Thonk MA VCA Instructions Manual Download Page 3

   

   

September 8

th

 2014 

www.thonk.co.uk 

Manhattan Analog 
VCA Module 

Eurorack DIY Kit 

Instructions 

Version 1.0 

 
VCA BUILD INSTRUCTIONS 

 

1.  
 
Start by emptying the 

whole  of  the  VCA 

bag

 into a bowl or container. This makes 

it  much  easier  to  pick  parts  as  you  need 
them  and  you’re  a  lot  less  likely  to  lose 
anything.

 

 

 
 

 

 

 
2. 
 
First  you  will  solder  the  three  0.1uF  SMT 
capacitors. 
 
When you remove the SMT parts from the 
white  plastic  packaging  I  highly  advise 
doing so inside a bowl or smooth box with 
some  soft  white  tissue  paper  inside. 
Carefully peel back the transparent plastic 
with  the  parts  angled  down  so  they  fall 
into  the  receptacle.  The  tissue  paper  will 
stop  them  bouncing  and  sliding.  If  the 
receptacle is big enough to fit the PCB in 
while  you  solder  even  better,  then  when 
you  move  the  part  to  the  PCB  for 
soldering you remove the chance of losing 
them. 
 
Soldering the type of SMT parts included 
with  this  kit  is  not  hard  if  you  have 

tweezers

.  You  have  no  tricky  multi  pin 

SMT  IC’s  or  anything  of  that  nature  to 
deal with in this kit. 
  
Good technique is important though. This 
video  is  a  great  introduction  to  the 
standard  way  of  soldering  SMT  resistors 
and caps by hand: 
 

http://youtu.be/PU7wLcuqc-I

 

 

 

 

 

 

 

Summary of Contents for MA VCA

Page 1: ...nk co uk It also assumes no previous knowledge of electronics To learn to solder try http youtu be I_NU2ruzyc4 and the Adafruit guide to excellent soldering http bit ly 1l77tF4 Watch and understand th...

Page 2: ...he same on both sides then stop Work out why from the soldering guides linked and don t continue until you are getting those results This isn t about perfectionism you are very likely to end up with a...

Page 3: ...white tissue paper inside Carefully peel back the transparent plastic with the parts angled down so they fall into the receptacle The tissue paper will stop them bouncing and sliding If the receptacle...

Page 4: ...rientation 4 Next solder the two 100R resistors into place as shown NOTE In some of the kits the 100R resistors are provided as two separate bags with 1 piece in each NOTE You should have nice shiny s...

Page 5: ...sion 1 0 6 Next solder the four 1K resistors into place as shown 7 Next solder the single 4 12K resistor into place as shown 8 Next solder the single 10K resistor into place as shown 9 Next solder the...

Page 6: ...and quickly you should achieve the nice shiny solder cones mentioned previously on both sides of the board without needing to apply heat for longer than 3 seconds per joint BLACK RING TEXT 12 Next tak...

Page 7: ...two Ferrite Beads into position as shown 14 Next solder the single blue 22pF capacitor into place as shown 15 Next solder the three 100n caps into place as shown 16 Next solder the 14 pin and 8 pin I...

Page 8: ...e 16 pin DIL socket in the positions shown to create a single line 8 pin socket as shown 18 Next solder your newly created 8 pin single line socket into place The other half of the socket can be kept...

Page 9: ...blue trimmers into position as shown 22 Solder the single 4 7uF SILMIC II electrolytic capacitor into position as shown NOTE DO NOT MISTAKENLY SOLDER ONE OF THE TWO 47uF NICHICON ELECTRO CAPS HERE NOT...

Page 10: ...entation is vital The longer lead on the part should be positioned in the square pad marked with the plus positive symbol 24 Solder the larger remaining electrolytic capacitor into position as shown N...

Page 11: ...DIY Kit Instructions Version 1 0 26 Open the yellow ESD packet and solder the 78L05 into position The rounded side of the component faces out towards the edge of the board 27 Remove the nut and washer...

Page 12: ...ay just want to tag one terminal on each pot with solder first so that the pots are all definitely flush with the PCB Then finish the other 2 joints on each pot Remove the panel again and put the wash...

Page 13: ...the ground pins are touching as shown 32 Take one of the resistor leads you saved earlier use pliers to bend into a crook shape and thread through the two touching jack ground pins Solder so there is...

Page 14: ...e in the panel Now there is a connection between 1 The ground pins on all 4 jacks 2 The bridging resistor lead 3 The wire to the ground pad on the PCB 35 Push the ground wire down between the four jac...

Page 15: ...o it is orange Trim the CV2 wire so it protrudes 1cm from the nearest vertical pin on the CV2 jack and solder 38 Now solder the wire from the OUT pad on the PCB to the vertical pin furthest from the P...

Page 16: ...is a box marked on the PCB at the point closest to the blue trimmer Align the notch on the THAT2180B chip The pins on the THAT2180B are quite long so take care to not bend them when pushing into the s...

Page 17: ...r diode limits the offset incoming CV sum to 5 14V so if you mash it up to the diode s break point you ll get a little bit of positive gain with it trimmed to unity at 5 00V If you like distortion I e...

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