norman Posted April 23, 2019 Share Posted April 23, 2019 What he said... Quote Nothing is foolproof to a sufficiently talented fool. Link to comment Share on other sites More sharing options...
Gabs Posted April 23, 2019 Author Share Posted April 23, 2019 58 minutes ago, MrHappy said: they wrote to every household in the UK to inform them of a potential fire risk in their external sounder, which resulted every alarm co. being asked by loads of worried customers if the completely different box was going to burn them to death.... That just from water getting into them? Thats no good, It is loud though, 120dB Quote Link to comment Share on other sites More sharing options...
MrHappy Posted April 23, 2019 Share Posted April 23, 2019 8 minutes ago, Gabs said: That just from water getting into them? IIRC strobe design fault, buts its 25yrs ago Quote Mr Veritas God Link to comment Share on other sites More sharing options...
Gabs Posted April 23, 2019 Author Share Posted April 23, 2019 Yeah, must have cost them a lot of money. That was my worry when trying to design an SAB, how the battery charging circuit could potentially cause a fire Quote Link to comment Share on other sites More sharing options...
james.wilson Posted April 23, 2019 Share Posted April 23, 2019 It wasn't lithium based back then 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...
Gabs Posted April 23, 2019 Author Share Posted April 23, 2019 6 minutes ago, james.wilson said: It wasn't lithium based back then I know, so there is little risk of Ni-Cd causing a fire? That is what I was going to design my SAB with? Quote Link to comment Share on other sites More sharing options...
james.wilson Posted April 23, 2019 Share Posted April 23, 2019 Ni cads can take a lot of abuse when I used to race model cars you could put more into them than so called fast charging today. Used to thermal charge at a stupid temp limit. Used to put the thermocouple on the pack. Ni mh was a good compromise of capacity etc but I'd go nicad on a bell if I wanted to design one 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...
Gabs Posted April 23, 2019 Author Share Posted April 23, 2019 Yeah, I have a 6v one, stolen from the PCB of my dead hexagon Modern Alarms bell box, was happy for me to put in 12v all day, drew no current, didn't get hot and it held a charge fine, probably how most SABs do the charging, constantly cutting power into the battery, through the Hold-Off Voltage Quote Link to comment Share on other sites More sharing options...
MrHappy Posted April 27, 2019 Share Posted April 27, 2019 @gabs you seen this tat before? Quote Mr Veritas God Link to comment Share on other sites More sharing options...
sixwheeledbeast Posted April 27, 2019 Share Posted April 27, 2019 Red for bed.. Quote Link to comment Share on other sites More sharing options...
Gabs Posted April 27, 2019 Author Share Posted April 27, 2019 (edited) 14 minutes ago, MrHappy said: @gabs you seen this tat before? Avanti? Never seen or used one, why? The IC is Philips, not seen that before. And the T A D B Bell connections make me think of ADE Edited April 27, 2019 by Gabs Quote Link to comment Share on other sites More sharing options...
MrHappy Posted April 27, 2019 Share Posted April 27, 2019 (edited) 10 minutes ago, Gabs said: Avanti? Never seen or used one, why? After selling ADE the names behind it had a second go with MDT which didn't do so well The PCB is marked as http://www.gspkcircuits.ltd.uk Edited April 27, 2019 by MrHappy Quote Mr Veritas God Link to comment Share on other sites More sharing options...
Gabs Posted April 27, 2019 Author Share Posted April 27, 2019 1 hour ago, MrHappy said: After selling ADE the names behind it had a second go with MDT which didn't do so well The PCB is marked as http://www.gspkcircuits.ltd.uk ADE Sold to Novar and in turn to Honeywell? Funny how Honeywell own them, yet the newest Accentas still say ADE on them. I would be interested to get my oscilloscope on that Avanti and compare the serial data to an Accentas. I bet they would be the same or similar. So, GSPK make the boards, I wonder if they are also involved in the circuit design? Or thaw as done by whoever previously worked at ADE and left when they were sold? Quote Link to comment Share on other sites More sharing options...
al-yeti Posted April 27, 2019 Share Posted April 27, 2019 5 hours ago, sixwheeledbeast said: Red for bed.. I still sell the idea with hkc Pete red tags do well for part set lol Quote Link to comment Share on other sites More sharing options...
MrHappy Posted May 4, 2019 Share Posted May 4, 2019 (edited) On 21/04/2019 at 11:33, MrHappy said: Cqr intrega was the 1st complete plastic Ewd I recall... ripped this of the wall on Friday- Edited May 4, 2019 by MrHappy Quote Mr Veritas God Link to comment Share on other sites More sharing options...
MrHappy Posted May 4, 2019 Share Posted May 4, 2019 the pcb is the same as I recall in the ceqara ? Quote Mr Veritas God Link to comment Share on other sites More sharing options...
Gabs Posted May 4, 2019 Author Share Posted May 4, 2019 18 minutes ago, MrHappy said: ripped this of the wall on Friday- Looks interesting, I think I have seen them before Look like this? Did it still work when you took it down? Quote Link to comment Share on other sites More sharing options...
MrHappy Posted May 4, 2019 Share Posted May 4, 2019 that's the item... this unit had failed, a siren had been added inside the box which had also failed... Quote Mr Veritas God Link to comment Share on other sites More sharing options...
Gabs Posted May 4, 2019 Author Share Posted May 4, 2019 5 hours ago, MrHappy said: that's the item... this unit had failed, a siren had been added inside the box which had also failed... Seen a few of them. Don't know why they were made so big, since it is all slim electronics. Do you still think there is any market for bell boxes that use real bells? Quote Link to comment Share on other sites More sharing options...
sixwheeledbeast Posted May 4, 2019 Share Posted May 4, 2019 I fail to see why you would want mechanical devices that are quieter and can wear over a piezo. Quote Link to comment Share on other sites More sharing options...
Gabs Posted May 4, 2019 Author Share Posted May 4, 2019 6 minutes ago, sixwheeledbeast said: I fail to see why you would want mechanical devices that are quieter and can wear over a piezo. Would have thought it was because they are more distinctive like the Piezo, I could have a go at designing something that looks modern and slim yet has a bell, like a EuroBell, just been thinking of manufacturing processes that could be used to make such a bell box.. Quote Link to comment Share on other sites More sharing options...
MrHappy Posted May 4, 2019 Share Posted May 4, 2019 a bell is expensive & really heavy I'd assume a speaker & the sound of mechanical bell would be the modern way to do it Quote Mr Veritas God Link to comment Share on other sites More sharing options...
Gabs Posted May 4, 2019 Author Share Posted May 4, 2019 4 minutes ago, MrHappy said: a bell is expensive & really heavy I'd assume a speaker & the sound of mechanical bell would be the modern way to do it Do you think people would buy it/be interested? Just a standard speaker like an extension style speaker? I know of an amplifier circuit and would be able to find some sort of sound generation IC out there. Quote Link to comment Share on other sites More sharing options...
sixwheeledbeast Posted May 4, 2019 Share Posted May 4, 2019 10 minutes ago, MrHappy said: I'd assume a speaker & the sound of mechanical bell would be the modern way to do it :shudder: Reminds me of them awful Scantronic Homelink panels, bell was replaced three times before it got ripped out for a wired one. Quote Link to comment Share on other sites More sharing options...
al-yeti Posted May 4, 2019 Share Posted May 4, 2019 10 hours ago, MrHappy said: that's the item... this unit had failed, a siren had been added inside the box which had also failed... Didn't the box crack or flake apart? Quote Link to comment Share on other sites More sharing options...
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