Gabs Posted April 6, 2019 Share Posted April 6, 2019 Does anyone have any experience with these sorts of detectors that you'd get in older bell boxes? Or know how they worked? I have just made one, using the most simple bits possible, two resistors, an LDR and a 2n2222 transistor. Did they work like that a beam of light getting interrupted, or was it more advanced? Been testing mine, and I couldn't get it to false alarm at all. Thanks, Gabs Quote Link to comment Share on other sites More sharing options...
MrHappy Posted April 6, 2019 Share Posted April 6, 2019 IIRC "Viper foam detector" pcb within plastic case, size of shock sensor IR Led + Receiver below the case Used to FA when the housing filled with webs or bugs ect... Used to FA when it got dark after it had be powered up the 1st time Google has no pics & I've not see one in yrs.... Quote Mr Veritas God Link to comment Share on other sites More sharing options...
norman Posted April 6, 2019 Share Posted April 6, 2019 Yea, and the hex bells had optional paddles to detect foam, linked to a small switch on either side of sab. Quote Nothing is foolproof to a sufficiently talented fool. Link to comment Share on other sites More sharing options...
Gabs Posted April 6, 2019 Author Share Posted April 6, 2019 Thanks, I have one of the "Modern Alarms" bell boxes with these in, will get a pic. Well, mine didn't false alarm at all, during light tests I did, I'm impressed. I know, looked on Google for some pics. Don't know why they couldn't be as simple as the one that I made. Those Hexagon bell boxes were such a good design, shame they changed it. The idea of a foam detector is flawed anyway, by the time it has been squirted? in it would be too late. Quote Link to comment Share on other sites More sharing options...
james.wilson Posted April 6, 2019 Share Posted April 6, 2019 It's more for signalling. Audible only has always had limitations Quote securitywarehouse Security Supplies from Security Warehouse Trade Members please contact us for your TSI vetted trade discount. Link to comment Share on other sites More sharing options...
MrHappy Posted April 6, 2019 Share Posted April 6, 2019 their was a foam pedant (cqr ?) which had magnet to keep in vertical, foam or a 1/2 a brick being chucked a the bell would knock it in to alarm there has been all sorts of clever stuff, however the industry is very "price sensitive" 1 Quote Mr Veritas God Link to comment Share on other sites More sharing options...
Gabs Posted April 6, 2019 Author Share Posted April 6, 2019 Interesting, I understand, its easier and cheaper to buy a fully made up bell box now. Do you take many of these down? Or have any old stock of these? Would be interesting to see them. I like the fact that the internals of a bell box are on 24/7, 365 days a year, constantly for 20 years or more, never get a break. some very robust electronics. Quote Link to comment Share on other sites More sharing options...
MrHappy Posted April 6, 2019 Share Posted April 6, 2019 1 hour ago, Gabs said: I understand, its easier and cheaper to buy a fully made up bell box now. IIRC we started buying CQR Cequra's early 1990's, the 1st batch lasted forever.... 1 hour ago, Gabs said: Do you take many of these down? I can't recall the last anti foam device I removed, I have an old bell module that came down earlier in the yr , I'll pop a pic sometime Quote Mr Veritas God Link to comment Share on other sites More sharing options...
MrHappy Posted April 6, 2019 Share Posted April 6, 2019 This was removed the other week from a adaptable box in loft, oldest scantronic Digi i recall seeing 1 Quote Mr Veritas God Link to comment Share on other sites More sharing options...
Gabs Posted April 6, 2019 Author Share Posted April 6, 2019 11 minutes ago, MrHappy said: This was removed the other week from a adaptable box in loft, oldest scantronic Digi i recall seeing So this was a bell module? In the loft? Looks to be in very good condition, do you take down many standard bell modules? like SAB modules? Quote Link to comment Share on other sites More sharing options...
MrHappy Posted April 6, 2019 Share Posted April 6, 2019 (edited) 4 minutes ago, Gabs said: So this was a bell module? In the loft? Looks to be in very good condition, do you take down many standard bell modules? like SAB modules? no its a "scancom" digi unsure of model but dated 1984 ? the trick with bell modules was to leave them in the plastic bag & it stopped most of the rusting Edited April 6, 2019 by MrHappy Quote Mr Veritas God Link to comment Share on other sites More sharing options...
