Too simple 1 transistor bongo drum electronic circuit of the 1970s. A perhaps interesting experiment
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- Опубліковано 12 вер 2024
- Please read the description first. In an Electronics Magazine of february 1975 I found the circuit that I show in the video. Told as “mini bongo”.
I am always very curious: can it work? Does it work? Can it give out the typical “bongo” sound? It proved to be (somewhat) cumbersome, though interesting as an experiment.
Find your way when doing experiments with this circuit…
Important things to tell about this schematic:
1. We read the 1970’s, where there was no internet, no “Google”, no www. Thus no everywhere available source, where you can/could find (almost) everything, apart from (say) some context and real scientific information, etc. You have to do the real “understanding” yourself.
2. In the same magazine of February 1975 (source: Elektuur) they published a serious and long article + other eleborated electronic schematics of this kind. With all the things that are important in this case, thus adding noise to a sound (via a noise generator), sound decay, and more. I am sure (given the quality of the Elektuur/Elektor during the past decennia) you can surely rely on these old 1975’s schematics, but, of course, we live now in another time where all these things (sound, sound generators, mixers, digital audio electronics, digital mixing, sound effects) are worked out in an extremely sophisticated way via digital and analog sound synthesizers, special digital and analog sound chips, etc.
3. The loudspeaker to which I connetected the output of this “bongo” circuit could not reproduce the lower frequencies (50 Hertz-300 Hertz) at a substantial output level, say 2-4 Watt out. Perhaps this simple circuit needs a big bass boost audio amplifier and a bass boost loudspeaker. Anyway.
4. The circuit is interesting enough to do many experiments. Especially with the values of the 3 filter capacitors. See for yourself!
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Conclusion: with a power amplifier and a power loudspeaker for low frequencies (50 Hertz-300 Hertz) the circuit could perhaps work better, though the sound lacks reverberation and a kind of (say soft) noise. That is there with a normal bongo sound. It is more an electronic "plop" sound. Though with some "dangling" introduced via that potentiometer in the emitter lead. 17 June 2024.
Actually, several of these tuned differently and being cleverly triggered either manually or with an IC would create a very capable electronic drum kit! I saved this one to build soon, thanks Ko!
Thanks, good to hear that! It was a circuit of Elektuur of the 1970's, it was top brand (and Elektor still is that, nowaday, just like it was it during the past decennia). Much succes!
Interesting to me. Nice demonstration.
Great fun 👍
👍Thank you sir.
it sounds perfectly like a fart when you hit the switch! i like it!
Bem interessante da para fazer vários com resistencias fixas substituindo o potenciometro para uma bateria eletronica ou eletronic drums,obrigado por compartilhar seu conhecimento 👏👏👏
Thanks, you are welcome. This is in a kind of way an absolute basic circuit for a kind of drum (though the no-reverberation in electronics terms is a kind of problem). But when connected to an audio amplifier and a bass boost box, it could be that the audio box (when the bass-loudspeaker vibrates out) it gives a kind of bongo sound. I could not test that, anyway. The circuit, by itself, gives a lot of opportunities to do more experiments and to get other bongo-like sounds out. Thanks. 18 June 2024.
It sounded good.
Thanks.
Your microphone and YT universal equalization make it sound unnatural. With the right adjustments and playback, it will sound like a bongo.
Thanks, yes could surely be!
Use rubber plate and piesoelectric buzzer as a drum trigger.
Thanks, good idea!
sounds like a fake bongo to me , add some reverb and eq and perfect !
Yes, the lack of reverb is the problem. But with a flapping bass speaker at say 10 Watt or so it could sound good.
I have some really nice bongo/percussion circuits' that use transistors'.Do you have a 'home-page' I could send the schematics' to?
via mail radiofun232@gmail.com
Have you ever come across lasersabers SJR looper circuit as I understand it is a oscillator circuit and seems to have fantastic boost at very low amperage usage. I am working on a galvanic battery and I can run a simple oscillator circuit that I found on lidmotors channel he called it penny oscillator. The galvanic battery is outputting just under 7 volts but very low amperage I can't test for amperage on my meter but it's very low. Do you know of a good boost circuit that would be suitable? I understand if you don't want to reply but thanks you in advance if you do .😊
I found the circuit on the www. The principles are that of the joule thief. There are many joule thief circuits on UA-cam. When you switch your Ammeter in the power supply lead it must be possible to measure the current that it draws. In general more windings on the secondary coil gives out a higher voltage, though the secondary (output) current will drop in that case. Crux to get more energy out is more current in the primary coil and a high windings ratio (prim-sec coil). The ideal situation is that the coil (on a ferrite core) gets on its resonance frequency, in that case the energy conversion is at its best: it takes the smallest current on the primary and the higest voltage at the secondary winding. 18 june 2024.
@@radiofun232 thankyou so much for your reply very helpful it's a case of getting the coils to suit my output from the galvanic battery to optimise the output without reducing the small amount of amperage too much. Looks like I will be doing a lot of my favourite thing coil winding. Thankyou again for your time, 👍
@@radiofun232 p.s my meter has a fault on it fuse blown and damaged circuit I keep meaning to buy a new one. Thanks
@@johnwynne-qx6br OK!