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slaz
Old Croc Joined: 27 November 2009 Location: London E2 Status: Offline Points: 2713 |
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Posted: 20 January 2017 at 6:36pm |
Some of those digital numeric displays can consume up to 20-30 mA - which doesn't sound much - but it could easily be as much as the idle current of a class D chip-amp.
On my best setup I have a momentary-contact microswitch to only enable the VM on the fly. |
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REMEMBER....POLITICIANS AND DIAPERS SHOULD BE CHANGED OFTEN AND FOR THE SAME REASON
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ostrichmilkman
Registered User Joined: 25 October 2010 Location: south norfolk Status: Offline Points: 137 |
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As you say in the past i just opted for a volt meter so I may well just do that l. Hadn't thought about that its a good point and another reason to just stick with the cheaper option.
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work like a dog party like animal
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slaz
Old Croc Joined: 27 November 2009 Location: London E2 Status: Offline Points: 2713 |
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Don't know anything about that unit - but IMHO its preferable to just build in a cheapie voltmeter and monitor the battery voltage manually ..... (much cheaper also). If your battery is anything other than in perfect nick - it will have a significant internal resistance - which in turn means voltage will drop on a heavy bass note/kick drum/other peak in signal - which might well trigger the cut-off when the battery still has useable capacity. |
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REMEMBER....POLITICIANS AND DIAPERS SHOULD BE CHANGED OFTEN AND FOR THE SAME REASON
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bitSmasher
Old Croc Joined: 23 June 2012 Location: Melbourne Status: Offline Points: 2296 |
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Where in Aus are you?
Jaycar have a couple of options for battery cut-out, |
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https://www.instagram.com/batteryacidsoundsystem/
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Ganon
Registered User Joined: 07 May 2014 Location: Denmark Status: Offline Points: 114 |
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I have tested it on Electro Voice sx200, and that sounded good, i have it put up to some Argon hifi speakers at my work, and that sound pretty good aswell, many people use it in the boominator.
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ostrichmilkman
Registered User Joined: 25 October 2010 Location: south norfolk Status: Offline Points: 137 |
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Awesome ill have a pool cheers. Have you heard it in use what sort of drivers was it running ???
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work like a dog party like animal
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ostrichmilkman
Registered User Joined: 25 October 2010 Location: south norfolk Status: Offline Points: 137 |
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Awesome ill have a look mate cheers
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work like a dog party like animal
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Ganon
Registered User Joined: 07 May 2014 Location: Denmark Status: Offline Points: 114 |
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Dont know if they ship to Aus, but take a look at Accusafe's products, they have a battery protect board, and a maxamp, that uses less then ta2020 and gives more watt.
And it's tiny, really tiny. |
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ostrichmilkman
Registered User Joined: 25 October 2010 Location: south norfolk Status: Offline Points: 137 |
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liking the look of this bad boy
any knowledge on how the ta2021 stacks up against the ta2020 ? also could do with some help getting my head around A: making a circuit that will automatically turn off the system when the voltage drops too low B: being able to charge and use the boom box at the same time without interference, (thinking of making it solar powered at some point) |
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work like a dog party like animal
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ostrichmilkman
Registered User Joined: 25 October 2010 Location: south norfolk Status: Offline Points: 137 |
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hey guys
been a while since i was last on here just moved out to Australia and had to leave my beloved boom box behind and its making me sad. thinking of building a new one but on a pretty serious budget this time. thinking the cheapest way would be to just buy some old hifi speakers and nick the drivers and crossovers out of them and probably use a sla 12v battery for power the question is, what amp should i use ? is the old lepai ta2020 still my best bet ? found this on ausi ebay that seems to fit the bill but its worryingly cheap and im wandering if anyone can vouch for it or if anyone knows of a decent cheap amp board that will run a couple of bookshelves. or even a mono amp that would just run one but really well. ??? probably a much asked question but any advice would be mega appreaciated cheers guys
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work like a dog party like animal
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