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2
votes
2answers
20 views

On/Off switch box

how do you make a simple On/Off switch box to start and stop a signal? I want to start and stop a drum beat via a foot switch and would like to know the components to build one.
1
vote
1answer
38 views

Measure battery voltage

For a LiPoly-accu driven device using the Olimexino-32u4 board (includes LiPoly charger) I want to measure the accu state (voltage?). How to measure the voltage without the need for a current ...
0
votes
0answers
39 views

Can bad Bypass diodes in solar panels cause drop in amperage? [closed]

I had 6 panels at home they worked well for a few days but today the amperage dropped suddenly the voltage is proper but can't get the right amperage from cells can a bad bypass diode cause this ...
1
vote
0answers
21 views

DSP for 200 MHz signal with ability to install linux and ethernet support [closed]

Suppose we have 200 MHz signal, that we need to process and send the results of the processing over the Ethernet. I know basics about DSP and FPGA. I've worked with some cortex m4 microcontrollers ...
6
votes
3answers
140 views

What Regulatory Requirements are Really Necessary for Sale in the USA?

I understand that unless you fall into some specific product categories that are exempt from FCC regulations, electronic products sold in the US are legally required to meet FCC EMC limits. However, ...
2
votes
3answers
109 views

Is single ended amplifier a subset of differential amplifier?

The reason I'm asking this is that when I read about CMRR issue in amplifiers I only see differential amplifiers as if it is only a diff. amp. issue. But isn't a single ended amplifier also a ...