Simple water feature control unit

Title: Simple water feature control unit Goal: Design and build replicable solution to detect water at a high level mark starting a pump to move water from lower chamber to high level chamber and stop when the low water mark is reached. • Water flows freely from upper chamber to lower chamber • In lower chamber sensor detects if water is at the high level mark – when detected a pump is switched on • When the lower level mark is detected pump is switched off Details • Height of lower chamber is 150mm high, width 150mm, length 250mm • High water mark is set at about 120mm • Low water mark is set to about 5-10mm Notes • The high and low water mark need to be moveable and are not going to be exact • This is a very low cost design, the most cost effective parts are required • Sensors will be operating in water, probably with a high rust content • Control unit can be outside lower chamber (i.e. not immersed in water) however preferred to be inside lower unit (smaller is better) • Basic parts to be sourced/purchased and agreed upon before purchase o Water pump – 240v (max US$8-12) o Reed switched (max US$4 each) o Various electronics (to be discussed) Deliverables • Completed product delivered with all components connected and operational • Parts list and contact details i.e. where to source in future • Design document detailing construction and operation including electronics ** please note that this is a concept project and the chance of further work is possible