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Do anyone have idea why the LIVE of the socket is connected to the reference ground inside the energy meter while the neutral is connected to the high voltage of the meter?
Please look at the schematics of the reference design from Microchip...
From a reference design, there is a 0.47μF capacitor following the LIVE of the power socket.
Its BOM suggests using a film capacitor (CAP .47UF 305VAC Lead Spacing). I want to know what would happen if I use a ceramic capacitor of the same value instead? Thanks!
I created a LDO circuit for MCU and other components with maximum current output 1000mA. However, when I add a Wifi Module with the voltage supply (3.3V) from the LDO circuit, the voltage at 3.3V drops to 1.9V. I find out that the insufficient current from the LDO should the problem. My idea to...
Yes. GNDA and GNDB are connected together by an inductor(ferrite bead), in order to eliminate high frequency noise and is requested by the energy-metering IC.
Thank you for you guys' comments.
Actually I am designing a Power Meter with RF sending data to other device.
My design is reference to Microchip's power meter reference design.
The link is: **broken link removed**
The schematic diagram above is one of the circuits.
For my whole design, please...
That J1 port is for troubleshooting. Once the 220V is supplied, the J1 should not be connected.
One of the solution is to replace the regulator. But I am thinking if there any way, such as increasing/decreasing capacitance, to obtain more current output?
I think I should increase the output current as much as possible in order to supply 3.3V at the output of the 3V3 LDO with the wifi module connected. Can you suggest a way to increase the voltage at the output of the 3V3 LDO?
I use two LDOs to obtain digital voltages. Finally I get 3.3V at the end.
However, when I connected something, such wifi module, which must be driven by 3.3V, the voltage at that terminal drops down to 1.9V.
I am beginner in electronics design. My only knowledge tells me I should add an extra...
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