I2C expander with MCP23017

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2 layer board of 1.90x0.95 inches (48.23x24.21 mm).
Shared on August 30th, 2014 14:24.

Use I2C to drive 16x2 LCD, optional RGB backlight, PWM. Uses SOIC chips for small footprint. All circuit and layout by J Echavarria.

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Dual voltage-controlled audio amplifier

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2 layer board of 1.93x1.29 inches (48.90x32.69 mm).
Shared on August 30th, 2014 00:58.

Uses THAT2180 VCAs

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2 layer board of 1.30x0.99 inches (33.02x25.07 mm).
Shared on August 30th, 2014 00:47.

Using x4001 quad NOR gate. Supply voltage up to 18V possible with CD4001BEE4. Open collector outputs.

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2 layer board of 0.25x0.59 inches (6.40x15.04 mm).
Shared on August 29th, 2014 22:07.

Miniaturized Breakout for the BNO055

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2 layer board of 2.02x2.02 inches (51.21x51.21 mm).
Shared on August 29th, 2014 21:08.

OMSI - letter

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