All Questions
17
questions
0
votes
1
answer
95
views
What is the "best" way to make a diy 7v rechargeable battery?
I have a device (the wii "sensor" bar, basically an IR LED array) that the literature says takes 7v. I can't find any battery offerings that come in 7v, but many that are 3.7v, so I am stuck ...
- 141
0
votes
1
answer
44
views
Combination of step up and step down feasible?
I have a model aircraft on which I am installing a LED kit of the same manufacturer. The EDF jet is powered by a 6s Lipo (22.2V nominal). The LED kit connects to the balancer plug of the battery and ...
- 1
0
votes
1
answer
97
views
Calculation of step-up / step-down output voltage
I am trying to build a step-up and step-down circuit from a DC-DC converter IC.
This is from the datasheet:
I have two questions in relation to this:
The value of the resistor in the red box. It ...
- 1,369
0
votes
3
answers
249
views
Can very high voltage and very low current AC produce strong magnetic flux in the coil?
I have done some research and also conducted some experiments and found that the magnetic flux in a transformer or a coil mainly depends on the number of turns and current flowing in it and not the ...
- 73
0
votes
1
answer
36
views
Where does the Step-Down Convertor used as compare to RECOM DC/DC converter?
I am reading Step-Down converter and given the circuit below, which is a step down converter. It consists of a MOSFET, inductor, diode, capacitor
And if I compare it with RECOM component DC/DC ...
- 103
4
votes
0
answers
240
views
Can this Raspberry Pi UPS circuit work?
I created following UPS circuit to shutdown my Raspberry Pi 3A+ properly:
I would really appreciate if somebody can review my circuit. I know it's a little bit hard to read, but I'm sorry. I'm a ...
- 41
-1
votes
1
answer
165
views
Which voltage converter will work for my amplifier? [closed]
I recently moved to France from the United States. I am in the market for a voltage converter for my markbass amplifier:
From the little research I have done, there seems to be a general consensus ...
0
votes
0
answers
86
views
DC to DC converter options
I'm admitting here that I'm a little out of my element, so take that into consideration.
I am working on a project that combines a few different electrical devices that use different DC power sources. ...
-1
votes
1
answer
80
views
I designed a circuit to receive multiple AC voltages at the input and constant voltage at the output, but I wonder if the circuit makes any sense
I wonder if this circuit has any meaning and if it will work as I expect.
I would like to know before I build it, due to lack of time.
What I want from this circuit is to give motorcycle lamps the ...
user270262
1
vote
0
answers
135
views
How to bypass step-up voltage converter?
I bought this great solar panel unit on amazon that has lithium batteries, 12v input and 12v output. I use it to power a 5v ESP8266 and I have a step down voltage converter from 12v to 5v on my end ...
- 13
0
votes
0
answers
34
views
Constant Voltage Power Supply
I’m working on a project were I need to power to some 24V 4-20mA sensors, a 3.3V ESP32 and a 5V SIM808 module.
To accomplish this I’m using a step-down buck converter to reduce a 12V electrolytic ...
- 11
-1
votes
2
answers
185
views
Relocation US to Germany: step-down transformer for TV, AVR, LED lights and other devices? [closed]
I hope this is the right place to ask this: I am relocating from the US (110V 60Hz) to Germany (240V 50Hz) and want to bring some of my electronic devices. It seems worth the hassle in my case (not ...
- 101
0
votes
0
answers
66
views
Use step-down 1.3-35V converter together with a step-up 5-24V converter
I want to build a variable power supply.
I am using a computer power supply and I want to make the 5 volt 20A output variable.
I found an online website that has all the components that I need. ...
0
votes
2
answers
350
views
When to use step up and step down transformer
Well I once saw a video in which a guy made a spot welder using a step down transformer and in another video I saw someone make arcer using a step up transformer. Why using a step up to jump arcs and ...
- 165
2
votes
1
answer
651
views
TPS63070 buck-boost not bucking or boosting correctly
Can someone check my layout? I am using TPS63070 buck-boost regulator and I would like to get 4.7 V output at TP12 but, I am getting 11.5 V which is wrong and I don't know why.
Base on the Datasheet ...
- 49