Arduino Water level Indicator
Here's a nifty project I came up with to help the people at home. It's a system that checks the waterlevel of an overhead tank and sends the data using radio frequency wireless modules. There are some LEDs on the receiving unit which indicate the waterlevel and a piezo speaker which alerts when the tank is empty or is about to overflow.
First attempt using RF encoder chips. Antenna for the RF module has been 'wound' around the transmitter because I found that it (wierdly) increased the range.
Receiver end with RF decoder chip. White LED shows that a valid transmission has taken place.
Improvised version with hardware encoders replaced with software encoding using atmega8 (programmed in Arduino)
After major struggles with antenna selection, went with a coil of wire taken from a mini transformer.
Couldn't resist fixing the transmitter case with some scrap aluminum sheet. Dont know if it's doing a great job but hopefully will reflect out the heat.
Being tested at at range of 12m and reading the data loud and clear :P
Final version with lots of changes in code to prolong battery life. Tested at a range of 20 meters at 5V.