Sameer Gupta writes:
It is an small & inexpensive project to reduce overflowing of water.In this project,a motor for water pumping is connected with this system.When water reaches to its top level,motor will automatically switched-off.
Tank Motor Pump Controller - [Link]
I wanted to build an etching tank since i first saw one in an article on Make Blog. It was fun to make it and it will sure speed-up my PCB making process. The main thing that i wanted to achieve with my etching tank was to keep it thin so it holds up smaller amounts of etchant, it’s better this way because i need to store and work with smaller quantities. My finished tank holds 1,5 L of liquid when full.
PCB etcher with aquarium pump and heater - [Link]
This Spa controller, developed by Richard Wotiz, is a winner of 2007 Microchip 16-bit embedded control design contest in CircuitCellar. Controller is able to drive 2HP single phase AC motor. Circuit operates with capacitor-start/capacitor-run motors. It also includes active power factor correction and inrush current limiting.
Motor driver is controlled by 16-bit dsPIC30F2020 microcontroller which drives motor via three phase IGBT power module. Spa controller can be connected to separate interface unit which is based on PIC16F687 where pump can be controlled by using while messages are displayed on LCD. Full project entry is here. [via]
dsPIC30F2020 based Spa pump controller - [Link]