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Need help in project involving microcontroller

Question asked by mrexp21 in #Coffee Room on Sep 12, 2013
mrexp21 路 Sep 12, 2013

I'm currently working on a project which requires the usage of microcontroller and I need help.

The project's objective is to read current(ampere) from vehicle electrical system and activates relay under certain current(ampere) range. For example, if the system reads current(ampere) below 1A, it will activates the relay. If the system read the current(ampere) above 1A, it will deactivates the relay.

My idea is; The flow of the system will start from current(ampere) reading gauge. The current(ampere) reading from the gauge will received by microcontroller. The microcontroller acts to determine the current(ampere) range to activate and deactivates the relay. This system contains 3 device to operate, reading gauge, microcontroller, relay.

My question is; 1) Is the idea above possible ? 2) If the idea is possible, how microcontroller will read the current(ampere) value from the gauge (input for microcontroller) ? 3) Is there any product which contains all the function of these 3 devices and programmable ? Posted in: #Coffee Room
Hari Prasath
Hari Prasath 路 Sep 12, 2013
Rank D2 - MASTER
Yes your IDEA is Possible馃憤
Micro-controllers don鈥檛 have specific ports for measuring currents, but they have ADC through which you can measure analog voltages to a certain range.馃榿
I'm not very sure about the readily available product. Try in your local automobile market. 馃様
I think you are complicating by using a MC. If activating a relay is your only application i suggest you to search for some current sensing relays and try using it.馃槢

Dear CEans- Correct me if i'm wrong.馃槝
Jeffrey Arulraj
Jeffrey Arulraj 路 Sep 12, 2013
Rank A2 - PRO
Use I to V convertors and then drive your micro controller

And as @deal2die said Your idea is really feasible
arunchary 路 Sep 12, 2013
Rank C1 - EXPERT
Good thought check for Texas site where they describes the special controllers for Current and Voltage measuring....it can be implemented already they are available in market for automation concepts....
yogi.bharadwaj 路 Oct 3, 2013
Rank C2 - EXPERT
its possible try to use a device for current measurement and then interface it with microcontroller and then you can control any device by the program in microcontroller but it totally depends on you that which interface you uses to connect other devices with the micro controller. keep trying everything is possible nothing is impossible .so don't give up and keep going,
Pulkit goel
Pulkit goel 路 Mar 19, 2020

Yes , it is possible . In fact in one of my project I have already send my current value on serve in ampere . In market there is a current sensor named la25-p this is a hall effect sensor it gives you current as for 25 A output of sensor is 5v which can be used with your microcontroller 聽 . For more details you can contact me I will help you in your project my contact no. 聽8218065178

Kaustubh Katdare
Kaustubh Katdare 路 Mar 19, 2020
Rank A1 - PRO

Pulkit - you should upload your project to our projects bank. Give it a try: Latest Engineering Projects With Abstract | CrazyEngineers

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