555 Timer and CD4040 Multi-Octave Synth Tone Generator

[@jj74qformerlyjailbreak3]

Putting the Ldr in series with the pot makes all the difference. My animals love it.

[@arenotdiy]

There is an interesting chorus effect happening, when you're just doing the first sound test of individual signals, I'm not sure if it the Mic or what, but I love "side" effects. Great video, I love the 555 sounds :)

[@jrbland86]

That's awesome! I think I came to this idea somewhat in parallel with you, but I have not yet been able to get one to work properly. My idea is that with 12 555 timers and 12 of these ripple counters one could basically get every note in the equal temperament tuning within the normal range of human hearing.

[@arenotdiy]

That's the idea behind old Hammond organs, just with more archaic components

[@electronic7979]

Excellent item

[@alvarobyrne]

¡Uff! Bravísimo

[@MrGoatflakes]

Cool! what are the little breadboard legos called/where do get them. I _need_ them :D

[@GadgetReboot]

if you search eBay for mini breadboard several types will show up including the Lego.

[@MrGoatflakes]

@@GadgetReboot ooo thanks :D

[@dangfd551]

12:31 how would you minimize that?

[@GadgetReboot]

I can’t remember the exact circuit so if I were repeating it today I would want to look at the signals on the scope as that DeTuning is going on and see what’s happening like maybe the direct output of the 555 would need to be buffered by a logic gate or something to keep it from having some sort of loading effect and to generate a fresh signal at full voltage swing because the 555 output doesn’t go all the way to the positive supply and things like that and maybe I would want to just put a current meter in series with the power supply and see if the current dramatically changes as this is happening to see if it really is related to that and maybe a battery is not the best option to power it if internal resistance changes the circuit behaviour when the load current changes and things like that.

[@Sarahbuildsstepsequencers]

This is really interesting! Mmmight you be continuing with this line of circuits?

[@GadgetReboot]

I know it’s been a while since I worked with audio circuits but there is definitely one that I will be building sometime soon out of some logic gates and counters that I made a couple of decades ago where different sound effects can be generated depending how the gates are set up. But even before I get to that, I was going to do another teensy audio experiment hopefully this week where I can do audio processing like delay, reverb etc and so I am definitely easing back into the audio circuits. I was thinking if I get that audio effect processor working, it would make little oscillators and sound affects even more fun if I run them through that.

[@Sarahbuildsstepsequencers]

Gadget Reboot hooray! I’m so happy you’re ‘doubling back’! Yeah, those will be an excellent next step. Geeking out, just a little extra, here. Thank you for your reply!

[@Sarahbuildsstepsequencers]

Btw, what is a “spice model?”

[@GadgetReboot]

Where SPICE is a circuit simulator www.analog.com/en/design-center/design-tools-and-calculators/ltspice-simulator.html A SPICE model is like a plugin that describes parameters or behaviours for a component, for example a simulation can use an idealized op amp, but in order to simulate something more accurate for a specific part number that will be used in a real circuit, if the manufacture has created a SPICE model, that can be downloaded and used in the simulation and the performance of the simulation will better reflect the real circuit. It might contain specific things like the gain of the op amp, whether it can go rail to rail, input and output impedance etc. I once made a filter circuit with an op amp and simulated it with an ideal op amp and it worked fine, then on the breadboard my output signal was loaded down as a flat line. I couldn’t figure out what went wrong but I saw that there was a SPICE model I could download for my specific op amp so I used that in the simulation and then it also went flat line. It turns out the filter had a capacitor on the output that the op amp didn’t like so I had to choose a different one and then it worked as expected.

[@GadgetReboot]

I just put out another video along these lines kzbin.info/www/bejne/nqeYkIGpm5uqebc

[@OmBotCult]

Is there a way to feed multi clock signals into the 4040?

[@GadgetReboot]

Sounds straightforward enough, depending what is actually required. Selecting between multiple clock sources one at a time could be a multiplexer such as a CD4051 chip where you can have multiple input clocks and then setting the control pins you choose which one gets to the common output www.ti.com/lit/ds/symlink/cd4053b.pdf If multiple clock sources are to be merged so that a new overall clock is created based on all the different rising and falling edges, maybe just a bunch of OR gates with a clock on each input, and any unused inputs grounded, and keep ORing the outputs into new inputs until it's just a final single output as a new clock, that would give some new unique result.

[@mastercat]

hi..is possible to have at output the 12th tones of given freq.. separately to make chords? awesome

[@GadgetReboot]

Each lower pitch is half the frequency of the previous using this divider, so we can mix multiples together to get octaves at the same time but chords would need other frequencies that aren't in this multiple so we'd have to try another way to get different divisions

[@mastercat]

can input any waveshape? and give the same waveshape at output?

[@GadgetReboot]

We can put in any shape but since it's digital logic, it will just generate square/pulse outputs based on when the input transitions between high and low.