Every T minutes arduino is switched on for few seconds using the Relay. But relay is using quite amount of power. Because this relay is powered 24x7, it's power consumption really matters.
Timer is generating square pulsers. Every T minutes arduino is switched on for few seconds using the Relay. But relay is using quite amount of power. Because this relay is powered 24x7, it's power consumption really matters.
I'd recommend using a MOSFET for turning on and off your Arduino as they are pretty power efficient. I'd also recommend watching this video from GreatScott!
You could use a high side MOSFET switch.However, there is no need at all to turn on and off the power to an Arduino or to use the 555 timer IC. In sleep mode, power consumption of a "bare bones" Arduino is negligible, and it can wake itself using the watchdog timer to do something at any desired interval.
No, the relay is on for a few seconds every T minutes. The 555 is powered 24x7, so the firstidea I have is to change it for a CMOS 555 like the 7555 which use less current.You also need a freewheel diode across that relay winding to stop it frying the '555.The other approach is to make the Nano use sleepmode.
If the relay is really drawing power 24/7 then you have it wired up incorrectly. It should only need power for the few minutes that the Arduino is on....R
I am looking at a DC SSR I pulled from a junk box. Grayhill 70m-odc5. Will switch up to 60 volts DC at 3 amp. Has 1.5ma leakage, which a real relay will not have.Paul
The LCA717 looks like it might work. Those modules aren't talked about much, so there must be good reasons not to use them in other situations. The datasheet says it is intended for medical and aerospace applications, so they must be confident that it's reliable. 0.15 ohms is a rather high on-resistance, much more than a relay. But for just powering an Arduino, it's OK.