Low voltage Relay

[mbyamukama]

Hello all. I am working on an circuit in which I require a switch to arm if the voltage between the terminals of the load is less than -200mV (e.g, switch is armed if V=-400mV but disarms if V=-100mV) so that I can send current to the load from a battery source. I am thinking that a relay with such low specs would but an not sure where to look. any help will be really appreciated.

 

[poor mystic]

Hi mbyamukama
I suggest analog comparators (not op-amps wired as comparators) to drive logic and a power transistor at the output of the logic to drive an ordinary relay.

 

[mbyamukama]

Hi poor mystic. Thank you. I got much more convenient solution. I will amplify the voltage using an opAmp and use the amplified voltage to trigger a Solid State relay. The relays control voltage is 3-10V and its acceptable load parameters are 0-100V, 10A max. This is just perfect for my case. Check out the CMX100D10 at
http://uk.rs-online.com/web/search/searchBrowseAction.html?method=getProduct&R=7125985