PCB PCB Generated PCB preview BOM Necessary
Designator
Value
Part-No
Price / EUR
Count
Sum / EUR
R1
3.6 kΩ, 1206
R:
0.01
1
0.01
R2
2.7 kΩ, 1206
R:
0.01
1
0.01
R3, R4
68 Ω, 1%, 1206
CSD: 10-120068
0.01
2
0.02
R5..R19, R38..R40
3.6 kΩ, 1206
R:
0.01
18
0.18
R20..R31
100 Ω, 1206
R:
0.01
12
0.12
R32..R37
150 Ω, 1206
R:
0.01
6
0.06
B1..B3
0 Ω, 1206
R:
0.01
3
0.03
T1..T18
BC807-25, SOT23
R: BC 807-25 SMD
0.04
18
0.72
C1, C2, C3
100 nF, 16 V, 0603
R: X7R-G0603 100N
0.05
3
0.15
C4, C5
22 pF, 0603
R: NPO-G0603 22P
0.05
2
0.10
C6
10 uF, 10 V, 0805
R: X5R-G0805 10/16
0.07
1
0.07
C9
100 nF, 63 V, 1206
R: X7R-G1206 100N
0.05
1
0.05
D2, D3
3.6 V Zener Diode, MiniMELF
R: SMD ZF 3,6
0.05
2
0.10
X1
20 MHz
R: 20,0000-HC49U-S
0.18
1
0.18
ISP, ADC, PWR
12-pin break-away connector (from a 36-pin strip)
R: SL 1X36W 2,54
0.27
1
0.27
CONN_USB
USB B connector
R: USB BW
0.21
1
0.21
U1
ATmega88-20AU
R: ATMEGA 88-20 AU
2.95
1
2.95
LED1..LED6
RGB LED
?
0.30
6
1.80
24 Copper wires
40 cm copper wire cutoff
R: CUL 500/0,63
13.90
0.058
0.81
Sum
7.84
Version 1: USB Powered
Designator
Value
Part-No
Price / EUR
Count
Sum / EUR
L1
10 uH, 450 mA, 1210
CSD: 146-121R010
0.22
1
0.22
U2, C7, C8
Do not populate
0.00
0
0.00
Sum
0.22
Version 2: Externally powered
Designator
Value
Part-No
Price / EUR
Count
Sum / EUR
U2
LM1117-5.0
CSD: LM1117DT-5,0V
0.95
1
0.95
C7, C8
10 uF, 10 V, 0805
R: X5R-G0805 10/16
0.07
3
0.21
D1
1N4001, MELF
R: X7R-G1206 100N
0.04
1
0.04
L1
Do not populate
0.00
0
0.00
Sum
1.20
Option: Button
Designator
Value
Part-No
Price / EUR
Count
Sum / EUR
R41
3.6 kΩ, 1206
R:
0.01
1
0.01
BTN
Pushbutton
?
0.10
1
0.10
Sum
0.11
Tutorial Soldering Microcontroller and Basic Parts The first step in soldering this board is also the most difficult: Soldering the microcontroller. We are going to use the drag soldering technique. To do so, we first place the microcontroller on the board to get an idea of how it should be placed afterwards. Note the pin one mark which is a small dip in one corner of the IC. This is used to orient it correctly:
Now remove the microcontroller again, select one pad of the pcb and tin it:
