby..
Education
  • University of Canterbury
    Computer Science, 1996 - 1999
  • Hillmorton High School
  • Manning Intermediate
  • Spreydon School
Basic Information
Gender
Male
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