Gabs Posted November 19, 2018 Share Posted November 19, 2018 Some time ago, I was directed to this site http://www.zen22142.zen.co.uk/ronj/shs.html when asking about an alarm panel schematic, I am in the process of building a panel from this website, however, I was wondering if anyone had a schematic I can use to make an SAB module, or bell module, or even if they have one would be able to get a photo of its PCB tracks, and components, so I could have a go at tracing them back out. I have an idea for a circuit, its the Ni-Cd battery charging bit I'm unsure of, any help would be much appreciated. I have included a photo of a CMOS LED flasher I made, this could be the comfort LEDs of the bell box, Gabs Quote Link to comment Share on other sites More sharing options...
sixwheeledbeast Posted November 19, 2018 Share Posted November 19, 2018 I doubt a picture of an SAB module would be much help, most are painted and you wouldn't be able to work out the traces. I also wouldn't expect for the alarm you are making you need to go into that much depth either. This is a circuit with some basic components (including my favourite the 555) that you may want to look at for a charging circuit. http://www.edutek.ltd.uk/Binaries/Circuits/Li-ion_battery_charger.pdf The Op-Amp need 3V head minimum, so if your charging a 7.2V NiCd on a 12Vdc supply you will be fine to adjust the values to suit. I assume you used a CD4069 Hex Inverter chip for your flasher? Quote Link to comment Share on other sites More sharing options...
Nova-Security Posted November 20, 2018 Share Posted November 20, 2018 9 hours ago, sixwheeledbeast said: I assume you used a CD4069 Hex Inverter chip for your flasher? I would have gone with a 4017 mono stable everything built in Did have a SAB diagram somewhere will have a look 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...
sixwheeledbeast Posted November 20, 2018 Share Posted November 20, 2018 11 hours ago, Nova-Security said: I would have gone with a 4017 mono stable everything built in You mean 555 timer? Coupled to a 4017 if you needed 3-10 scrolling LED's, like Night Rider effect. I ask because i would have used a 555 and CR network for and astable, it's such a useful IC to have in your parts bin. 10K, 10K, 47uF in the CR network is pretty close to 1Hz, handy values to have when your breadboarding stuff out. Sometimes it's fun to use what you have around. Quote Link to comment Share on other sites More sharing options...
james.wilson Posted November 20, 2018 Share Posted November 20, 2018 id go 555 too, but its what I know 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...
Nova-Security Posted November 20, 2018 Share Posted November 20, 2018 (edited) 1 hour ago, sixwheeledbeast said: You mean 555 timer? Coupled to a 4017 if you needed 3-10 scrolling LED's, like Night Rider effect. I ask because i would have used a 555 and CR network for and astable, it's such a useful IC to have in your parts bin. 10K, 10K, 47uF in the CR network is pretty close to 1Hz, handy values to have when your breadboarding stuff out. Sometimes it's fun to use what you have around. My typo meant 4047 Could do it with a 555 if you could get the mark/space ratio equal, one LED to + rail the other to - Edited November 20, 2018 by Nova-Security 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 November 20, 2018 Author Share Posted November 20, 2018 (edited) 22 hours ago, sixwheeledbeast said: I doubt a picture of an SAB module would be much help, most are painted and you wouldn't be able to work out the traces. I also wouldn't expect for the alarm you are making you need to go into that much depth either. This is a circuit with some basic components (including my favourite the 555) that you may want to look at for a charging circuit. http://www.edutek.ltd.uk/Binaries/Circuits/Li-ion_battery_charger.pdf The Op-Amp need 3V head minimum, so if your charging a 7.2V NiCd on a 12Vdc supply you will be fine to adjust the values to suit. I assume you used a CD4069 Hex Inverter chip for your flasher? Thanks for the reply. I actually used a CMOS 4001 chip, and it worked pretty well. I was thinking of using a betray like this: https://uk.rs-online.com/web/p/coin-button-rechargeable-batteries/0525815/ bit safer than a Lithium one. 12 hours ago, Nova-Security said: I would have gone with a 4017 mono stable everything built in Did have a SAB diagram somewhere will have a look Thanks, I'd appreciate that, I have a basic circuit design, just not sure of it at the moment. Edited November 20, 2018 by Gabs Spelling Quote Link to comment Share on other sites More sharing options...
al-yeti Posted November 20, 2018 Share Posted November 20, 2018 55 minutes ago, james.wilson said: id go 555 too, but its what I know Everyone from our age, although I might be older I doubt they teach it much now Quote Link to comment Share on other sites More sharing options...
Gabs Posted November 20, 2018 Author Share Posted November 20, 2018 got these two photos of a very old one I have, but its not brilliant, that's why I'm setting myself the challenge to design and make a new one Quote Link to comment Share on other sites More sharing options...
MrHappy Posted November 20, 2018 Share Posted November 20, 2018 Revann Electronics ? Quote Mr Veritas God Link to comment Share on other sites More sharing options...
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