Frequency Central Infinitely Maybe, Создание документации, Страница: 2 / 5

Key to PCB screen print:
n:
This signifies NPN BC547 transistors. Note the correct pinout as shown by the half circles.
p: This signifies PNP BC557 transistors. Note the correct pinout as shown by the half circles.
f: This signifies 2N5485 FETs. Note the correct pinout as shown by the half circles.
The PCB shows the correct orientation for BC547/BC557/2N5485. Other transistor types can
be used (eg 2N3904/2N3906), but please observe the correct pinout.
Please observe the correct polarity of the electrolytic capacitors.
Bill of Materials
10R x 1
1K x 4
2K2 x 2
4K7 x 3
6K8 x 1
10K x 9
22K x 3
33K x 1
47K x 5
100K x 16
150K x 1
330K x 2
680K x 1
1M x 2
1M5 x 2
All resistors ¼ watt
metal film
22pF x 2
100pF x 1
2n2 x 1
10nF x 1
22nF x 1
33nF x 1
100nF x 1
1uF x 2
22uF x 4
47uF x 2
TL072 x 4
BC547 x 7
BC557 x 1
2N5485 x 2
1N4148 x 6
8 pin socket x 2
3mm red LED x 3
A100K x 1
(or these) *
B100K x 2
(or these) *
A100K **
C1M x 1
10K trimmer x 1 ***
3.5mm socket x 9
Male 40 pin header
Female 40 pin
header
power header (cut
to size)
Big knob
Little knob
* I prefer the Song Huei tall trimmers because they have a longer shaft and a white notch.
** This is for the Maybe pot, it
’ s marked as B100K on the PCB, but please use A100K.
** See below, although there are two trimmers marked on the PCB, we ’ re only using one.