Step 4: Capacitors, Transistors, Photocell
Insert and solder the capacitors, transistor, and photocell::
•
1uF x 1
•
10uF x 1
•
100uF x 1
•
0.1uF x 1
•
0.01uF x 2 (for "-C-", or use the socket. See note)
•
2N089 transistor
•
7805 voltage regulator
•
Photocell
Note:
For the 1uF, 10uF and 100uF caps, the long lead of the cap is
the positive, and it goes in the square hole.
Note
: the spots marked "-C-" are tweakable capacitors. Changing
their value will change the analogue filter.
The easiest thing to do is
to install a 0.01uF capacitor for each
. A more advanced approach is
to install two socket holes now and put in 0.01uF caps later. Then
you can swap the caps out for different filter sounds.
Step 5: Controls
Insert and solder the controls:
•
Buttons x 3
•
Rotary x 1
•
Trim-pot (100k) x 1
•
Red LED in the center of board (see note) x 1
•
Red LED x 1
•
Blue LED x 1
Note:
The long lead of the LED is the positive and it goes in the
square hole (red and blue LEDs only).
For the red LED in the center of the board: it should stick up enough
so that you can bend it over to shine it on the photocell. In the photo,
I put heat-shrink tubing on the leads. If you don't have that, you can
use electrical tape or paper/masking tape.... or nothing if you're
careful!
