Someone (cant remember who or which thread) was looking for something like this, wanted actual delay, not just soft start. Stumbled across this, maybe it would suit thier needs.
Velleman K4700U 2 Channel Loudspeaker Protection Kit | Arcade Electronics
I don't know if Velleman products are good or not, maybe?
This site is worth a look anyway, happy hunting.
Velleman K4700U 2 Channel Loudspeaker Protection Kit | Arcade Electronics
I don't know if Velleman products are good or not, maybe?
This site is worth a look anyway, happy hunting.
I have used a kit very similar to the one shown in the link. You need some skills at soldering, but not a big deal.
It worked perfectly. For the next project I will not hesitate to use it again. I resurrected a Kenwood KA-7100 .The former owner tried to fix the speaker protection section , but damaged several PCB tracks in the process.This kit was the perfect solution.
It worked perfectly. For the next project I will not hesitate to use it again. I resurrected a Kenwood KA-7100 .The former owner tried to fix the speaker protection section , but damaged several PCB tracks in the process.This kit was the perfect solution.
I designed my own speaker protector.
It has 4 second power up delay.
It also turns off the relay if DC is detected for 500mS or more.
I found I could use a small PIC micro to look at the amp output (via a resistor divider).
The PIC inputs change state at 2 volts so I used this as a comparator.
It needs two PIC inputs, one for each phase of the signal.
It has 4 second power up delay.
It also turns off the relay if DC is detected for 500mS or more.
I found I could use a small PIC micro to look at the amp output (via a resistor divider).
The PIC inputs change state at 2 volts so I used this as a comparator.
It needs two PIC inputs, one for each phase of the signal.
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