Cell phone detector or EMF detector circuit
It is a very simple cellphone detector circuit designed using IC LM 324 op-amp it can also detect EMF ( Electromagnetic Frequency ) Parts list - IC lm 324 ( 14pin) 1k - 3 pcs resistor 470k resistor 10k preset Diode IN4148 - 2 pcs BC548b transistor 470pf ceramic capacitor Veroboard or Breadboard wire 9v battery Transistor & IC pins Circuit diagram of emf detector The circuit on vero board Project making video