Pedal De Delay

Dos Ochenta Compressor
Rev.4.Jan.17.2005

Build the DOD 280 compressor on this layout. An LED/LDR can be used instead of the VTL5C2.
Millennium 1 added to the circuit board,if it is not desired, just leave those parts out. Off board
components except for the potentiometers are not shown on the layout. Trademarks are propery of
their owners.
500k-B100k-A
LED

1½
SENS
0.05
22k
1M

+9V
4k7
0.05
D1

22k
1M

GND
IN

LEVEL

1

OUT
CNTRL

22k

22k
100k

220k
+

10uF

0.05
Q2
4k7
Q1
0.05MOC.DAPENOT.WWW

½

47uF

100k

3002 PF
IC 1

+

0.01
10k
470k

G

PMOC 082

220k

0

LAYOUT
0

½

1

1½

2

READY TO TRANSFER

DPDTINPUT JACK
TIP

OUTPUT JACK
TIP
OUTPUT JACK
SHIELD

Parts List
Resistors
Capacitors
1 - 4k7 (4.7k)
1 - 0.01µF
1 - 10k
4 - 0.05µF
3 - 22k
1 - 10µF
2 - 100k
1 - 47µF
2- 220k
Transistors &ICs
1 - 470k
IC1 - LM358
2 - 1M
Q1, Q2 - NP4124 (use 2N3904)
1 - VTL5C2 (or LED/LDR)

Layout and presentation by Francisco Peña 2001-2005®.
All rightsreserved. Authorization for personal use only,
any commercial use is forbidden.
Permission for posting/serving limited to
http://www.tonepad.com
Permission refused for postingfrom other sites.

INPUT JACK
SHIELD

Pots
1 - 500k
1 - 100k Log
Millennium
1 - 1N914 diode
1 - FET (2N5485 or similar)
1 - 2k2 (2.2k resistor)
1 - 4k7 (4.7k resistor)1 - LED

Schematic
1N914
22k

AC
ADAPTOR

2N5485
Vb

+
9v

10uF

22k

Vb

2k2

470k

INPUT

0.01

10k

3

8
IC1a

LED

1

4k7

2
+9V500k

0.05

1M
100k
LDR

LED

0.05

0.05

6
IC1b

1M

22k

4k7

100k

Vb

5

4

7

100k

0.05
Q1
220k

47uF

Q2
220k

OUTPUT