Recent content by tefavolc

can anyone provide me with a site explaning how to deal with battery in circuit ? for example when i use AA battery what max. current i can drive from it ?

thnx for the help

i use one transformer 12-220 and obtain 180 volt at its secoundry , i need to connect it to another transformer to step it up agine , when i connect its secoundry coil direct to the primary of the secound trans, it doesn't work i guss . any idea on how to connect it right ?

how can i connect 2 transformers in series and what is there equivlent turn ratio ?

thnx for replaying

how can i know the current gain of transistor fom its data sheet?? when i open a datasheet for a certain transistor i find a relation between Ic and Hfe at a certain Vce (ex Vce=4 volt), did this relation only correct at that Vce ? and if its that how can i calculate the Hfe for a certain Ic at...

Here u are

thnx again vk6kro for making thing clearer , i want Vce to be greater than 0.3 coz i want to operate the transistor in the active mode not the saturation one.

skepitic u said that by putting emitter resistor we can establish stable gain , would you show me that by equations ? and i ve another question ,, i know that current gain hfe is dependent on Ic, then as iam going to built a circuit i ve to chose Ic and look at the graph for Ic vs hfe and find...

thnx vk6kro really apprieciat your efforts , by the way I am studying electrical engineering but iam still a beginer

bob s thnx for replaying but i really want to know that's wrong wiz my connection

i was try to built a simple transistor circut , i chose Ic=0.5 mA , i used s8050 transistor , by looking at its datasheet i found that i ve to make Vbe=0.56 V and Vce= 1 V in order to obtain Ic=0.5mA.i used power supply with output 12 volt and max current 9 A . by using 2 plots 10k and 200k i...

thnx all for help

i need link for the power or the maximum current for dc battery 9 and 1.5 voltage ..if anyone know please share it ??

im using for 9 volt source an (9volt battry panasonic)...i will not connect spceific thing just test the output on variable resistance to see the output power,, i just want to built that devise for knowlage and experince ,, and later i can connect it to some devise which need high input...