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Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Would it help if such 'blobbed' cheapie boards were treated by covering the blob with varnish or some moisture-resistant sealant when new to make them last longer?
I'm assuming these cheap items work well enough when new and indoors but if used much outside will degrade.
SentinelAeon has stated his/her aims, along with a preference that it doesn't involve use of his phone's Bluetooth. That's fine with me.
Bluetooth is simple solution but there may be reasons he doesn't want to be open about and this may seem irrational to some other posters but I say let...
I assumed one of two reasons - either this is part of a bigger project or you're learning to use ARM.
It's never helpful for someone to raise objections to your project or question your aims without knowing why you're doing it. The only way to stop people doing that is to say clearly when...
Maybe employers are looking for team players who will help the business succeed by working together, not make every decision on what they, the selfish individual employee wants to do.
The campfire thing is not a helpful analogy. You're still thinking narrowly about risk and harm to the...
I was perhaps a little harsh in my choice of words, but not much.
Those who accept the choices made by the 'reluctant' (but excluding those advised on individual medical grounds) may be offering 'understanding' from the viewpoint that personal choice is paramount while helping reduce the...
Oh - the Bad Loser Guy! ;)
No, I was aware. It should be no surprise that people who fall for downright lies and loudmouthery in politics use the same poor judgement to let lies and misinformation pass without letting it trouble their intellectual faculties in other areas of life.
Yes, I had my Oxford Astra Zeneca jabs in mid-March and late May. No side effects beyond the mildest upper arm soreness imaginable.
Anyone (without good medical advice due to their specific medical condition) who doesn't accept the vaccine when offered needs their head examined and is helping...
I won't say it's a waste of time - if you are interested enough to put time into investigating this old hard drive it's your choice. I'd find it interesting too and quite likely would play about and give it a go. In my case I'm always afraid of damaging something I can't easily replace. I don't...
Hello K I S S. Thanks so much for those links. I can't think why I didn't respond at the time but was busy around then just before Christmas.
The first one from David Buckley dmxring looks great and I'd love to be able to trigger it over DMX512 but at present I'm told it needs to be wireless...
audioguru Non-electro-mechanical sounders have been common on landline phones for probably over 30 years. They respond to the ring signal and produce something I can only describe as 'warbling' electronic sound which varies depending on the manufacturer. One person I know still has the older...
Yes, I'm thinking 40V minimum and willing to raise it if necessary. In this play there is some discussion as to whether to answer the phone so they need to be heard over it.
I don't quite get your second paragraph, can you explain a bit more please?
The phone for the current production doesn't have an electro-mechanical bell and I'm not going to mess about with its insides. My intention is to make something simple which any landline phone can be connected to, so it can be used for future productions too. I just need to provide the ring...
I'm just thinking - if the 1 REN is only 5mA at the secondary, what current does the the 'primary' need?
Say if I find a 240V to 12V transformer and swap it round, the low voltage will require 20x the current at the high voltage side or 100mA.
Allow double that for inefficiencies including...
The figures I've seen on ring voltage vary but my recollection is something upwards of 40V and at the phone will depend on line length etc. Frequency is definitely different in US to here. I always heard phones on old US tv shows as sounding (musically) 'flat', like you should expect bad news...
Thanks, this makes more sense and if Nigel is right sounds like a good simple way forward.
I'll look through my junk for a suitable small transformer and then fake a rough sinewave at 25Hz with initially an Arduino and some sort of amp/drive. If I can get the basic ring right, then the ring...
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