All Questions
Tagged with 7805 transistors
4
questions
2
votes
1
answer
889
views
Current-limit circuit for 78XX voltage regulators
I need to find the value of Rsc and R1 in the following circuit:
In this circuit, Q1 is the high-current pass transistor. Its emitter-to-base resistor has been chosen to turn it on at a given load ...
4
votes
2
answers
2k
views
2N2222 experiment is indicating incorrect gains
Okay, so I put a 20kΩ resistor between a 5V supply and the base of a 2N2222 with the collector connected directly to the 5V rail and emitter to ground. What I'd expect is that, roughly, 220μA (i.e. (...
- 793
0
votes
1
answer
80
views
Circuits And Voltage [closed]
simulate this circuit – Schematic created using CircuitLab
Please help.... I have an input of 7.5V but when it goes out of the circuit the voltage drops in 2.5V but i want 5V of output voltage ...
3
votes
2
answers
1k
views
Simple electrical circuit won't work
Simple NPN switching circuit to open a relay circuit, first NPN switching part didn't want to work (3rd PCB and endless times of trying).
Circuit wizard diagrams, I split its first part to figure out ...
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