[sdiy] Analogue hardware simulations in LTspice

Tom Wiltshire tom at electricdruid.net
Thu Oct 3 15:33:09 CEST 2019


Excellent Richie, thanks!

Those look like fun to play with, and I’ll probably learn a few new LTSpice tricks too.

Tom
 
==================
       Electric Druid
Synth & Stompbox DIY
==================

> On 3 Oct 2019, at 14:20, Richie Burnett <rburnett at richieburnett.co.uk> wrote:
> 
> For anyone interested in simulating analogue hardware, I've put the LTspice schematics for three bits of classic hardware on my website for download here:
> 
> http://www.richieburnett.co.uk/temp/ltspice
> 
> They are:
> 
> "808bd.asc" - models TR-808 kick drum synthesis circuit
> "808cb.asc" - models TR-808 cowbell synthesis circuit
> "303vcf.asc" - models TB-303 ladder filter sweep on saw-tooth oscillator with full resonance
> 
> You can download LTspice from Analog Devices / Linear Technologies website. It has the option to read & write to a WAV file, which is used here so that you can play back the resulting audio in your favourite wave editor, look at the spectrum, sample it, whatever...  You can also "circuit bend" the schematic, mess with component values, etc, and listen to what influence it has on the sound.  (and of course you can put voltage and current "probes" on the schematic to look at the waveforms at the various different nodes in LTspice.)
> 
> Enjoy,
> 
> -Richie,
> 
> PS. These LTspice files are provided as is.  No support or guarantee of correctness is implied.  Use as you wish.
> 
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