Questions tagged [hot]

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74 views

BLDC 3phase motor. The resistor 5W 0.1 ohm to ground very hot when motor working at 250Hz

Any one help me on this my issuse. I have a BLDC 3 phase motor controler similar to this Schem here encloses. When the motor working at 150Hz everything is ok. But if it is works at 250Hz then the ...
1
vote
1answer
164 views

LTC3780 DC-DC 5-32V converter: suddenly fault and hot

I have planed to build a variable voltage DC power supply based on LTC3780 DC-DC 5-32V converter. I guess you are familiar with the converter, but I am attaching and image for illustration. I used ...
0
votes
1answer
48 views

12V lighted rocker switch getting hot even without load

Is it normal that 12v lighted rocker switches get hot even when the load is not connected? Attached is the schematic and the PCB layout for such switch: https://lcsc.com/product-detail/Rocker-...
2
votes
5answers
3k views

LM7805 heating up

I maked a schematic for trigger a siren 12v by a signal from Raspberry Pi (GPIO18 PWM 3.3V). All the circuit is powered by a power source of 12v 15A (see the image below). SCHEMATIC UPDATED: It's ...
0
votes
1answer
112 views

3-way solenoid valve gets hot

I have this Bosch 3-way valve that I use in a hydronic system. If I run 12V to energize the valve, it gets very HOT! Is that normal with such valves?
0
votes
1answer
67 views

lm35 Temperature Readings are not right after sealing with Hot-melt adhesive (How mush has it Soldering max Temp toleration ?)

I need to seal the LM35 temp sensor so, I used this device for sealing it: The code I have used are: ...
0
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0answers
47 views

Can a bad cell cause excessive heat in charging circuit?

Something I have noticed and am curious of. I had a cases where a lithium ion cell, is bad or dead and it seems to cause overheating in the IC chip on the charging circuit Today I was having issues ...
3
votes
3answers
2k views

MT3608 gets very hot only handle 1A

In the datasheet they mention the MT3608 can handle up to 2A however in some stress tests with a load tester it gets already very hot at 1A. It is so hot, it is impossible to touch the board, all ...
0
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2answers
412 views

How to regulate voltage of transformer output for nichrome wire

I have a basic CNC machine for cutting EPS foam which uses about 9.5in/23.5cm long straight 28 gauge Nichrome wire as the cutting element. The nichrome wire is powered independently with a 220V-36V 5A ...
6
votes
2answers
2k views

using plumber's copper solder as a “solder paste” for SMD components

Can I ? :D It is what I currently have plenty of lying around and, well... it says S-Sn97-Cu3 at composition If not, could I use regular solder wire, coat the SMT ...
0
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2answers
643 views

AC Light Bulb Fade Circuit - Resistors Getting Hot!

I'm building a circuit to slowly fade in (when switched on) and slowly fade out (when turned off) two LED bulbs. The circuit works, but the two 100 Ohm resistors (see picture) are getting very hot (...
0
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2answers
110 views

Share same input with 2 different 32AVR Microcontroller

I'm developing a circuit with two warm-redundant micro-controllers. Each uC has to read I2C, analog and digital signals from the rest of the circuit. Should I route the signals directly to the two ...