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5answers
73 views

Proper name for “a switch-over time-delay relay”

I have a joystick wired to a relay that spins a motor either one way or the other way. The problem is that I need to enforce a small "dead-time" when the user pushes the joystick quickly from one ...
-1
votes
3answers
76 views

Reverse Current Protection using two PMOS in back to back configuration

I am working on a circuit that needs reverse current protection. Back to back mosfet configuration has been suggested by many people, and it seems to make sense at the beginning. But after I built my ...
0
votes
1answer
76 views

Where would Icbo flow through and would it cause thermal runaway?

I was reading this page about thermal run away. And it mentions: Due to increase in the temperature of collector junction, Ico will increase, Vbe will decrease. But for Ico to increase Ic and ...
0
votes
1answer
173 views

Diode reverse current

If I apply an current source into the the cathode of a diode (current flow into cathode), what can possibly happen to the diode. For the cuicuit below, when the FET is OFF, how does the battery ...
1
vote
0answers
1k views

How can I add N channel MOSFET for reverse polarity protection?

I would like to add a reverse polarity protection circuit to protect my circuit from reverse polarity. I tried to use following circuit at this link With NMOS FET, I have a little problem. If the ...
0
votes
0answers
30 views

Simple Animatronic - slow repeating/reciprocal motion for a window display

I am trying to rig a contraption to pull a model hot air balloon back and forth along a curved horizontal track. Its motion is both horizontal (6’) and vertical. I have built the track and rigged the ...
0
votes
0answers
730 views

Inverse active mode of BJT

Here is my task: Find input voltage Vul and base voltage of T1, so that T1 enters full reverse active mode. Explain. Voltage base-emitter of BJT (when it conducts) is 0.7V, voltage base-emitter in ...
-4
votes
0answers
38 views

peak reverse recovery current

What would be an appropriate peak reverse recovery current to choose the for diode if I-L is a constant 50A? I am not so interested in an exact number. I'm just curious about what factors it would be ...