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Archive | August, 2012

New Product: Audio Amplifier (LM4889)

The Modern Device LM4889 audio amplifier breakout board uses one of National Semiconductor’s “Boomer” amps. It uses what in the industry is referred to as a “bridge-tied load”. This is an efficient system that increases the total amount of power available to the speaker.┬áIt also eliminates the need for an output capacitor (like in the LM386), which tends to be bulky and can limit the low-end response. It has a shutdown pin to put the chip to sleep – just in case you’re trying to build a super low-power microcontroller application, that spends most of its time sleeping.

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New Product: Blue Breadboard Pots

I’ve wanted to find a source for these “breadboard potentiometers” for a long time. There are lots of trim pots in the world, but finding one with leads long enough to work on a breadboard, and with a molded on knob, took a bit of searching.

I think these are about the same thing as a Bourns 3386P but with a molded on knob. Perfect for breadboard and perfboard prototypes, such as use with our wired breadboards).
Also perfect for including in projects that occasionally need adjusting, such as our Audio Amplifier.

Available in a range of values:

  • 500 ohms
  • 1k
  • 10k
  • 50k
  • 100k
  • 200k
  • 500k
  • 1M