Questions tagged [nec]
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9 questions
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Does D78F9177 MCU support reading the device?
NEC D78F9177 (8-Bit Single-Chip Microcontroller)
Can someone specify, does this MCU support reading the device? It's not clear, does this particular MCU have built-in functions to disable flash memory ...
- 209
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Modeling a spinning dipole with NEC2/PyNEC
I am a physicist with essentially no RF experience, so apologies if this question is elementary. We are planning for a sounding rocket, equipped with a half-wavelength dipole, which will be ...
- 23
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Dealing with IEC and NEC wiring color code in the same equipment
I am dealing with IEC and NEC standards for wiring color codes.
For the first time, I have to integrate european (and UL certified) COTS products - power supplies - into a system for the US market. ...
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Why isn't this IR NEC signal being accepted by the receiving device?
I'm trying to transmit an IR NEC signal to a portable air conditioning unit. I have the remote control that came with the unit, and it appears to use the NEC IR protocol.
I've setup a receiving ...
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Patch into IR receiver output signal
I have a LED string lights that can be controlled with an IR remote (e.g. ON/OFF, blinking mode, brightness, etc.) and the circuit looks like this:
FYI the lights work like this: The U1 IC controls ...
- 209
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Why does the current carrying capability of a cable increase with temperature
I'm specifying cable for a VFD application and came across this table regarding NEC ampacities and corresponding cable size.
What I found interesting is that the ampacity increased with temperature ...
- 947
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NEC asic information from around 1990
I'm looking for datasheets with specification for the NEC ASIC/Gate Arrays from around 1990.
More preciselly, any information with specifications of their ASIC/Gate Array lines.
I would like to known ...
- 151
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Difference between phase and polarity?
Long story short, I did a bit of a career change, I'm now doing electrical engineering with an architecture firm instead of embedded systems. So I've jumped from the simple world of DC to the land of ...
- 429
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Transformer secondary conductor protection: how do NEC 240.21(C) and NEC 240.4(B) make sense together?
NEC 240.21 says all ungrounded circuit conductors require overcurrent protection, with a list of exceptions:
One of those exceptions is 240.21(C):
240.4(B) says that if you're under 800 amps, you can ...
- 17.9k