Heavenly Red v1.0
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5
Power section
IC1
can be either a LT1054 or a (cheaper) ICL7660S.
I do not advise the use of a battery in this build as the charge pumps will do strange things when the
battery is depleted. This is why it is also left out in the off board wiring section.
If you want to leave out the Variac switch, you will need to do the following.
Hardwire to 18V
If you connect
pads 2 to pad 3
with a jumper on
SW1
, you will feed the effect with 18V.
Pads are marked like this:
9V only
For this you can leave out
C5, D4, D5, IC1
. Add a jumper between
pad 1 and 2
on
SW1
Output buffer
I added a simple optional buffer (as designed by AMZ) in case you need it. I suggest you do not add it
until you are in need of one, eg. when the pedal does not play nice with the other effects. To leave
out the buffer, leave out
Q6, C28, C29, C30, R26, R27, R28, R29
. Solder a jumper between the
bottom 2 pins on SW8. You can easily remove it if you decide to add the buffer.
Build sequence
Before starting with this section, make sure you have read the modifications section first!
Soldering this board can be very complicated for some people since the solder pads are very close
together. Use a magnifying glass to make the job easier.
The trick to soldering a PCB is to work from small to big components. My building sequence
suggestions in this section are based on the parts I used myself. Sometimes some components are
smaller (or bigger) so always use your own common sense and change the order accordingly. Usually
capacitors can differ a lot in size depending on their rating and value.
Note:
Do not blow on your solder in an attempt to cool it down. That can result in a bad join that
might corrode! Also take extra care not to short components.
Start by soldering the resistors and jumpers (if applicable). If needed you can create a jumper using a
spare piece of lead from a resistor or diode. Next come the diodes (not the LEDs).
If you want to experiment with other transistors then you could socket them instead of soldering
them to the board. Y
ou’ll need a
some 20 SIL sockets, break off the sockets and solder them to the
board. Now is the time to solder these sockets on the PCB as well as the socket for the IC. Place the
transistors and IC once you are finished with all soldering and off board wiring!
3
2
1
