I bought a solar wall lamp with sound detection, but I have to make a lot of noise to turn it on.
Could anyone help me out with finding out how to increase the sensitivity? My skills in electronics are close to zero...
Looks like a LM358 (U3) op amp is used to amplify the electret mic in this circuit. Check out the **broken link removed** for the AC coupled amplifier circuits and possibly a low pass filter. Draw up the resistors in relation to the pinout diagram of the LM358 for the circuit board ,and match up to the reference circuits. A high value trimpot could be added in place of the gain resistor, to vary the sensitivity. For instance the inverting amp the gain is Av = Rf/R1, with Rf being the high value resistor or trimpot. The surface mount resistors markings.