Nova-Security Posted April 7, 2019 Share Posted April 7, 2019 14 hours ago, MrHappy said: IIRC "Viper foam detector" pcb within plastic case, size of shock sensor IR Led + Receiver below the case Used to FA when the housing filled with webs or bugs ect... Used to FA when it got dark after it had be powered up the 1st time Google has no pics & I've not see one in yrs.... Never had a problem with them, used loads in the past Quote www.nova-security.co.uk www.nsiapproved.co.uk No PMs please unless i know you or you are using this board with your proper name. Link to comment Share on other sites More sharing options...
MrHappy Posted April 7, 2019 Share Posted April 7, 2019 51 minutes ago, Nova-Security said: Never had a problem with them, used loads in the past I think we'd about finished with them when I started I recall the sticker s being reprinted to suit the size of cequra with a tel. No with a few digits less than today Quote Mr Veritas God Link to comment Share on other sites More sharing options...
MrHappy Posted April 7, 2019 Share Posted April 7, 2019 Sab1045 bell module I fitted these in the past but can't recall who made them, red/ blk goes to a comfort led Quote Mr Veritas God Link to comment Share on other sites More sharing options...
Gabs Posted April 7, 2019 Author Share Posted April 7, 2019 2 hours ago, MrHappy said: Sab1045 bell module I fitted these in the past but can't recall who made them, red/ blk goes to a comfort led That one looks good, do you still have them? or it? I could try and copy the board design out, im in need of a schematic for one. Excuse my lack of knowledge, but what's a digital? Looks old and interesting. Quote Link to comment Share on other sites More sharing options...
Nova-Security Posted April 7, 2019 Share Posted April 7, 2019 17 hours ago, MrHappy said: IIRC "Viper foam detector" pcb within plastic case, size of shock sensor IR Led + Receiver below the case Used to FA when the housing filled with webs or bugs ect... Used to FA when it got dark after it had be powered up the 1st time Google has no pics & I've not see one in yrs.... Just for H Having a tidy up of the garage and cant believe i found one. Gabs You need a diode across the relay coil of that one you made to protect the transistor and possible a resistor to limit the current the relay pulls, well done on the MK1 cant wait to see your next projects. Send me your address and will send this V foam to you Quote www.nova-security.co.uk www.nsiapproved.co.uk No PMs please unless i know you or you are using this board with your proper name. Link to comment Share on other sites More sharing options...
Gabs Posted April 7, 2019 Author Share Posted April 7, 2019 7 minutes ago, Nova-Security said: Just for H Having a tidy up of the garage and cant believe i found one. Gabs You need a diode across the relay coil of that one you made to protect the transistor and possible a resistor to limit the current the relay pulls, well done on the MK1 cant wait to see your next projects. Send me your address and will send this V foam to you Wow, thanks. I am glad that you like my projects. I thought about a diode, and I will add one in the Mark 2 version. And thanks again, I will PM you my details. Quote Link to comment Share on other sites More sharing options...
MrHappy Posted April 7, 2019 Share Posted April 7, 2019 49 minutes ago, Gabs said: That one looks good, do you still have them? or it? I could try and copy the board design out, im in need of a schematic for one. Excuse my lack of knowledge, but what's a digital? Looks old and interesting. PM your details I will pop it in the post Quote Mr Veritas God Link to comment Share on other sites More sharing options...
Gabs Posted April 9, 2019 Author Share Posted April 9, 2019 @MrHappy @Nova-Security Cheers for the help with these, I have finished the Mk. 2 Anti-Foam module, looks very similar to the V-Foam Quote Link to comment Share on other sites More sharing options...
Nova-Security Posted April 9, 2019 Share Posted April 9, 2019 You could do with a small bit of pipe over the LED and the receiver so it doesnt pick up any stray light Quote www.nova-security.co.uk www.nsiapproved.co.uk No PMs please unless i know you or you are using this board with your proper name. Link to comment Share on other sites More sharing options...
Gabs Posted April 9, 2019 Author Share Posted April 9, 2019 Was thinking about that, I may make a Mk. 3 version with an Arduino Nano micro-controller, which has a delay on it, the Viper does to stop false alarms from insects. Might give using IR LEDs a go too Quote Link to comment Share on other sites More sharing options...
Jack b Posted December 1, 2019 Share Posted December 1, 2019 On 06/04/2019 at 20:00, Gabs said: Thanks, I have one of the "Modern Alarms" bell boxes with these in, will get a pic. Well, mine didn't false alarm at all, during light tests I did, I'm impressed. I know, looked on Google for some pics. Don't know why they couldn't be as simple as the one that I made. Those Hexagon bell boxes were such a good design, shame they changed it. The idea of a foam detector is flawed anyway, by the time it has been squirted? in it would be too late. Is that a high security modern box? Quote Link to comment Share on other sites More sharing options...
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