Assembly Guide - will127534/Taiwanduino GitHub Wiki

Step 1 - Check the parts

Parts List：

NO	item	count	note
1.	Taiwanduino PCB	1
2.	Atmega328P IC	1
3.	25AA512 IC	1
4.	28PIN IC Socket	1
5.	8PIN IC Socket	1
6.	6PIN 2.54mm female header	1
7.	USB Mini-B DIP Connector	1
8.	Tact Switch	1
9.	LED	2	1xRed 1xYellow
10.	3.3V Zener Diode	2
11.	1N5819 Schottky Diode	1
12.	2N2222A NPN Transistor	1
13.	16MHz Crystal	1
14.	100μF 16V Electrolytic Cap	1
15.	22pF Ceramic Cap	2	marked 22
16.	0.1uF Ceramic Cap	3	marked 104
17.	10Ω Resistor	1
18.	10kΩ Resistor	1
19.	1.5kΩ Resistor	1
20.	68Ω Resistor	2
21.	220Ω Resistor	2
22.	1MΩ Resistor	7
23.	16Ω 1W Speaker	1	marked 16Ω 1W
24.	Potentiometer	1

Step 2 R14 Resistor & Crystal Resonator

The golden rule of soldering boards is solder from the lower parts to higher parts, so start with the lowest R14 & Crystal
Look the PCB markings for the parts location.

Step 3 LEDs & both IC Sockets

Be careful for the LED polarity, positive lead is marked with the "Plus" sign and the notched side of the IC socket needs to match to the notched mark on PCB.

Step 4 Zener Diodes

Bent the both zener diodes into 180 degree from the marked side.

**Be careful for the polarity **also, face the marked side inside.

Step 5 Ceramic Capacitors

solder all the ceramic capacitors.

Step 6 Resistors, Diode and Transistor

Bent all the other resistor like the picture below then solder.

Be careful for the polarity of diode and transistor, assemble it as the picture below.

Step 7 Potentiometer, Electrolytic Capacitor,Button and USB socket

Be careful for the polarity of the capacitor, solder the positive lead to the side marked with a "Plus" sign.

Step 8 MCU and Speaker

Assamble the Atmega328 MCU to 28 pin socket, make sure the notched-end side is inline with the same notched-end mark on the PCB. Also solder your speaker to JP3, note that it doesn't have polarity so solder it in the way you want :D.