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Last modified on 20 January 2012, at 19:36

Soldering 101

Revision as of 19:36, 20 January 2012 by Corecode (Talk | contribs) (Created page with "Category:Workshops == Intro to through-hole soldering == We will solder a blinking, customizable name tag. We will also discuss and explain the design and the theory of op...")

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Intro to through-hole soldering

We will solder a blinking, customizable name tag. We will also discuss and explain the design and the theory of operation.

Circuit

  • A discrete astable BJT multivibrator feeding into a johnson decade counter, which drives the LEDs directly.
  • The counter can serve up to 10 segments.
  • The LED matrix can partitioned partitioned arbitrarily column-wise: multiple columns can be grouped onto a single counter output.
  • each counter output has one series current limiting resistor
  • last (unused) counter output feeds back to reset
  • multivibrator speed can be adjusted with a pot
  • on/off switch?

Components