unable to route 95%-98% but not 100%

@saurabhmalviya68, Please do not hijack threads. Your post is on a completely different subject so please start a new thread for it. If you start a new thread with more information in it about your particular project and the issue that you face then you are more likely to get a helpful reply.

@mh5bl, It is customary to post more information about - and a link to - a public project rather than leaving it up to others who may not have the time or the interest to search for it on your projects page. But you have managed to set your project to be public: https://easyeda.com/mh5bl/Water_Level_Detector_with_LED_Bar_copy-a50e39c1993c4a2c97a115f0116c24c1 so here are some comments on it: 1) Your schematic is cluttered and hard to read. 2) The BC547 symbols you have chosen are almost unreadable. 3) You have the collector and emitter connections of the BC547 reversed. 4) There are no current limiting resistors in series with any of the LEDs. See: https://easyeda.com/andyfierman/LEDs_must_have_series_resistors-OoGYgCK2k 5) You have no information in your schematic that provides any manufacturer or supplier information against which to buy the components. 6) You have not correctly assigned packages to all the symbols in the schematic so that when you try to convert it to a PCB you get package errors: ![enter image description here][1] In your case this is because you have parts in the schematic which are not actually on the PCB so you have to assign connectors to the schematic symbols because that is how you are going to connect them to the PCB. 7) You have manually placed (mounting) holes in the PCB which have no corresponding symbols in the schematic. When you try to update the PCB from the schematic, these manually placed holes will be deleted. 8) There is a lot of text which you have placed as copper on the top layer. It is safer to use the Silk Screen layer for all text. 9) Why have you restricted routing to the bottom layer only? If you order the PCBs from EasyEDA, it costs no more to have a professionally made 2 layer PCB than a single sided board. 10) You need to provide a clearer description of the float system. a) Are you using 8 floats in total? b) What is the on/off resistance specification of the switch in the float? c) How long do you want/expect the circuit to operate for between battery changes (*that* is determines what current your circuit must be designed to draw). Vague statements like `how can I make it less power hungry...(not that I know how power hungry this system is)` help no-one. Conversely, if you cannot design it to draw the current arrived at based on the battery life, work out what current it will draw and then see if you can live with the battery life that will give you. If this circuit is continuously monitoring liquid level *and that monitoring function is important to you*, consider running it from a rechargeable battery source with a mains or maybe solar PV charger * It will help you to start off by reading: https://easyeda.com/andyfierman/Welcome_to_EasyEDA-31e1288f882e49e582699b8eb7fe9b1f [1]: /editor/20171231/5a4820adbd679.png

@mh5bl Also, it is helpful to add **netlabels**. They make the schematic easier to read and help when cross-probing between schematic and PCB.

The pin mapping between the schematic symbol and the PCB package that you have used for the BC547 is wrong. * I strongly suggest that you stop your design work, start a simple project to use to learn how to drive EasyEDA read and work through the documentation linked to in: https://easyeda.com/andyfierman/Welcome_to_EasyEDA-31e1288f882e49e582699b8eb7fe9b1f Pursuing the current project as it is without doing that will take you a very long time and will probably result in you wasting your time and money on a PCB that does not work. All of which, for a beginner, is a very frustrating and discouraging experience that can be easily avoided. :)