if those were mine, i will measure the dc resistance of the coils, then use ohms law to determine the series resitance needed for the dc supply available.......i have done this in past projects, good results.....😀
AndrewT you're right, a resistor can be used to drop Vcc down for the relays. Each 12V coil is 275 ohms and the pcb looks like 100ohms 2W, which gives a range of 28-48VDC.
I get cranky (crazy?) about stripped down circuits being false economy. Where is the back-emf diode anyhow, the LED isn't going to do it. I know it slows the relays down but the UCP1237 is gonna get beat up. Bi-polar input caps would help too.
I get cranky (crazy?) about stripped down circuits being false economy. Where is the back-emf diode anyhow, the LED isn't going to do it. I know it slows the relays down but the UCP1237 is gonna get beat up. Bi-polar input caps would help too.
Hi.
I am looking for a recommendation for a 'Delay/Protection' board from ebay and didn't want to start a repeat thread. I am in Melbourne, Australia and am open to any suggestions for anything closer to home. I found a few options on ebay and wanted to get some feedback from people more experienced than I.
This is a cheap options, is it worth spending more? I could use resistors to drop the power from the 22v trany.
http://www.ebay.com.au/itm/Speaker-protection-board-DIY-kit-Components-kit-for-Stereo-AC-12-15V-/221268315012?pt=US_Amplifier_Parts_Components&hash=item33849e8b84&_uhb=1
This can operate using 24v MAX, I have no idea if its any better quality?
http://www.ebay.com.au/itm/2-channel-Stereo-Speaker-protection-board-LED-assembled-/171122672941?pt=US_Amplifier_Parts_Components&hash=item27d7b4c52d&_uhb=1
Claiming to use OMRON relays? Is It worth the extra money? Not sure what voltage it requires?
http://www.ebay.com.au/itm/Omron-Upc1237-speaker-protection-kit-18-/190862932074?pt=US_Amplifier_Parts_Components&hash=item2c7051386a&_uhb=1
They will be used after an LM4780 Diy kit and hopefully I can power then off the same 22v tranny's I am using for the amps.
Many thanks for any input. Open to any suggestions.
Dean
I am looking for a recommendation for a 'Delay/Protection' board from ebay and didn't want to start a repeat thread. I am in Melbourne, Australia and am open to any suggestions for anything closer to home. I found a few options on ebay and wanted to get some feedback from people more experienced than I.
This is a cheap options, is it worth spending more? I could use resistors to drop the power from the 22v trany.
http://www.ebay.com.au/itm/Speaker-protection-board-DIY-kit-Components-kit-for-Stereo-AC-12-15V-/221268315012?pt=US_Amplifier_Parts_Components&hash=item33849e8b84&_uhb=1
This can operate using 24v MAX, I have no idea if its any better quality?
http://www.ebay.com.au/itm/2-channel-Stereo-Speaker-protection-board-LED-assembled-/171122672941?pt=US_Amplifier_Parts_Components&hash=item27d7b4c52d&_uhb=1
Claiming to use OMRON relays? Is It worth the extra money? Not sure what voltage it requires?
http://www.ebay.com.au/itm/Omron-Upc1237-speaker-protection-kit-18-/190862932074?pt=US_Amplifier_Parts_Components&hash=item2c7051386a&_uhb=1
They will be used after an LM4780 Diy kit and hopefully I can power then off the same 22v tranny's I am using for the amps.
Many thanks for any input. Open to any suggestions.
Dean
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I use Rod Elliott's P33 PCB and a PCB I designed for Altronics 16A relays for LM3886 amps, one bridged. I will also use them when I start to use the parallel and bridged LM4780 PCBs I made. They work well for me. (PS, did you ever get that PM I sent asking about your miniDSP setup?)
Abs
Abs
G'day Abs.
I just found and replied to your PM. Sorry I missed it.
Regarding your Rod Elliot kit:
I assume it stereo?
I cant seem to find a parts list?
Where did you order all your parts from?
I need to get some sort of protection sorted before I turn my system on again. This bloody miniDSP loves killing gear, even with the miniDC connected I still get a decent thump at turn on. So far its killed 2 x Vifa XT25TG-04's and 1 x Alpair 7.3.
Regards
Dean
I just found and replied to your PM. Sorry I missed it.
