Turn-key PCB assembly services in prototype quantities or low-volume to mid-volume production runs

Arduino controlled toiled saves gallons of water per day

Lots of water is wasted in toilets around the world. Standard toilets flush about 6500ml of water mo matter if you are doing light or serious business. Some toilet flushers have dual button where one allows partial flushing, but it is not used in most cases -especially by kids. So TV Miller decided to automate water saving process here. He adopted Arduino system which fills only half of tank with water. This is more than enough to flush human urine. This is most often used option. If someone wants to do serious business, there is a button that once pressed fills tank full while you’re here. Toilet has several improvements including electronic flush release mechanism based on servo. If this is not enough there is a bluetooth channel which allows flushing toilet with your smart phone. But probably most welcome feature of it is that it helps saving water – about 2 gallons per day. What if 1825 people would install this setup – they would save 1000000 gallons per year. Continue reading

Toilet buddy makes sure you left bathroom as you found it

There is some routine in a bathroom you have to do. These include closing toiled lid, switching lights off. These things especially we menfolk forget time to time. So Nicholas McClanahan built a battery powered Propeller device which makes sure you won’t forget these things. Toiled buddy does three main things: plays back flushing sounds when toilet seat is up; plays reminder sound to put toilet seat down when light is off and reminds to turn off light when toilet seat is down. All this is achieved with simple circuits. Light is detected with simple photo-resistor. Instead of measuring its voltage with ADC he has chosen to measure RC discharge time. Toilet seat is detected with IR detector circuit where IR diode and IR receiver is used. Infrared signal is modulated at 38kHz to avoid environmental noise. And finally Audio is generated out of stored wav files and played through digital pins. This device can be modified to work for different purposes like open door detector, doorbell, musical instrument and even more. Continue reading