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I made a 32 steps drum machine sequencer, check out my channel!

I love this circuit and explanation, thanks for teaching us about this in such a straightforward way! It makes me wonder if you could make a passive drum circuit that was only powered by the voltage output of the piezo disc? Like something that could be built into a little drum pad and not need a battery or psu to make sound. I know there are passive drum circuits in things like the Landscape Noon or Neutral Labs Scrooge, would you know roughly how those circuits work?

Will try that myself thanks.

cool stuff. but i got a bit seasick now.... ;)

Excellent.

Nicely done. Congrats. :)

Very cool, but you omitted a very crucial part, a trigger mechanism, you could place 3 cd40106 inverters in series with an RC time constant (online calculator) in between the first and second inverter after the first opamp, using 1nF and 18K should give you 1 millisecond, witch is used on the TR-*** series from Roland. I found that out when i made a midi controlled TR-808 kick drum using a pic18F1320, if it aint right, it sounds weird, like whistles or fast cow bells a like if the trigger is very short. Than the sound would independent of the piezo element and have repeatable consisted timed kick drums. the accent input in the adjusts the overall voltage of the drum circuits, the repeating 2 transistor circuit at the start you see in most of tr-.... series. maybe a sample & hold circuit on the piezo element could give you somewhat of a constant accent value in combo with a cd40106 with time constant for a trigger should fix it properly. The resistor in the T bridge, the 1K might be a bit big. you should aim for 150 Hz. Would you do a second video on this with the suggested mods?

I like the simplicity of the circuit. The direct use of analog circuitry instead of microcontrollers means there is zero latency. I wonder if adding a ring modulator to the output would allow for a more metallic sound for your cymbals.

What about animation sir ?

Cool! I'll have to try this out in a few days.

Hi, I'm working with an ESP32, so I need a maximum output of 3.3V, if I connected the GPO to 3.3 V does the output range change?

First of all you should fix the SNR of your video...

I built my own set of electronic drums 30 years ago using piezo disc which then plugged into a drum module. I built each drum out of wood, with a 1/4" rubber sheet for the striking surface. The drums are octagon in shape with oak edging. On the bottom was a 1/4" female jack that were connected to the piezo. They are very playable and work great!

THey have these already designed and commercialized.

графический дизайн )))

Cool sounds, You maybe could use a transistor or better a fet on the piezo element, this should avoid negative spike and prevent the .65 voltage lost from the diode. they can't work in reverse for npn or n-type. You can load the entire tr-909 hi-hat bin file in to a Arduino Nano Every with 48k flash.

I hope you'll continue to share these videos, this is the first time I have a clear picture of how "a sound" is create with discrete components.

how did you do it?

was looking at learning how to use this module, then discovered your amps projects and that we have similar taste in music, then found myself watching full streams of surgeries. youtube is something else...

Exactly what I needed! I am so glad I can run this thing at 5v.

Lehetséges BD139-es tranzisztort az audio jelbemenetre, BD679, KT308 tranzisztort használni a jelkimentere RF erösítőként az antenna jel felerősítésre?

🔥🔥🔥🔥🔥🔥🔥

Wow love instruments like this 🤓

If you manage to operate the MCP23S17 ic with the Arduino Uno, you got an additional 16 I/O to operate the ram chip you got. Than you could build a much more advanced sampler, allowing you to adjust start and endpoints with pots, sound loops, ect. with more sound quality on 32khz.

I got a Akai S3000XL and Akai MPC X. I think you would be better off using an Arduino and connect your ram chip there, so you can adjust (and delete) the start and end points with pots or get an old S3000XL, mpc2000.

Oh yeah, totally expected a Christmas song at the end, thanks for not.

6 modules for 20 on Amazon. Why did u leave the microphone in circuit? And what op-amp did u use

Igor you are such a nerd, but a cooler one than me because you have a sweet boat lol. cant remember when I subscribed to your channel but I always enjoy watching your videos when I get the chance.

I am currently working on a disc recorder, thanks, that amplifier should be good for a preamp

Excellent experiment. Hope, u connected LED other side of resistance to +5VDC. This ADC out put would be open collector.

literally learning from your video and making a playback cassette player!! will give u the updates as and when thank you so much for this content bro!

Just wondering, i don't know nothing or little about radios, but wouldn't it be better if you raise or position the voltage of the oscillator in such a way that the voltage on the emitter never drops below the base of the transistor? change buffer to inverted config + offset. By the way, if you take 2 capacitors and put them in series, you can substract a virtual ground, than you use a opamp buffer with 2 x 10uf again in series like before to have a virtual ground that can source or sink current to build a bi-polar power supply. You can use tl074 buffer if you put like 50 ohm on each to source like 100 ma.

Cool, 4:06 you might wanna use a Fet here, high impedance input, like electret microphones.

thanks 🎉❤

Sounds good. What's the range like?

Cool! you might wanna look at the Buchla 259 oscillator, this is triangle using a LM311 to reset and current to speed controlled. some 15 parts. Buchla is the co inventor of the voltage controlled oscillator next to Robert Moog.

Use an op amp integrater circuit to improve the output of your r2r network. You'll get way better audio quality out of your experiment this way.

I'm looking for a way to control volume in movies, when they whisper it is too soft to hear and when the action starts it is too loud. I don't have the knowledge to design myself. I can understand you wanting to do your own thing, wish I could. Hope you don't mind if I copy yours when you get it working. I find movies have a much bigger volume rang than music, from my point of view. So, if you make it work with movies that is my main interest. Cheers.

You probably wanna use a Schottky diode. Check the circuit of the famous Urei 1176, you might wanna build this instead. : C)

Great demonstration. So much memories. Sad that soon will be harder and harder to tinker when all parts are more and more amd

Please also make video of components name and their symbols in your ckt diagram

i just found: AS6C1616C with is a 16 bit or 2 x 8 bit sram chip, but requires 19 address lines, 16Mb. using 74HCT245 octal transceivers you can make the 8 bit data bus bi-directional between adc / dac and sram, to shut of the sound while recording.

Pretty cool. There is pretty much only one method economic interesting to do agr is using a micro controller with adc, dac, enough opamps. in some some Arduino library for mpc4921 dac, you can find a math formula for a sine wave. it doesn't take much to figure out how to make the others. however changing speed is a subject.

Hi Igor! Greetings from Argentina. Would you be so kind as to share the schematic? Your work with the drum machine is very inspiring!

Are you holding S and R inputs high or low?

Onde está o esquema?

This is a brilliant design! I prefer to construct using discreet components as it is more challenging than microprocessors ( besides I no nothing about programming!). I have been battling to design a reciprocal circuit for measurement of speed in mph for a miniature railroad, that is in full mph not scale. Your circuit could readily be adapted to do the task by fudging clock times etc. I would be very pleased if you could send me the circuit. Thanks Ray

thank you, i'll give it go...

Impressive! Think you could have several ram chips in paralell, with a pushbutton switch to "chip enable pin" then you can change the sample fast just by pressing the buttons whilst also scratching at the same time :)

Hi!! Where can I find the schematic diagram? Thanks!!!