Can anyone point me to a magnetic key switch? So far my googling has been fruitless.
This is for elderly disabled people with limited dexterity. The idea is they walk up to the device they're turning on, stick the magnet on and that turns it on. Basically a magnetic reed switch would be fine, but it needs to have a strong enough magnet to hold the key there until the person removes it. It needs to handle 12v DC, and maybe 0.5A of current (enough to operate a relay), though more robust is fine too. One key can work for all switches, it's not a security device. I can make one, but I'm really hoping to find something off the shelf as we're going to need a bunch of them. Has anyone seen something like this?
This is for elderly disabled people with limited dexterity. The idea is they walk up to the device they're turning on, stick the magnet on and that turns it on. Basically a magnetic reed switch would be fine, but it needs to have a strong enough magnet to hold the key there until the person removes it. It needs to handle 12v DC, and maybe 0.5A of current (enough to operate a relay), though more robust is fine too. One key can work for all switches, it's not a security device. I can make one, but I'm really hoping to find something off the shelf as we're going to need a bunch of them. Has anyone seen something like this?