K011- XB4A v1.5 Build Instructions


Xino Basic for Atmel v1.5

 XB4A components including voltage regulators

XB4A Components including voltage regulator kit

This article assumes basic soldering skills.  If you have not soldered before, or are a bit rusty, please check out some of the excellent soldering tutorials available on YouTube and other websites.



Assembled XB4A kit


Depending on how you use your XB4A there are some options to bear in mind when building this kit.  The basic kit does not include the microprocessor, crystal & capacitors, ICSP headers or voltage regulators & capacitors.  At a minimum you will need a microprocessor (Atmel Atmega328P), crystal (16Mhz) and 2 capacitors (22pf).  The other components are optional.  If you plan on using ICSP headers, however, you will need to fit these before attaching the serial programming header, and this programming header must be attached on the underneath of the PCB.


Location of ICSP header

Start by soldering the chip socket, noting which way the orientation notch is, and the 5 pin serial programming header (unless using the ICSP header, in which case fit the programming header last of all).  Then work through the rest of the components, beginning with those closest to the board.  There is one 10k resistor marked brown, black, orange, gold and three 1k resistors marked brown, black, red, gold.  One of the 1k resistors will need to be fitted vertically, paying close attention to the marking on the board.  The resistors, crystal, 0.1uf and 22pf capacitors can be fitted in any orientation.  The LED needs to be orientated so the shorter leg is nearest the edge of the board.


If fitting the voltage regulator components take care to orientate the capacitors so the longer leg goes through the hole marked +.  The 5v regulator and 3v regulator (KY5050 and MCP1700 respectively) need to go in such that the domed sides are facing the oval solder pad.


Showing location and orientation of voltage regulator coponents



The 3 pin jumper header (and jumper) and ICSP header (if being used) should be fitted next, followed by the reset switch and Arduino stacking headers.  (Tip: push the stacking headers on to the underside of an Arduino shield when soldering to the PCB to ensure they are strait and lined up).



Lastly the microprocessor should be inserted in to the holder, noting the orientation notch.  Always observe antistatic handling guidelines when dealing with these.  Note that a brand new microprocessor will need its legs bending in slightly to fit the socket.


Important Note:

The ICSP header pinout on the Xino V1.5 are as follows;

1: Gnd
2: VCC
3: MISO (IC pin 18)
4: MOSI (IC pin 17)
5: RST
6: SCK (IC pin 19)

This is different to a standard ICSP pinout which is as follows;

1: MISO (IC pin 18)
2: VCC
3: SCK (IC pin 19)
4: MOSI (IC pin 17)
5: RST
6: Gnd