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Hi
I am not sure if I understand your question 100%, but yes, Ground potentials differ.
You always connect the Ground Crocodile clamp of your oscilloscope probe to the same circuit where you want to measure signals.
If you want to measure the voltage of a battery, you would connect the GND...
The tranzorb is there to dissipate any energy injected by surges, and also over-voltage protection.
This also sort of serves as polarity protection now that the polarity protection diode might have to be replaced.
Ferrite beads are mostly helpfull for high frequency signals as far as I know...
Hi Klaus
As far as I understand you can also "self-declare" that you are EMC compliant, right? I think in cases like this we try to only do BOM changes,
alternatively we only make very modest changes like changing to a footprint that accommodates the fix.
If we do update the PCB and not just...
There should actually be no wiring as the card plugs into a motherboard type of controller.
But for the test a 1m twisted cable was used from two batteries in series.
I focused on the layout near the switcher, didn't even think about conducted emissions! (First time noob here)
The connector...
Hi Guys
I recently had a product that I designed tested at an EMC lab and at first it failed the conducted emissions test.
The PCB is very size constrained and I am looking for the most cost and size effective solution that cures the problem.
I replaced the polarity protection diode D1 with...
re: Lead-Acid Battery Chargers - Choosing the Correct Battery Management/Charging System
Can you please elaborate or explain this part of your answer?
I do have a 3V3 net locally for the micro, but that TI IC can only operate from 5V.
That IC will use very little power, right?
Maybe I can...
Hi Guys
I am working on a project that is in essence a "smartish" power supply bus. The AC/DC is managed by an off the shelf PSU, so no real work there.
A microcontoller controls power to 4 sets of downlinks, controlled by FETs. If something goes faulty down the line I can switch off the...
Any idea what its purpose is? Maybe a picture of the entire PCB would help with a description of what product it is?
Is it near a power source? Near a microcontroller? Maybe a transceiver for comms? What I am trying to say is put the IC in context.
Hi Guys
I am having some trouble understanding Current Transfer Ratio for optocouplers.
I have a simple application where I activate a single channel transistor-output optocoupler.
I provide the LED side of the opto with, say, 10mA and that enables to transistor for the outside user to...
Hi
Search for a MOSFET driver with an enable pin.
You then use the Microcontroller to turn on the MOSFET Driver, which in turn turns on the MOSFET.
The MOSFET requires a larger charge to properly open than what the Micro can provide, that is why the MOSFET driver is used. Ensure that you have...
I dont understand, what do you have and what do you want to accomplish?
Do you want to use a 12V battery to power an AC circuit or where does the transformer come in?
Or do you want the transformer to charge the battery?
The schematic that you have attached takes 14V DC input,
then regulates...
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