VC Stereo Mixer ttt

 
 

 

IN STOCK

 

VC Stereo Mixer THAT 2180 based.

 

  • 4 stereo channels with voltage controlled level and panorama.
  • Voltage controlled sum out level.
  • Stereo level bar graph, 10 LEDs per channel.
  • Headphones out.
  • Mute buttons expander available http://l-1.su/Mute.html.
  • Audio signal flows only through VCA chips and summing amps (single opamp for left and for right), all controls through CV.

 

Power consumption: V+ 110mA, V- 93mA.

 

2 PCB - 2mm thickness, gold platted, black mask. $35 x 2 = $70

 

Two panels - 22HP front & back. Anodized alu, black print. $40

 

SMD parts + soldering. $15

 

13 tempco resistors $20

 

Standoffs, connectors.

 

Shipping per set: $5 - only boards, $10 - boards+panels.

 

TOTAL for complete set with shipping: $155

 

Skrill: info(at)greenexpo.by

Paypal: info(at)greenexpo.by

 

Assembled module $630 + $20 shipping.

 

MUFFWIGGLER forum thread http://www.muffwiggler.com/forum/viewtopic.php?t=82162

 

I decided to include standoffs in a complete set because US and EU have different metrics and sometimes difficult to find mm in Mouser. 10mm and 6mm, 4 of each.

 

 

Use a washer for 10mm standoffs:

 

 

 

 

 

Documents:

 

Partslist PCB1.

 

Partslist PCB2.

 

Trimming.

 

PCB1 top.

 

PCB1 bottom.

 

PCB2 top.

 

PCB2 bottom.

 

Front panel.

 

Back panel.

 

 

SHOPPING CARTS :

 

MOUSER SHOPPING CART. MERCHANDISE TOTAL: $130.56 (USD)

 

Parts not included in Mouser shopping carts:

 

- potentiometers
- knobs

 

Where to buy?

 

1. Thonk:
pots: http://www.thonk.co.uk/shop/alpha-9mm-pots/
knobs: http://www.thonk.co.uk/shop/synth-pointer-knobs/

 

2. Erthenvar:
pots: http://erthenvar.com/store/accessories/pots/9mm-vertical-pots

 

3. Smallbear:
pots: http://smallbear-electronics.mybigcommerce.com/alpha-single-gang-9mm-right-angle-pc-mount/
knobs: http://smallbear-electronics.mybigcommerce.com/synth-pointer-2-colors/

 

4. Tayda:
pots: http://www.taydaelectronics.com/potentiometer-variable-resistors/rotary-potentiometer/linear/50k-ohm-linear-taper-potentiometer-round-shaft-pcb-9mm.html

 

Jacks.

 

I included into Mouser shopping cart 8 Kobiconn jacks. But they need to solder a leg for ground connection.
Better choise is Inline jacks:

 

1. Thonk: http://www.thonk.co.uk/shop/thonkiconn-3-5mm-jack-sockets-x50/

 

2. Erthenvar: http://erthenvar.myshopify.com/products/3-5mm-inline-jacks

 

 

THAT chips on Etsy:

 

https://www.etsy.com/shop/RockmoreLabs?section_id=17400134

 

Warning!

 

Some cheap LEDs have bad legs isolation at the cap, and they may short to the panel. Check conductivity in a place where LED touch the panel before installing.

 

 

 

 

ASSEMBLY TRICKS

 

 

Kit:

 

 

 

 

Back:

 

 

Inside:

 

 

Scope shot: panorama modulated by triangle:

 

 

 

ASSEMBLY TRICKS

 

Erthenvar jacks are too high in comparison to Kobicon. Cut these legs with pliers. We need to achieve 10mm between board and panel.

 

 

Kobiconn jacks need ground leg soldering. I use cutted resistor legs.

 

 

These spikes on pots need to be cuted.

 

 

 

 

 

 
 

(c) 2012 L-1 Synhesizer. E-mail: info@greenexpo.by