Help please...

ShinOBIWAN · 25th June 2006, 11:54 PM

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/endecaSear...KU=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

pinkmouse · 26th June 2006, 12:23 AM

Shin, search for "softstart". There are several implementations documented here, some even with PCBs.

classd4sure · 28th June 2006, 04:05 PM

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.

25th June 2006, 11:54 PM	#1
ShinOBIWAN diyAudio Member Join Date: Feb 2004 Location: UK	Help please... 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/endecaSear...KU=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

26th June 2006, 12:23 AM	#2
pinkmouse diyAudio Moderator Join Date: Apr 2002 Location: Chatham, England	Shin, search for "softstart". There are several implementations documented here, some even with PCBs. __________________ Al I conceive of nothing, in religion, science or philosophy, that is more than the proper thing to wear, for a while. Charles Fort

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

28th June 2006, 04:05 PM	#3
classd4sure Account Disabled Join Date: Feb 2004	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.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)