I Understand now.. Can I use +12V for protection (NE555) from TIP41C, and for gnd use Ucc-. Then I conect pin 3 of NE555 directly to SD pin. I forgot that needed +12V ref to Ucc- not to GND
Because lower disipation of shunt resistor, I will use transistor instead of optocoupler. Now voltage drop is 0.7V
In simulator it works (schematic like Luka's)
Rsens = 0.7V / (Ucc/2Rload*2*sqrt2)
Rsens = 1.4Rload*sqrt2 / Ucc (1.4~sqrt2) =>
Rsens = sqrt2*Rload*sqrt2 / Ucc
finaly
Rsens = 2Rload/Ucc (=) Ohms
In simulator it works (schematic like Luka's)
Rsens = 0.7V / (Ucc/2Rload*2*sqrt2)
Rsens = 1.4Rload*sqrt2 / Ucc (1.4~sqrt2) =>
Rsens = sqrt2*Rload*sqrt2 / Ucc
finaly
Rsens = 2Rload/Ucc (=) Ohms
Attachments
I made a mistake regarding my wire/inductor protection...using an inductor with a core with value>1uH is not recomanded because it will be too sensitive to noise...🙁
Aditional residual filtering should be made elsewhere...thanks Pafi for clearing that up..🙂...so a low inductance(<1uh) wound wire is recomanded..
Dzony988 use optocupler/level shifter for ir2110 sd pin and faster detection if you love your transistors..😀
Aditional residual filtering should be made elsewhere...thanks Pafi for clearing that up..🙂...so a low inductance(<1uh) wound wire is recomanded..
Dzony988 use optocupler/level shifter for ir2110 sd pin and faster detection if you love your transistors..😀
With optovoupler I need 1.5V drop, cant 1V like I think. For 1.5V disipation at shunt resisot is to big, and with mpsa42 can be fast too (i think) because Luka use it in his amp. This is his protection
I said optocoupler for comunication with ir2110...
With optocoupler for the detector yes you will have 1.0-1.1 volt drop..if you decide to use my protection i thing you will get away with 400mv drop but i do not think you will have the pacience to sort resistors and obtain minimum error...
With optocoupler for the detector yes you will have 1.0-1.1 volt drop..if you decide to use my protection i thing you will get away with 400mv drop but i do not think you will have the pacience to sort resistors and obtain minimum error...
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I use LiveWire simulator. Its good only for simple curcuits. And when I whant to capture, zooming on screen and press CTRL+PRTSC. Then paste to paint and save like .png document 🙂
Connect directly to sd pin from ne555,optocoupler is not needed now since you referenced protection circuitry to negativ rail..it seems i skipped your schematic before this last one..i am sorry🙁.
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Do anyone have curcuit of input signal limiter but without optical elements. I try in simulator many of curcuit from google, but it doesnt work or has lot of distorsion.
something good what you used?
Reason why without opto elemets is because I dont like it and bigger rison is that I can only find photo resistor LDR07
Regards
something good what you used?
Reason why without opto elemets is because I dont like it and bigger rison is that I can only find photo resistor LDR07
Regards
You can use a led-photo resistor combination...
Have you simulated this? Fast Audio Peak Limiter (figure 2)
Have you simulated this? Fast Audio Peak Limiter (figure 2)
Dzony988 you will have saome distorsions when limiting starts to work..that is inevitable..have you tried my schematic also?
where is your schematic? 🙂
NMOS schemtic start with distorzion on 300mV AC and go up to 8%. Maybe something can be fone with optocoupler
NMOS schemtic start with distorzion on 300mV AC and go up to 8%. Maybe something can be fone with optocoupler