Hi need some advice ,have a ACS 754 200A current sensor(hall) would like to measure up to +-200A dc but dont know if i will need some sort of current shunt in conjunction with the current sensor as i dont think the current sensor will be able to handle all the current on the bus bar ,i have seen images of the ACS being incorporated into a bus bar ( current divider ) but have no specs on the actual bus bar shunt or dimensions as i dont want the sensors current terminals burning off due do some high current short used in the crowbar protection circuit ..figure 4 is what im talking about ...

www.allegromicro.com/en/Products/Design/an/AN295045.pdf

I have sent a mail to allegro regarding the current divider ,but no reply from there side maybe someone can shed some light on this idea..

Many thanks

Hi Pete,I emailed you dont know if you received it .Let me know .... 

hi there

Im currently in mexico have just moved here ,but i do have family in london that could help out with a deposit if needed ...

I have been in the uk myself so i know how things work there .. how to get cash to friends and so forth ...

chat via a other meduim would be ideal if we could make some sort of easier contact 


await reply :-)

Hi to all programmers ,i am looking for someone that can do the programming  for my small project its for  personal use as some things are just to complex for me as i have just started with arduino and just have no time on my hands .Have a lcd connected to the arduino (2560 mega) with some sensors  and voltage measurments and few graphical displays,is any body willing to make a few pennies  ,write and test this code for me??

Would appreciate it

HI to all ..

I would like to get some advice on which micro controller to use (investigating arduino mega 2560) and with programming im new to all of this and just have a headache
from all the info i have been looking at ...This is a project for a power supply that has inrush current protection on the mains transformer as well as a crowbar circuit on the dc output.Fixed output voltage 13.8Vdc +- 120 A

1.Monitor Mains Ac input voltage (110 VAC)
2.Monitor power supply voltage output (Max 15vDC)
3.Monitor Dc current(Max 150A,75mV shunt available or current sensor ACSXXX)
4.Monitor Heatsink temperature only (Have thermal switch to trigger cooling fans /lm35/hall effect sensor)
* display on a 4 line display simultainiously...(128*64 blue lcd)

I have a status led which i would also like to incorporate (tricolour led ..RGB)
1.Trigger"Current inrush "(Green) latching input
2.Trigger  "Mains on"(Blue) latching input
3.Trigger  "Fault"(Red Flashing )latching input
As i am using a tricolour led to display the general status of the power supply i dont want the different triggers to display at the same time if one of the trigger input changes (in other words not have secondry colours only primary colours )

I would appreciate any advice on family of micro controllers ,type of sensors available and  especially the code  that needs to be compiled  .


Please help !!!

 



 

HI to all ..

I would like to get some advice on which micro controller to use and with programming im new to all of this and just have a headache
from all the info i have been looking at ...This is a project for a power supply that has inrush current protection on the mains transformer as well as a crowbar circuit on the dc output.Fixed output voltage 13.8Vdc +- 100 A

1.Monitor Mains Ac input voltage (110 VAC)
2.Monitor power supply voltage output (Max 15vDC)
3.Monitor Dc current(Max 100A,75mV shunt available)
4.Monitor Heatsink temperature only (Have thermal switch to trigger cooling fans )
* display on a 4 line display simultainiously...

I have a status led which i would also like to incorporate (tricolour led ..RGB)
1.Trigger"Current inrush "(Green) latching input
2.Trigger  "Mains on"(Blue) latching input
3.Trigger  "Fault"(Red Flashing )latching input
As i am using a tricolour led to display the general status of the power supply i dont want the different triggers to display at the same time if one of the trigger input changes (in other words have mixed colours on the led status light..like purple)

I would appreciate any advice on family of micro controllers and  especially the code  that needs to be compiled  .


Please help !!!