As promised here's the follow up video to the Synovatron DIY kit post.
I used the kit to make a simple polarizing CV mixer. To make this all you need is the Synovatron kit, seven 100k resistors, a dual opamp (tl072/tl082/lm358 etc) and an spst switch.
The inputs are unbuffered but you could simply add a couple more opamps to buffer them if you wish.
click the picture to download a PDF of the schematic.
Buy Synovatron DIY Kits on ebay
Visit the Synovatron blog
Ok so this is the last post of the year, hope you have a great 2011
Cheers
Paul
Great post and video, very informative again.
ReplyDeleteI might try one of those kits next year, excellent for beginners like me i guess.
I hope you'll have a great 2011 too!
cheers Pierre, keep on modulating!
ReplyDeleteI think Paul's CV mixer is an ideal first project, it's very straightforward, not much to go wrong and can be 'pimped' with extras like DC Vref on normaled inputs and +/- level output indicator LEDS with just a few extra components PLUS it's really a very effective module. Buffering the inputs will not do much except give a constant input impedance but this design only varies between 100k and 112.5k anyway so keep it this simple. Great job Paul.
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