Regarding your Rod Elliot kit:
I assume it stereo?
I cant seem to find a parts list?
Where did you order all your parts from?
I need to get some sort of protection sorted before I turn my system on again. This bloody miniDSP loves killing gear, even with the miniDC connected I still get a decent thump at turn on. So far its killed 2 x Vifa XT25TG-04's and 1 x Alpair 7.3.
Regards
Dean
Hi Dean,
The Elliott kit is stereo, in that it detects faults in L & R channels and has provision for two relays. As I said above, I have done a design for a PCB to use two 16A altronics relays that I am quite happy to provide to you to make some boards. It uses "U" shaped 1/4" spade connectors.
The P33 is $16.50 plus postage. It is small and works. The parts list is as the circuit but if you buy thge boards, you get access to the secure area for a full BOM. All of the parts are readily available and you could get the lot, including relays, from a web order from Altronics.
Thanks for the info about your miniDSP setup. I still don't understand so I will PM you.
Abs
The Elliott kit is stereo, in that it detects faults in L & R channels and has provision for two relays. As I said above, I have done a design for a PCB to use two 16A altronics relays that I am quite happy to provide to you to make some boards. It uses "U" shaped 1/4" spade connectors.
The P33 is $16.50 plus postage. It is small and works. The parts list is as the circuit but if you buy thge boards, you get access to the secure area for a full BOM. All of the parts are readily available and you could get the lot, including relays, from a web order from Altronics.
Thanks for the info about your miniDSP setup. I still don't understand so I will PM you.
Abs
Hey Abs.
Cost wise, can you remember roughly what I might be looking at for the P33 parts?
I have never made my own PCB's so that might be a bit of a stretch. I am hoping to get this sorted by Friday the 18th for my birthday, kinda of a present to myself.
I hope I can help with the MiniDSP stuff. They are great once setup properly.
Cheers
Dean
Cost wise, can you remember roughly what I might be looking at for the P33 parts?
I have never made my own PCB's so that might be a bit of a stretch. I am hoping to get this sorted by Friday the 18th for my birthday, kinda of a present to myself.
I hope I can help with the MiniDSP stuff. They are great once setup properly.
Cheers
Dean
Hi Dean,
The relays are $5.00 each (two of) and the rest of the bits are about five to seven dollars, depending on where you get them but you may have most of them anyway. They are common parts.. I can do a PCB for the relays for you (just got to find the etchant).
I must admit the $5 kit above seems a bargain but how would you power it? It needs 12V AC or 12V DC circumventing the regulator.
I'll PM about the miniDSP.
Abs
The relays are $5.00 each (two of) and the rest of the bits are about five to seven dollars, depending on where you get them but you may have most of them anyway. They are common parts.. I can do a PCB for the relays for you (just got to find the etchant).
I must admit the $5 kit above seems a bargain but how would you power it? It needs 12V AC or 12V DC circumventing the regulator.
I'll PM about the miniDSP.
Abs
Hi Guys,
I'm trying to use this module:
UPC1237 Speaker Protection Board Double Track Compatible with The BTL Protection | eBay
for this amp:
http://bit.ly/1xdxb48
During module test I applied voltage (9V DC) to Input terminals and module do nothing, and relays stays on ;-(.
When I connect testing voltage (9VDC) between GND and any speakers terminal (in or out) module disconnecting relays immediately.
As far I know in circlotron both terminals are "hot" and they can not be attached to GND ;-(.
In this case seems that protection module needs reference to GND to work properly..
Could any one could help me and give me a hint how to connect speakers to this module ?
THX for any help..
Regards,
Artur
I'm trying to use this module:
UPC1237 Speaker Protection Board Double Track Compatible with The BTL Protection | eBay
for this amp:
http://bit.ly/1xdxb48
During module test I applied voltage (9V DC) to Input terminals and module do nothing, and relays stays on ;-(.
When I connect testing voltage (9VDC) between GND and any speakers terminal (in or out) module disconnecting relays immediately.
As far I know in circlotron both terminals are "hot" and they can not be attached to GND ;-(.
In this case seems that protection module needs reference to GND to work properly..
Could any one could help me and give me a hint how to connect speakers to this module ?
THX for any help..
Regards,
Artur
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