Hi,
We are working on a project where accelerometor data from an arduino is used to turn off the power of a motorised wheelchair when the acceleration goes over a certain threshold.
The wheelchair runs off of two 12v batteries so we have a latching relay (https://uk.rs-online.com/web/p/latching-relays/6996020/) for use in power applications. We need it to work so that when the accelerometer data is above the threshold the relay switches turning the power off and stays latched in that position until a push button is pressed by the user to switch the relay again so the power will be connected again.
The arduino is an arduino 101.
Any help/circuit designs would be greatly appreciated.
emmaponting:
Hi,
We are working on a project where accelerometor data from an arduino is used to turn off the power of a motorised wheelchair when the acceleration goes over a certain threshold.
The wheelchair runs off of two 12v batteries so we have a latching relay (https://uk.rs-online.com/web/p/latching-relays/6996020/) for use in power applications. We need it to work so that when the accelerometer data is above the threshold the relay switches turning the power off and stays latched in that position until a push button is pressed by the user to switch the relay again so the power will be connected again.
The arduino is an arduino 101.
Any help/circuit designs would be greatly appreciated.
Better look carefully at the data sheet for that relay!!! All their current ratings are for AC. and then only for a resistive load. You are using DC and an inductive load ( motor). Furthermore, the coil current for switching is 40ma, so you will need a MOSFET to switch the current for each coil.
Paul