Addon H-MCU – Microcontroller addon for H-DAC

• Provides microcontroller interface to H-DAC jumper-link pinheader
• Can be made Arduino-compatible with external USB-serial interface board

Addon H-MCU is designed to help use H-DAC in projects where I use microcontroller for selecting input and filter settings. It makes it possible to switch input and DAC filter with external remote signals.

Design and schematics

This is just a simple microcontroller circuit connected to H-DAC jumper link pinheader. It takes voltage supplies from H-DAC as well. The circuit can be made Arduino-compatible by loading a bootloader. However, care must be taken with voltage levels as this is a 3.3 V circuit unlike many Arduino circuits. I have used this only with my own C program developed in Atmel Studio.

There are LEDs to indicate status of control lines.

Layout

Small pinheader socket on bottom side is only for mechanical support.

Files

v1.0A PDF files

• Schematics
• Component placement top
• Component placement bottom

Version history

Schematics/PCB, changes for next version

• v1.0A Initial version
  • Update silkscreen with new symbols (already done in component placement)

This page

• 18.2.2017