SneaKSz
Member
Hello , I'm new here at the forum but i"ve got some electronic skills. I've got some questions about charging a capacitor.
1)
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If we are using a 4V6 zener diode , the voltage on the emittor would be around 3.9V . So the capacitor would charge directly to this voltage?
( My answer is untill 3.9V directly because there is no resistor)
2)
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So the current trought the resistor R2 = 4.6+0.7 / 470 = 11mA. The capacitor will load lineair . But my question is untill wich voltage will it load?
( my answer is untill around VCC - UR2 , because then the voltage on the collector is almoust > then the emittor , so there will flow no current to the collector)
3)
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if i add a resistor in the collector branch , could I then manipulate the speed that the capacitor loads? But doesn"t there flow a constant current trough the resistor and the capacitor so it doenst matter?
Thanks for the support
1)
**broken link removed**
If we are using a 4V6 zener diode , the voltage on the emittor would be around 3.9V . So the capacitor would charge directly to this voltage?
( My answer is untill 3.9V directly because there is no resistor)
2)
**broken link removed**
So the current trought the resistor R2 = 4.6+0.7 / 470 = 11mA. The capacitor will load lineair . But my question is untill wich voltage will it load?
( my answer is untill around VCC - UR2 , because then the voltage on the collector is almoust > then the emittor , so there will flow no current to the collector)
3)
**broken link removed**
if i add a resistor in the collector branch , could I then manipulate the speed that the capacitor loads? But doesn"t there flow a constant current trough the resistor and the capacitor so it doenst matter?
Thanks for the support
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