I’m looking at building a Baby 8 step sequencer that Sam talks about in one of his videos and I’ve come across this post that I need to ask some circuit noob questions about.
In here:
What the heck is going on between the two 4093s? Do you take the ouput from the previous 4093’s pin 3 and run it to pin 1 & 2 of the next? If so, I really don’t understand the logic going on there and could use some explanation.
The same thing happens in the hold and step circuits… Clearly I am still illiterate in reading schematics because I’m sure this is very simple…
The other question is that is looks like the CD 4093 has 4 switches in it, and this circuit calls for using 4 x 4093s. Could one 4093 be used instead, and just make use of all the switches in it?
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The circle on the output means that the gate is inverting. Two inverting gates in a row gives you the original polarity back.
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So you take the output on pin 3, and feed it to pins 1 & 2 on the next 4093 just to invert the signal back to its original?
Not sure why they drew the schematic that way. Of course you’d use the four Schmitt triggers in one 4093 before putting another 4093 on the board. So for instance HOLD and CLOCK go to pins 1 and 2, then output on pin 3 goes to pins 5 and 6, and output on pin 4 goes to pin 1 on the 4030, and so forth.
Heh. I notice the post ends “This page is by no means complete, but will have information consistently added” and has apparently not been updated beyond that since January 2013.
Your basic Baby 8 doesn’t have any of those features described there… they are good but not necessary. Sam’s Arduino-based 8 step sequencer is a different approach to adding functionality beyond the Baby 8 design.
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Yeah, while the pure logic solution works, it’s not much cheaper than a Duino nano that has more possibilites.
Sams working on an infinitely expandable 8… Using multiple Arduion nanos
I am working on a 64 “Cheap Step Pro”… Using an Arduino Mega and a Nano(just for clock)
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I actually have a Nano kicking around leftover from a BIG BUTTON I couldn’t get to work. My hesitation in using the Nano is messing with code in a language I don’t fully understand, when I’d rather spend time learning/creating circuits.
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That nano is probably going the help you a lot eventually. Not that you will, but for an example I have one laying around just to program a 512k eeprom.
Nanos are amazingly versitile.
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