How to look for your misplaced Cell Phone

Misplacing your cell phone can sometimes be annoying. This is a common problem among people who are busy and people who suffers short term memory loss.

I’m a quite a busy person and sometimes forget where I have place my cell phone whether at the house or at the office. So I look for solutions to the problem. The solution, a cell phone detector! How cool is that!

I found out this interesting cell phone detector project here. What’s cool about the project is that a circuit was design to detect signals being used in the GMS.

First was to create the PCB found on the pdf provided. The detector uses LM358 that amplifies the received signal from the cell phone.  It contains two separate op-amps that are supplied by a common power source. R3 and R7 resistors determine the gain of the amplifiers. When the resistor values are greater than 10M then the noise level increases. If they are small like about 100k, this time it becomes harder to hear the signal.

So there you go, a nice cell phone detector if your too annoyed looking for your misplaced cell phone.