Lo all,
I'm currently in the process of building a few amplifiers to power some 3-way actives.
I'll not bore with details on the amps themselves but I do have a question regarding the power switch.
I've bought some of those milled finish with inset LED push button types. I believe the brand is Bulgin.
Here's the switch:
http://uk.farnell.com/jsp/endecaSearch/partDetail.jsp?SKU=4303076&N=0
And datasheet:
http://www.farnell.com/datasheets/36350.pdf
OK, so basic stuff so far...
My question (finally) is how do I create a simple logic circuit that senses the closed circuit when the button is pressed and activates a relay to power on the amp? Likewise for turning the amp off.
If possible it would be nice to have a couple of seconds delayed startup of the amp modules to avoid turn on thumps and the reverse for turn off.
I'm a complete electronics idiot BTW. I've built 5 amps and various XO and other circuits but all were kits and simply required soldering - a monkey could be taught to do that. So any explanation will have to be very easy to understand otherwise I just get very confused very quickly 😀
I'm currently in the process of building a few amplifiers to power some 3-way actives.
I'll not bore with details on the amps themselves but I do have a question regarding the power switch.
I've bought some of those milled finish with inset LED push button types. I believe the brand is Bulgin.
Here's the switch:
http://uk.farnell.com/jsp/endecaSearch/partDetail.jsp?SKU=4303076&N=0
And datasheet:
http://www.farnell.com/datasheets/36350.pdf
OK, so basic stuff so far...
My question (finally) is how do I create a simple logic circuit that senses the closed circuit when the button is pressed and activates a relay to power on the amp? Likewise for turning the amp off.
If possible it would be nice to have a couple of seconds delayed startup of the amp modules to avoid turn on thumps and the reverse for turn off.
I'm a complete electronics idiot BTW. I've built 5 amps and various XO and other circuits but all were kits and simply required soldering - a monkey could be taught to do that. So any explanation will have to be very easy to understand otherwise I just get very confused very quickly 😀
Shin, search for "softstart". There are several implementations documented here, some even with PCBs. 😉
There's a few discrete circuits that can get you the momentary action you're after, but I think the easiest way to do it is likely to remain a PIC microcontroller believe it or not.
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