Automatically change the dark corner of the house to be brighter with LED. No AC main but can run with battery solar charger. Do not doubt that How does it work or is it easy? Let's learn.
All controller, motor speed driver,switches,timer,sensor,and more : Timer switches • DC motor speed control • Delay timers • Light switchs • SCR controls • Light dimmers • Infrared remote control system • and more…
See simple Infrared Intruder Alarm circuit. Even it is best. But it is a good teacher to learn electronics. Using infra-red system.
See: 555 PWM DC LED dimmer circuit in 12V source. For a lot of loads even control the speed motor. Nearly with loss and high performance
SEE DIY compressor time delay circuit. Protect your compressor when power outage and Electrical fluctuations. Using normal parts and cheap.
To Control speed DC motor easily with a few parts in circuit.
You finish PWM signal with Arduino control solenoid valve. You should use solenoid coil driver circuit. Good choice. 2 MOSFET and a few parts
Simple Key code lock switch circuit using IC-4017 digital, uses 10 switch bottom to control output by Relay. No microcontroller so easier and cheaper!