Latching Relays
Posted: Mon Sep 15, 2014 5:55 pm
I'd like to suggest a product that you do not stock ... a latching relay (either bare THT, or SMD on a small proto board).
As an example, an AXICOM / TE Relay Products V23079-B1201-B301 / 3-1393788-3
5V coils (one to latch, one to unlatch), 28 mA on either coil, DPDT, contacts rated 2A@30V-DC, 4ms response time
(this is the THT version, but they make an equivalent SMD)
The voltage/current rating is well within the operating limit of any ATMega 5V cpu. There is also a 4V coil version, that should function at 3.3V
The nice part about this relay, is that once latched, it consumes no current until you decide to pulse the unlatch coil.
As an example, an AXICOM / TE Relay Products V23079-B1201-B301 / 3-1393788-3
5V coils (one to latch, one to unlatch), 28 mA on either coil, DPDT, contacts rated 2A@30V-DC, 4ms response time
(this is the THT version, but they make an equivalent SMD)
The voltage/current rating is well within the operating limit of any ATMega 5V cpu. There is also a 4V coil version, that should function at 3.3V
The nice part about this relay, is that once latched, it consumes no current until you decide to pulse the unlatch coil.