Hi all, I'm new to the forum so I hope I'm posting this in the right place. I'm currently working on a senior design project which requires my team to create a working prototype of a coaster that changes color based on how full the drink on top of it is. We plan to control the prototype with some simple Arduino logic which lights up different LEDs at different weights (e.g., full, 2/3-full, 1/3-full). The problem is finding an effective weight sensor. My team has purchased a force-sensitive resistor (FSR) but found that it's not quite precise enough to give us the results we're looking for. The sensor we use should work within a range of about 1-4 lbs. Does anybody have any suggestions on a sensor that might work for us? We're looking to keep the budget under $100. Thanks in advance for the help!