"Go back to bed" gadget
This circuit is live in Circuit Canvas. Open it to explore every part and wire, or make your own copy to change values, swap parts and build your own version. Free, right in your browser.
This is a gadget that notifies me whenever my daughter tries to sneak out of her room past bedtime. It's based off a standard 433MHz remote control and receiver unit that you can get on Amazon for a few dollars.
Check out the complete tutorial for more details.
"Go back to bed" gadget Schematic
Power the unit with a battery. Use P+ and P- wires to connect what you want to control. On the remote control, replace it's button with your micro switch.
"Go back to bed" gadget Parts List
How to Build the "Go back to bed" gadget
Here's how the connections look in real life. The microswitch is soldered onto the pads of the old remote control switch.
Make it your own
Every circuit here is a live project in Circuit Canvas, not just a picture. Copy this one and change a value, swap a part or move it to a stripboard: the schematic and the breadboard layout are linked, so a part added to one appears in the other.
Or start from a blank canvas and draw your own circuit, with thousands of ready-made parts.