Free Modular

ALU

A multi-purpose utility module for performing various mathematical functions with voltage.

ALU (named for the arithmetic logic unit of a CPU) has two independent parts: a logic section capable of computing AND, OR, NOR, and XOR on two input gates, and an arithmetic section that can compute the sum, difference, maximum, and absolute value of two analog input signals.

Resources

• Manual
• Assembly instructions and BOM
• Interactive BOM: front panel, back panel
• Faceplate stencil SVG
• GERBER files:
  • Faceplate: JLCPCB, PCBway
  • Front panel: JLCPCB, PCBway
  • Back panel: JLCPCB, PCBway
• Source files
• Schematic

Details

DIY difficulty: Hard (many surface mount components, but not too small)
HP: 4
Power usage:

	Typical current	Maximum current
+5V	NC	-
+12V	<10mA	20mA
-12V	<10mA	20mA