Ricardo
If they can achieve more Vdrop than your current Leds, yes the total current will rise when keeping same R1. I see they state Vf 2.1. If they are also typical 10-20mA they are common. I see they are very expensive though. A bag of leds in nice price from some electronics shop does the job most of the times. Especially if they allow you to test one from the bag.
If they can achieve more Vdrop than your current Leds, yes the total current will rise when keeping same R1. I see they state Vf 2.1. If they are also typical 10-20mA they are common. I see they are very expensive though. A bag of leds in nice price from some electronics shop does the job most of the times. Especially if they allow you to test one from the bag.
Ricardo
If they can achieve more Vdrop than your current Leds, yes the total current will rise when keeping same R1. I see they state Vf 2.1. If they are also typical 10-20mA they are common. I see they are very expensive though. A bag of leds in nice price from some electronics shop does the job most of the times. Especially if they allow you to test one from the bag.
In this case, Vf = 2,1 .... does it mean Vdrop should be 2,1V ?
In this case, Vf = 2,1 .... does it mean Vdrop should be 2,1V ?
The ones you linked are so. I predict 230mA or so with 10R R1.
RCruz said:In this case, Vf = 2,1 .... does it mean Vdrop should be 2,1V ?
Vf=Voltage Forvard, not Voltage Drop
Example: Connect 3V to LED pins. Voltage at pins will be 2.1V, this is Voltage Forvard.
Nice board !
Would you please post a schematic that goes with the board so we can all follow your work ?
Ricardo
Ok! you can see some image my friend make with Salas shunt low!
thank
Attachments
Quanghao, tell your friend to reduce the lentgh of the black cables connecting the shunt board to the Dac pcb to the bare minimum. Those cables must be very short if you want to get fully advantage of the very low output impedance of the power supply.
Ok! thank Massimo!
@RCruz
R1=10 Ohm, bypassed with 47 Ohm. Total resistance = 8.24 Ohm
Measure voltage drop across this paralleled resistor. Divide voltage with resistance to get current. For 250mA voltage drop should be approx. 2.06V
Parallel resistance Calculator
R1=10 Ohm, bypassed with 47 Ohm. Total resistance = 8.24 Ohm
Measure voltage drop across this paralleled resistor. Divide voltage with resistance to get current. For 250mA voltage drop should be approx. 2.06V
Parallel resistance Calculator
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