Linked Questions

3
votes
4answers
26k views

Voltage regulator too hot to touch [duplicate]

I'm working on an RGB LED project. I'm using this as the power supply: https://www.sparkfun.com/products/114 It uses an LM317 which according to the data sheet can supply up to 1.5A. The LED's I'm ...
3
votes
1answer
2k views

l7809cv voltage regulator: heat sink or not? [duplicate]

I'm using 9v regulator (l7809cv) with 12 1,5v AA batteries in series so that my application gets both 18v and 9v for my Arduino Uno r3 board. I've been running it for about 15min without any ...
0
votes
3answers
1k views

Battery current reduction [duplicate]

I have made this circuit: Now I am trying to use this circuit in my bike. My bike has a 12V 9amp battery and while charging (bike running), the voltage fluctuates from 12V to 20V. To power this ...
1
vote
1answer
966 views

Why is LM 317 regulator getting hot? [duplicate]

I have just made up a adjustable regulator circuit using the LM 317T, the input is approx 33 V, and output 16 V, but the LM 317T when cold regulates at 16 V, but once the LM 317T gets very hot the ...
-2
votes
1answer
1k views

Getting 5Volt DC from 12 Volt DC using LM7805 IC [duplicate]

Possible Duplicate: My linear voltage regulator is overheating very fast I have a task to develop a mobile charger from 12 Volt DC power, now i have decided to use LM7805 for that.... but my ...
1
vote
1answer
755 views

L705CV Voltage Regulator Overheating [duplicate]

The L805CV voltage regulator is capable of producing a consistent 5v 1.5A draw. I am creating a small raspberry pi case and have a 12v 3a power supply to accomplish the project. I am powering a 12v ...
-1
votes
1answer
564 views

LM337 negative voltage regulator gets very hot, is this normal? [duplicate]

I used the LM337 negative regulator to regulate a +12V from a PC power supply. And connected the GND to input and the +12 to ground of the circuit, and i got it work (i mean it's regulating the ...
0
votes
2answers
76 views

Over heated voltage regulator [duplicate]

I’m trying to build a 5V output @ 200mA. I have a full wave bridge rectifier attached to a transformer with a capacitor reservoir of 100uF, using a LM7805 voltage regulator and with a 0.1uF cap as ...
0
votes
1answer
116 views

heating problem - L7805C [duplicate]

I'm using a L7805C voltage regulator , to power an SMPS circuit. But its getting heated after 10 min or so , even if I've put a heat sync. SMPS IC is used to convert +5V to -9V.
-3
votes
1answer
138 views

32v to 12v regulator [duplicate]

I am trying to light up 12V LED from 32V comes from another board. I have used voltage regulator (LM7812), but the problem is the regulator heats up very quickly even when I use 12V as input rather ...
6
votes
6answers
2k views

Why voltage regulators instead of voltage dividers for supplying power to loads? [duplicate]

I have to supply 80 Raspberry Pi's with power, so I began looking into it and found a power supply of 12V 20A (might not be enough current to supply 10 Pi's that typically draw 1.5A - 2A though). ...
9
votes
3answers
5k views

How hot does a voltage regulator get?

Since I've always did electronics through my Arduino and I feel I'm pretty much a beginner, I've never used a voltage regulator before. I want to create this circuit, but I want to hide it in my ...
1
vote
2answers
36k views

Dropping 24V to 12V simply and efficiently

I have a 24V solar system, and I want to get only 12V from the DC output. Currently I am taking a wire from only 1 battery, but this causes unbalance in the batteries and I have to check it a lot and ...
3
votes
1answer
14k views

Clean 12v car power

I am looking to get a constant, clean 12V from my cars 12V line. I am wondering if all I am in need of to pull this off would be a simple 12V fixed regulator? The 12V would be hooked up to a pico ...
2
votes
3answers
6k views

Do I need a heatsink for my voltage regulator?

I use L7805CV voltage regulator (TO-220) to get 5 V from a Li-Po 7.4 V 2200 mAh battery. However, after a while, voltage regulator gets really hot. Current measurement showed 200 mA. P=I*V=0.2*(7.4-...

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