Richardcavell
Member
Hi, everyone. Please look at my schematic here.
1. How fast can that BC558 transistor switch on and off?
2. With the BC558 transistor, is the current that goes through E-C always a fixed multiple of the E-B current?
3. If 'yes' to question 2, does that mean that if I removed the resistors from the circuit, the LED would immediately burn out and my batteries would be drained, by the E-C current rapidly increasing?
4. (I know I've asked this before but I'm not understanding it) What does that 100k ohm resistor do? The circuit appears to work perfectly with that part of the circuit removed entirely. Does the base somehow 'store' electrical potential that needs to be drained? Is there a buzzword or a wikipedia article that I should know about?
1. How fast can that BC558 transistor switch on and off?
2. With the BC558 transistor, is the current that goes through E-C always a fixed multiple of the E-B current?
3. If 'yes' to question 2, does that mean that if I removed the resistors from the circuit, the LED would immediately burn out and my batteries would be drained, by the E-C current rapidly increasing?
4. (I know I've asked this before but I'm not understanding it) What does that 100k ohm resistor do? The circuit appears to work perfectly with that part of the circuit removed entirely. Does the base somehow 'store' electrical potential that needs to be drained? Is there a buzzword or a wikipedia article that I should know about?
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