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1answer
42 views

Voltage in a Y-Δ transform

I'm looking for a way to solve the following circuit Without the voltage sources on the circuit, I would be using a simple Y-Δ transform. But I'm not sure how I should proceed with them on. Which ...
-1
votes
1answer
72 views

6VDC power sources for momentary switch

I recently asked this question where I'm trying to wire up this momentary switch to my Raspberry Pi 1 Model A such that: The switch is normally open; and When pushed down: it closes the circuit, ...
0
votes
1answer
52 views

DC power filter curicut

I have a problem in powering my wireless Panasonic landline telephone. It works on 9v power with a transformer that work on 220v and gives as output 9v and it works fine with this way. I try to power ...
0
votes
3answers
2k views

How to run 5v relay on 9v?

I have a 5v(coil) dpdt relay. Running it with 9v is safe or not? How can i reduce the voltage from 9v to 5v ? How much resistor i need ?(i do no want to use voltage regulator pls)
0
votes
1answer
715 views

Short circuit protection for my voltage source

Can someone suggest me some short circuit protection schematic? I have 12V DC source (1.2A max. output current) and I will use it in some amateur electronics projects, but I would like to add some ...