= CATkit board assembly =

 * Solder the small components first: this includes 
  * the output resistor network (R7,R8)
  * the reset resistor (R9)
  * the IC power supply decoupling capacitor (C1)
  * the reverse polarization protection diode (D1).

The resistors and capacitor are not polarized. The protection diode is. Looking at the diode's package, you can see a marker on one side. This marker has to align with the marker on the circuit board.


 * Solder the IC socket (optionally), or solder the IC directly to the board. 

Beware to align the IC correctly. An IC and IC socket contains a 'half moon' marker that needs to be aligned with the corresponding marker on the circuit board.

 * Connect a 6-pin header to the footprint marked as SERIAL.

Given the chip is programmed with a boot monitor, at this point the board should be functional, and can already be tested. The remaining steps are optional.


 * Solder the reset switch (S4).
 * Connect digital inputs or input switches to the remaining digital input ports (S1-S3)
 * Connect analog inputs or potentiometers to the analog input ports (R1-R5)
 * Connect the line-out mini jack to pin 4 and 5 of the PANEL port. 

For the port connectors: Pin 1 is indentified by a bar on the silk screen. Also, the hole of Pin 1 is square.

 * For standalone operation a BREAK resistor needs to be installed between the serial RX pin and ground, respectively Pin 4 and 1 of the SERIAL port. This resistor needs to be mounted on the solder side of the board. There are no holes provided.