Eric Smith
  • Member for 7 years, 2 months
  • Last seen more than a month ago
  • Denver CO USA
How much current does a microSD card use?
6 votes

In early versions of the SD spec (e.g., version 2.00, from 2006), cards were allowed to draw up to 200mA. In newer standards, cards are allowed to draw more current than that, but only after they've ...

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Is it possible to overcome a transistor's current limit by running it at lower voltage?
5 votes

If it's rated for 800mA, that's at any voltage (within the rated voltage limits). There is of course a chance that any given 800mA-rated transistor may work for a while, or possibly even forever, at ...

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How does USB superspeed electrical signaling work?
3 votes

In the example waveforms you show, the voltages are at the pins of the chip, before the capacitive coupling. The transmitter has approximately 0.3V of DC bias because it runs on a positive voltage ...

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Induced EMF without motion?
Accepted answer
3 votes

What you've got is effectively a transformer, but with only one turn for your secondary winding. Transformers don't work with DC input or output, because you can't induce a DC current with a ...

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What is the name of a footprint that is designed to let you cut the trace between two nets?
2 votes

In the 1970s it was common for the pair of half-moon pads to be used for a normally-open jumper, and a "bow tie" for a normally closed jumper. I haven't seen the bow tie in anything recent; it seems ...

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History of the MSP430
Accepted answer
2 votes

There was a little-known predecessor to the MSP430 series in the early 1990s, which was the TSS400 "uPower Programmable High-Precision Sensor Signal Processor". It had only an 8-bit processor, and the ...

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Dropped Bluetooth Connection While Charging through Solar
1 votes

A USB device requires that the input voltage be 5V (4.40-5.25V). If the voltage is nonzero but outside that range, the device may malfunction or be damaged; certainly it can't be expected to charge ...

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Looking at a RS485 signal with an ocilloscope
1 votes

Depending on the nature of the data being transferred, you might need to set the input coupling to DC for good results. Also make sure you're not using the digital filter, or have it set to LPF at a ...

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In VHDL, does having large bus input to component take extra resources?
0 votes

[Competely rewritten answer, because I misunderstood the question.] From a synthesis point of view, a signal that is an array is equivalent to a bunch of separate signals for each element. Synthesis ...

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Need for edge triggered versions other than master slave
0 votes

A conventional J-K master-slave flip-flop is not edge-triggered, because while the clock input is high, pulses on the J or K inputs will affect the master, and can affect the Q (and not-Q) state that ...

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USB C Powering over VCONN with no VBUS
0 votes

Normal USB devices are not allowed to be powered by VCONN. The only VCONN-powered accessories that are allowed are direct-attach Alternate-Mode UFPs. If the device doesn't negotiate an Alternate Mode, ...

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