2newton

modified 7 years ago

PNP and NPN

263

03:52:17

Having two outputs using one square wave.... 

published 7 years ago

hurz

7 years ago

@2newton, two totaly different circuita which you cant use to compare. Left common collector as voltage follower, right common emitter, which you kill by much to high base current Vbe supposr to be below 1V in max condition for most transistors BJT

hurz

7 years ago

@kiani, you beautified the circuit but took over this horrible PNP circuit part, please check it and change that disaster, this for newbies eyes is a horror

sshsslfun

7 years ago

Let me get a go at solving this.

sshsslfun

7 years ago

http://everycircuit.com/circuit/5409390686109696

sshsslfun

7 years ago

I tried to make it efficient and work aswell. Took me some time to tweak the resistor values but finally got a reasonable efficiency of 98.4%. Pretty good right?

crake

7 years ago

http://everycircuit.com/circuit/6588031583387648

hurz

7 years ago

wow @crake against a kid. Anyway, @crake this is only half the truth. @sshsslfun, how do you measure efficiency in such a useless circuit? im afraid the efficient must be much lower.

kiani

7 years ago

I just wanted to draw his attention to the wsveforms he had not displayed,, in his circuit, while beautifing it. removed it, as it might have been misleading if he didn't notice..

kiani

7 years ago

@ssh....here i've beautified your mango and it winks now.....chk....http://everycircuit.com/circuit/5846229326757888

crake

7 years ago

This is simply a circuit and not "against a kid" or whatever that was supposed to mean/start: http://everycircuit.com/circuit/6588031583387648

hurz

7 years ago

and you were first, congrats

hurz

7 years ago

@sshsslfun, can you do for us all how you calculated efficency, for this kind of circuits its a bit strange but lets see whats your idea is behind, please !

hurz

7 years ago

i guess you compare the overall current with the LED current and ideal 100% this circuit would draw 20mA or zero, is it this what you do?

sshsslfun

7 years ago

Yep, I divided the current drawn by the LEDs by the current in. But I kinda realize now that it should be PowerUsedByLoad/PowerIn and not current making my previous statement void. Oof.

hurz

7 years ago

right, even if you make it a power 0.02A x 2V is 40mW light, you normaly do not calculate such an efficency for indicator lamps.

kiani

7 years ago

Good point,, what is the efficiency of a TV.

hurz

7 years ago

i guess "negative"

hurz

7 years ago

😵 at least for your eyes

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