Octasonic HC-SR04 Breakout Assembly Instructions

Use this diagram as a guide when soldering the components to the board. There are only two components that need to be oriented a certain way and those are the ATMEGA microcontroller (notch should be at the top) and the LED (flat side should be at the top).

The ATMEGA IC is pre-loaded with the firmware for the board.

Suggested order of soldering:

  • Crystal
  • Capacitors
  • Resistors (8 x 2.2k plus 1 x 330 ohm for the LED)
  • Headers
  • LED

Note that it is not essential to solder the 2x3 AVR header unless you want to burn new firmware onto the board.