![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhaI9nbIhjyMdcbhiCBDXZW5mdbPrn12L37paZnGj6u9TyUW9LeUsoDOWW9gpaGPpHWDvVMDNGkcXXmPQIS5pCJGXQlILudW_Xyl3k9CHt3Jzn2OP5DGqS5-QpItDu5nwwgqsmywoXtcQ/s200/level_indicator_2.jpg)
Features:
- Power Supply 6 - 15 volts
- Measuring four different levels
- To give voice warning about filling or emptying the reservoir, "exactly according to the delicate"
- Very small and components are cheap and available
Parts Lits:
- IC CMOS CD4066
- Transistor BC148
- Resistance 330 Ohm 4x
- Resistance to 180 KOhm 4x
- Four pairs optical multi-color LED
- Small buzzer/bell 6-15 volt
Water Level Indicator in Detail