#### shaz

##### Member level 4

**cd4050 ã‚¹ãƒ¬ãƒƒã‚·ãƒ§ãƒ«ãƒ‰**

hi,

recently I found this frequency measurement circuit in a magzine. It measures

frequencies upto 250kHz. Actually the author hasn't given the technical details of the circuit. my doubts are:-

1. what type of frequency can this circuit measure, i.e. can it measure sine wave?

2. as i feel after reading (from few details which are given in), the magzine the

resolution is 1 Hz, how can i incerease the resolution to 0.1 Hz or 0.01 Hz?

3. what's the role of T1, D5, and N1?

i think i've asked many questions,