hm_fa_da
Full Member level 5
Hi,
I am going to design a single phase meter ( using shunt as current sensor ) which uses switching power supply like this schematic :
https://media.digikey.com/photos/rdl/dak_14a_schematic.jpg
i know it has transformer, but i doubt about C5 !
my measurement circuit uses a shunt resistor as current sensor, so i have to connect L of 220V AC to ground of my circuit, like :
![shuntc.png shuntc.png](https://www.edaboard.com/data/attachments/56/56614-b7392ce11d4b07136620928c2452e770.jpg)
so the final schematic will be like :
![dak_14a_schematic.jpg dak_14a_schematic.jpg](https://www.edaboard.com/data/attachments/56/56615-c3ca2638e5dc26b67f5487b34aa81c8a.jpg)
in this condition as you see, there would be AC current on C5 ... ( half cycle )
would this make problem in circuit working ?!
is this a problem ?!!
can i remove C5 at all ? what happens if i Remove it ?
Thanks![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
I am going to design a single phase meter ( using shunt as current sensor ) which uses switching power supply like this schematic :
https://media.digikey.com/photos/rdl/dak_14a_schematic.jpg
i know it has transformer, but i doubt about C5 !
my measurement circuit uses a shunt resistor as current sensor, so i have to connect L of 220V AC to ground of my circuit, like :
![shuntc.png shuntc.png](https://www.edaboard.com/data/attachments/56/56614-b7392ce11d4b07136620928c2452e770.jpg)
so the final schematic will be like :
![dak_14a_schematic.jpg dak_14a_schematic.jpg](https://www.edaboard.com/data/attachments/56/56615-c3ca2638e5dc26b67f5487b34aa81c8a.jpg)
in this condition as you see, there would be AC current on C5 ... ( half cycle )
would this make problem in circuit working ?!
is this a problem ?!!
can i remove C5 at all ? what happens if i Remove it ?
Thanks