There’s little that can compare to the sheer obnoxious thrill of mashing the DJ siren when its your turn behind the decks. We’ve certainly been guilty of abusing the privilege at local house parties, and unsurprisingly have not been invited back. If we ever get another shot, though, we’d be glad to have [lonesoulsurfer]’s dub siren at the ready.
This is a build for the old-school purists. There’s no microcontrollers or digital hardware here. The synth relies on two 555 timer ICs as the oscillators and an LM741 op-amp. These parts harken right back to the dawn of the integrated circuit era, and still do a great job in this application. There’s also a cheap reverb/echo module added in to fatten up the sound. It’s all laced up in an old CB radio enclosure, with the classic woodgrain applique doing much to add to the aesthetic.
It’s a build that’s simple enough for the electronics beginner, and would make a great tactile, analog addition to any DJ’s rig. If you need some wubwubs to go with your woowoos, then consider building a Ball of Dub, too.
“It’s all laced up in an old CB radio enclosure”
What? That doesn’t look like any CB I am aware of, it actually looks like a large US Robotics modem, or maybe a table top scanner.
After clicking thru to the instructables website it appears to be an 80s or 90s police scanner.
Desk intercoms tended to come in that style and shape too
A realistic PRO-57 scanner
https://www.eham.net/reviews/view-product?id=5967
“It’s a build that’s simple enough for the electronics beginner”
More of these please! Everyone starts somewhere.
Elektor just started a series of articles about simpler circuits, just FYI https://www.elektormagazine.com/tags/small-circuits-revival
Though beware, on the left side of the schematic thw polarity of the 220uF electrolytic cap is shown as backwards…
Maybe the designer intended the electrons to bang a U-ey, slam it into R and beepbeepbeep reverse through it.
Could have done it with an Arduino
Boo!
Could have done with a couple transistors 😁
7 and a delay line would be my guess.
It’s a 1950’s sci-fi sound effects generator.
If you haven’t said that you made it for a DJ I could bet that you have did it for a Sci-Fi movie maker!
The perfect Christmas gift for your 6 year old nephew!
Be sure to include long lasting batteries, and lots of audio gain!
B^)
Old school way? Now I feel old.
To be fair, I did just look up Dub, which I’d never heard of and I do know you’re completely right, but that still made me feel old. To me, an Old School siren would be spinning air impellers. The newfangled way would be 555’s and transistor amps.
Howabout V8 powered? https://en.wikipedia.org/wiki/Chrysler_Air-raid_Siren
Come to think of it, that might be the first “real” ;-) application for 3D printing an eighth scale model of one of those run off compressed air or sparklet bulb or something.
Nice build ! I have a question though, how can you make such a circuit deliver its output at line level for an entry into a professional mixer ? I have in mind to use this kind of circuits in live sessions along with some cool tracks.