Customer:
I saw in the comments that I can send questions about unclear points to this email address. At 1:55 you said that if we apply a smaller current to the base of an NPN transistor, it allows a larger current to flow from the collector to the emitter, and at 3:39 you said the same thing for PNP. I’m confused - which transistor type is this actually true for?
Original message (Croatian)
vidio sam u komentarima da se moze na ovu e-mail adresu poslati upit u vezi nejasnoca, na 1:55 ste rekli da ako na bazu npn tranzisora dovedemo manju struju da onda propusta vecu struju sa colektora na emiter, a na 3:39 ste rekli to isto za pnp. Sad me zanima sta je tocno ?
Tj. za koji tranzitor je tocno da za manju struju na bazi propusta vecu struju sa colektora na emiter?
Originally submitted via email support on 29 January 2018. Migrated to the forum for community visibility.
Soldered Support:
The transistors in the video are explained at a very high level to make it as simple as possible to understand, so some things are oversimplified.
Generally, for both transistor types, a small current at the base results in a larger current flowing in the collector → emitter direction, or in the reverse direction for the other type of transistor.
The collector current (Ic) depends on the base current (Ib) and the transistor’s gain (beta, which is different for each transistor), with the relationship:
Ic = Ib * beta
with Ic having a maximum value, which is also different for each transistor.
Original message (Croatian)
hvala na javljanju. Tranzistori u videu su objašnjeni na jako visokoj razini da bi bilo što jednovnije za shvatiti, pa su neke stvari previše pojednostavljene..
općenito, za oba tranzistora, mala struja na bazi će rezultirati većom strujom koja prolazi u smjeru kolektor → emiter ili obnutro za drugi tip tranzistora.
Ic(struja koja prolazi kroz kolektor) ovisi o struji na bazi(Ib) te pojačanju tranzistora(beta, svaki tranzistor ima drukčije) i to u relaciji:
Ic = Ib * beta
s time da Ic ima maksimum, koji je također različit za svaki tranzistor
nažalost nemamo neki online tutorijal za više o tranzistorima..