Hi All,
Have a simple transmitting circuit.**broken link removed**
refer link for circuit and explanation:
http://generous.boy.googlepages.com/transmittingcircuit
Note: Vcc= 10V
Decided to add a reserve capacitor C1 to supply the LED. To prevent the supply from injected with noise when it see's a big gulp of supply being eaten by the LED.
The resistor R1 just provides some resistance, so that the LED sources the supply from the easiest path i.e. from the capacitor.
Question
What will decide the value of C1 and R1? I randomly chose the 47uf since it seemed a standard value.
- after looking throught a bit : delta v= (i *t)/C correct??
i is the current across the LED = 1 A
t = on period = 10us
but what would delta v be? 10V- vdrop across LED = 9.8V??
Have a simple transmitting circuit.**broken link removed**
refer link for circuit and explanation:
http://generous.boy.googlepages.com/transmittingcircuit
Note: Vcc= 10V
Decided to add a reserve capacitor C1 to supply the LED. To prevent the supply from injected with noise when it see's a big gulp of supply being eaten by the LED.
The resistor R1 just provides some resistance, so that the LED sources the supply from the easiest path i.e. from the capacitor.
Question
What will decide the value of C1 and R1? I randomly chose the 47uf since it seemed a standard value.
- after looking throught a bit : delta v= (i *t)/C correct??
i is the current across the LED = 1 A
t = on period = 10us
but what would delta v be? 10V- vdrop across LED = 9.8V??