modified 7 years ago

First ever transistor circuit

01:22:05

Slightly confused. The 1v circuit isn't floating sperate from the 5v circuit it would seem.

published 7 years ago

hurz

7 years ago

815mV are much enough to not go into saturation. But you need to turn 5V supply and LEDs 180° to be in common emitter circuit. The resistor must be <=150 ohm for 2V LEDs @20mA, check this http://everycircuit.com/circuit/4561597841539072

mikenco

7 years ago

Thank you for taking time to explain this. It's late here now, I will explore this tomorrow evening.

mikenco

7 years ago

Made the changes.. I can understand why you said to reverse the leds and the psu now.

BillyT

7 years ago

Here is another circuit, play around with it and see if you can work out what is happening and why. : http://everycircuit.com/circuit/5200201295069184

hurz

7 years ago

Thats collaborative learning! Thanx @BillyT, some trolls here on EC should take this as a reference thread!

mikenco

7 years ago

BillyT did your comment and test dissapear?

BillyT

7 years ago

No it's still there, just go to the circuit, alter resistors while watching voltages and currents.

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