Tagged Questions
2
votes
1answer
358 views
Is pinch off voltage of JFET constant?
The drain current is related to gate to source voltage by the following equation:
\$I_d = I_{dss} (1 - \frac{V_{gs}}{V_p})^2\$
Now, with changing \$V_{gs}\$, I think \$V_p\$ also changes. I am ...
5
votes
3answers
3k views
Reading and understanding electrical specs on laptop AC adapters
My Dell laptop comes with an AC adapter with the following specs:
65 W
Input AC: 100 - 240 V, ~1.5 A, 50 - 60 Hz
Output DC: 19.5 V, 3.34 A
My HP laptop:
...
5
votes
2answers
694 views
Programmable current source
I need to build a programmable current source from a 8051 microcontroller.
It needs an output current from 0 to 10mA maximun.
How do i go about doing this? what circuits do i need to build?
I was ...
