package dimensions
pdf here<--

helical coil calculator online
explore it here<----

The following programs calculate the relevant currents and voltages for various switch mode power supplies and display these graphically. Furthermore the programs give suggestions for appropriate choking coils and high frequency transformers.
                                                                                       explore here<---

dual opamp. Necessary for the clap switch v2.

Explore here the datasheet<---

I've changed the values of the resistors R11 , R12 , R6.
This is for the amplification level of the signal.
I think that the previous values offered bigger amplification than we wanted.
So now we have more flexibility with the audio levels of the signal.
New values: R6 =10K , R11=4,7K , R12=10K