[sdiy] Re: RTL

[Scott Stites]

A belated thanks to all the help concerning RTL resources - it's been a
learning experience!

I've been applying Ray Wilson's MML for quite a while - the schemo for the
discrete gate was particularly exciting for me.  Usually I have either too
many gates or not enough on a 40106, so this is a very fine solution to a
lot of things I've been doing lately.

Cheers,
Scott


----- Original Message -----
From: "harrybissell" <harrybissell at prodigy.net>
To: "Peter Grenader" <peter at buzzclick-music.com>
Cc: "Scott Stites" <scottnoanh at peoplepc.com>; <synth-diy at dropmix.xs4all.nl>
Sent: Sunday, March 21, 2004 11:03 AM
Subject: Re: [sdiy] Re: RTL


> wotch it...
>
> Diode "or gates" fall into the category of DTL (Diode-Transistor Logic)...
> a brief stop between RTL (Resistor Transistor Logic) and TTL.
>
> Craig Anderton's "Timbre Gate" project from Popular Electronics used
> an RTL nand gate (iirc) abused to become a linear amplifier in a fuzz
> circuit - my first DIY project at 15yrs old (long long ago)
>
> H^) harry
>
> Peter Grenader wrote:
>
> > Look at Ken Stone's site.  He uses discrete logic gates all the dang
time.
> >
> > I have a couple on Milton as well (diode OR gates) for the manual -or-
> > external start/stop commands that reset a flip flop required to create
the
> > obedient pulse that drives the whole magila.
> >
> > Scott Stites wrote:
> >
> > > Can anyone point me to some good web resources on these techniques
(RTL logic
> > > gates rather than IC's)?
> > >
> > > Cheers,
> > > Scott
> > >
> > >
> > > -----Original Message-----
> > > From: TIm Daugard <daugard at sprintmail.com>
> > > Sent: Mar 19, 2004 11:01 AM
> > > To: synth-diy at dropmix.xs4all.nl
> > > Subject: [sdiy] Re: RTL
> > >
> > >
> > >> Ah yes...RTL.  When I was in high school (1969) I built a 4 bit
binary
> > >> up/down counter using the Motorolla HEP RTL parts.  I think I still
have
> > >> some of those dang things....somewhere.  RTL brings back only happy
> > >> memories for me...since I never had to design the stuff into a real
> > >> product...
> > >
> > > I still use RTL. A transistor and two or three resistors is cheaper
than using
> > > a
> > > logic chip if I only need one or two gates. Two resistors and a 7 cent
> > > transistor gives me an inverter. Three rsistors and the transistor for
a gate.
> > > Sometimes I cheat and throw in a diode or two.
> > >
> > > I need to try some of the single gate mini chips, but I've been
avoiding
> > > etched
> > > PC boards and SMD. I can build a module in the time it takes to lay
out an
> > > etch
> > > a board.
> > >
> > > Tim Daugard
> > >
> > >
> > >
> > >
> > > PeoplePC Online
> > > A better way to Internet
> > > http://www.peoplepc.com
> > >
>