Beat Detection using an op-amp

[bitfogav]

Ive been looking at ways of improving my original circuit and using a tone decoder?

http://www.classiccmp.org/rtellason/chipdata/ba1604.pdf

Contains a comparator circuit with an output logic, but you can set the frequency to precisely.

[odessa]

Hi all,

Heres a vid of mine running using the LM324. I used the same 10k resistor you did Gav for the mic ( rather than the 1k i was using ) and its much more responsive overall now. The variable resistor on the comparator helps to set the threshold just right.

[bitfogav]

Great video Jay

[brad]

That's so cool! That little LED is jammin' to the music!

[odessa]

Maybe i should try it to some Led Zeppelin ...... ...

[brad]

How about connecting it to a strobe light?

[odessa]

Thats a great idea

[bitfogav]

Ive revisited this beat detection circuit at the weekend for a new project, and I have made up a pcb test board using smd parts. I want to see how the circuit will preform using smd, in the mean time Sparkfun has just posted a great video which is perfect on this subject, which I thought I would share, will add it at the end of this post.

heres some images from my smd board:

Etched board

beattosound2.jpg (27.4 KiB) Viewed 16216 times

Parts added with solder paste

smdbeattosound1.jpg (15.69 KiB) Viewed 16216 times

[brad]

Nice board Gav! I'm guessing you used your famous PCB etching method - obviously works like a charm!

I've just been re-reading all the posts from this topic and realised that I didn't answer Odessa about the clamper circuit. I wonder where he's gone?

[bitfogav]

Nice board Gav! I'm guessing you used your famous PCB etching method - obviously works like a charm!

Yeah I used my etching method , I do use larger through hole pad sizes (2mm), and traces (0.6mm) and this time I didnt bother with any solder pour. I think thats some of my famous ecthing tips

I've just been re-reading all the posts from this topic and realised that I didn't answer Odessa about the clamper circuit. I wonder where he's gone?

Yeah not sure where Odessa has gone!?

[brad]

Well. It looks great

Have you got a permanent home for the circuit?

[bitfogav]

Well this smd circuit is a test for my next iteadstudio pcb project but I have just received a very nice strip of RGB leds which I might attached this circuit too

Link to the RGB led strip that I have just received:
http://www.ebay.co.uk/itm/160913879395? ... 1439.l2649

rgbledstri.jpg (50.94 KiB) Viewed 16192 times

rgbledstri2.jpg (159.02 KiB) Viewed 16192 times

[odessa]

Hi Guys .... I'm still here

I've been very busy with work etc and have just landed a new job

I'm still very much into my electronics and have been concentrating on C mostly ( and my many arduinos )

I'll post up some of my recent stuff when I get a chance... I've also just bought exactly the same remote/ Led controller as you Gav, I was going to make my own but when you can buy a controller and remote for £6 on ebay it hardly seems worth the effort.

Hope you are both doing well

Jay

[brad]

Hi Jay - good to hear from you

I too have been looking into Arduino - infact I made a little Arduino / Amicus18 compatible device - the PICnDuino.
http://www.bradsprojects.com/electronic ... Duino.html

C is a great language and very similar to Basic I have found (except you need one of these ; at the end of each line...)

Great to hear you're still into your projects.

As for those LED strips - It never ceases to amaze me just how cheap you can get things like this for. Look forward to seeing what becomes of those Gav

[bitfogav]

I've also just bought exactly the same remote/ Led controller as you Gav, I was going to make my own but when you can buy a controller and remote for £6 on ebay it hardly seems worth the effort.

Hi Jay, Nice to hear from you. hope your well.

I got my led strip and i'm very pleased!, seems a shame that I want to cut it up and use it for a project haha!.