Hi
Not sure if this is correct subforum, but, I have two questions and here they are...
I have a transformer from dead onkyo tx-nr414 that I want to reuse, now, it has 40/0/40 and 10/10 leads. From 40/0/40 Im going to power mosfets in half bridge and I want to use 10/10 for powering everything else. My question can I connect GND connected to center tap of 40/0/40 after rectification to GND that will be created after rectifying 10/10?
Second question is, I want to provide some protection to speakers and I can see onkyo has relays for that purpose but they are controlled from MCU, is there some standard way to provide overvoltage and overcurrent protection? Over voltage I know how to do but for overcurrent I would have to put some current sensing resistor in speaker path and Im not sure this is the correct way.
Thanks.
Not sure if this is correct subforum, but, I have two questions and here they are...
I have a transformer from dead onkyo tx-nr414 that I want to reuse, now, it has 40/0/40 and 10/10 leads. From 40/0/40 Im going to power mosfets in half bridge and I want to use 10/10 for powering everything else. My question can I connect GND connected to center tap of 40/0/40 after rectification to GND that will be created after rectifying 10/10?
Second question is, I want to provide some protection to speakers and I can see onkyo has relays for that purpose but they are controlled from MCU, is there some standard way to provide overvoltage and overcurrent protection? Over voltage I know how to do but for overcurrent I would have to put some current sensing resistor in speaker path and Im not sure this is the correct way.
Thanks.
The transformer windings are independent and don't reference ground in any way, so yes you can tie the 10/10 ground to the 0V of the 2x40V.
The 2nd question is a can of worms. There are many different solutions and quite a few projects for it on DIY audio.
The 2nd question is a can of worms. There are many different solutions and quite a few projects for it on DIY audio.