Dub Siren Maskine veroboard troubleshooting

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castanheira
Learning to Wiggle
Posts: 2
Joined: Fri Nov 22, 2013 12:02 am

Dub Siren Maskine veroboard troubleshooting

Post by castanheira » Thu Feb 06, 2020 7:47 am

Hello everyone!!

I'm a newbie, still learning electronics!
I'm following this Dub siren veroboard circuit from
https://dimsos.dk/dub-siren/
dubsiren.png
but i don't know if its verified.

It's almost ready, but i cant understand if this is a correct layout, because i think it's strange that the 10k resistor isn't conected to nothing on the veroboard? What do you think? Have anyone built this?

i Know its inspired by this one: https://jacoblysgaard.com/2009/08/dyi-d ... e-rubdown/
that's why i think there something different/worng with that part of the circuit, can someone help me?
3137510536_811c39266b_o.jpg
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jeanfe
Learning to Wiggle
Posts: 2
Joined: Mon Dec 30, 2019 8:00 am

Re: Dub Siren Maskine veroboard troubleshooting

Post by jeanfe » Thu Feb 06, 2020 3:57 pm

Hello,

Looks like S2-2 SW2-3 is misplaced, you should wire it to that 10K resistor (2 rows below). Did you plan to implement the momentary switch (don't see it on vero)? It's a really nice feature for dub sirens.

You could also upgrade the 741 to a modern opamp a to get a larger bandwidth.

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castanheira
Learning to Wiggle
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Joined: Fri Nov 22, 2013 12:02 am

Re: Dub Siren Maskine veroboard troubleshooting

Post by castanheira » Thu Feb 06, 2020 8:13 pm

Thank you so much for your reply! yes i think it's misplaced too..i'm going to try to finish this layout..
Other thing i noticed, it's that the pin 3 on the Lm741 isn't connected to anything too on the veroboard layout..at the circuit diagram it's conected to one of the pots..maybe i should rewire the pots diferently too on the veroboard layout?

Nice suggestion about the upgrade! going to search for other opamp.

jeanfe
Learning to Wiggle
Posts: 2
Joined: Mon Dec 30, 2019 8:00 am

Re: Dub Siren Maskine veroboard troubleshooting

Post by jeanfe » Fri Feb 07, 2020 6:41 pm

I quickly checked the layout and found some issues that I documented here (assuming the schematics are correct). Not 100% sure if I tracked all errors though. Mind the pinout of your NPN's!

Image

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