Electronic component assembly

A[L]C

A[L]C

A[L]C

Soldato
Joined
18 Oct 2002
Posts
7,514
Location
Maidenhead
Hi all,

Does anyone know of a small company or individual who will assemble a small electronics kit? I need a couple sound activated switches building. They come in a kit but I'm not competent enough at soldering. Only found large companies who obviously have a large minimum order.

Thanks
 
Not sure I can link to it (think its ok but don't want to take the chance), but if you google '445-054 switch' you can find it.

Thanks
 
I've got some solid solder 0.3mm flux core 63% tin 37% lead, and one of the Maplin 50W solder stations, which I believe is pretty rubbish. Just don't really have the patience to do it!

edit: had someone I found offer to do it for £20 per kit plus postage
 
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No not really! Looking at the image, the potentiometers (I think thats what they are) don't have any stalks on them. I'd like to put it inside a box with externally accessible stalks, so I guess I could change the potentiometers?

Looking at the images here:

https://www.google.co.uk/search?saf...JAL&ved=0CB4Qwg4oAA&biw=1600&bih=775#imgdii=_

it looks like a 22k and 100k? Is there any particular type I'd need?

edit: also, it looks like VR2 (the 100k pot) allows the relay to stay on between 1-60 seconds. If I wanted to extend this time, is that possible? The datasheet can be found here:

https://www.dropbox.com/sh/ye906mlqx2qfajy/AABy7St-0EYLCte5cpFn2cBra?dl=0
 
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Potentially could be, yeah. One is to adjust the sound sensitivity, and one to adjust the delay that the light will stay on for. If you are talking you might want to decrease the sensitivity for example.
 
To give a bit of background, I am making what is known as a bivvy box (in carp fishing). Its basically a 12v battery in a box so you can charge your phone etc when fishing overnight(s).

Would this design work?

bivvy-box_zps6592f002.png


The way I think it will work is there is a main switch to turn the box off. When this is on, there is a 3 way switch which can either switch the LED strip on, off or to use the sound activated switch. The image for the sound activated switch is wrong, but in essence it has a 12v power supply, then can switch another power source (so it has 4 inputs), however I am running this off the same power source.

Independant to this are a voltmeter, usb charging socket and cigarette socket. Each of these are independently switched.

How's it looking?
 
Just the led.

The idea is when the switch detects the noise from the bite alarms it turns on allowing you to find your shoes/tent zip etc
 
Yeah that's true enough. I can put the receiver on top of the box too so should be fine.

Any ideas how I could increase the latching time from the advertised 60 seconds?
 
It would be more reliable but should I mess it up it would be over £60 to replace the receiver
 
Wow you are one smart cookie!!

Once I've made the box i'll be looking in to adding an external enclosure with a PIR sensor which I would want to wirelessly trigger the led strip. Think I've found the best brains to pick!

Regarding the main box construction, what's the best way to join multiple cables together?
 
What about one of the wago spring fit connectors?

For those of you who are interested, this is an example of one of the commercially available units..


Rather than use sound, this guy has managed to intercept the signal sent from the alarm to the receiver to trigger his light. I think this will cause problems though as you could potentially pick up someone else's alarms!


Regarding the PIR component I mentioned, this is a much more advanced unit which hooks in to the alarm receiver, but mine will hok back to the bivvy box and trigger the light and a buzzer.

 
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