Does anyone know of a currently available soft start and dc protection PCB. There are hundreds of threads and many seperate available pcb's/kits on eBay but I would rather a single pcb, from a DIYA member if possible. If not I may mke a few up.
Cheers
Cheers
Hi maybe the one I made is not realy elegant but work fine.
I am using a transistor flip flop to start up and then 555 to swicth on a relay
relay closed by pass thermistor.
DC protection and speaker disconect with NTE 7100 works prety well
saved my Polks a cople of times while I was messing with bias and AC Loss speaker disconect
this avoids tump at start up and power down.
I got no drawings made at present but should be able to post tonight.
I am using a transistor flip flop to start up and then 555 to swicth on a relay
relay closed by pass thermistor.
DC protection and speaker disconect with NTE 7100 works prety well
saved my Polks a cople of times while I was messing with bias and AC Loss speaker disconect
this avoids tump at start up and power down.
I got no drawings made at present but should be able to post tonight.
I use a PIC micro to look after dc detect and power up delay.
If it see DC for 500mS it shuts off the relay.
If it see DC for 500mS it shuts off the relay.
Would this thermistors be suitable, it is of CL-60 type.
GE | Passives | Resistors | Thermistor | |CL-60
GE | Passives | Resistors | Thermistor | |CL-60
The General Electric co. is the only one who makes the CL60, for decades.
CL60 is CL60.
You can use other thermistor types, by other manufacturers, then they have a different name.
Save ?
CL60 is CL60.
You can use other thermistor types, by other manufacturers, then they have a different name.
Save ?
go to amps lab u can find there soft start and dc protection.. I already made those circuits and its fine..
Thankyou, that is what I was after.
Not worried about saving a few$$, the above are available and can be posted for a reasonable rate.
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