Couldn't graduate hardware has been slow to do the fast cry never contact hardware request bosses give directions
I trying to accomplish is soil moisture sensor probe signal acquisition part: a pair of rings metal electrode constitute measuring capacitance, measurement of capacitance, inductance and form a resonant voltage controlled oscillator produces high frequency signal, and then by plastic formation of low frequency signal output circuit and frequency division circuit
That is to say: moisture changes when the measured capacitance will change, further change the frequency of the circuit, so that I can be calculated by measuring the circuit frequency water score
I only know about principle but don't know where to put these in circuit implementation to step start
I would like to ask you teacher:
More than 1, I wonder if I can separate description of this part of the circuit design and then measure the data, can need not to SCM?
2, I chose the vco MC1648, is there anyone can do MC1648 simulation software, I can't find how all SOB
3, finally by plastic, low frequency divider circuit output signal where can I read it, I can connect the oscilloscope to read out? (I'm sorry I really don't understand,,) if you can use the oscilloscope oscilloscope even where
4, the measurement of capacitance capacity value, how can I read it out, because the capacitance value change is pF theory is very small, I also add a weak capacitance detection circuit?

Bosses give directions to hardware I really do not understand, and baidu out explanation is so professional thank you!!!!!! Thank you very much!!!!!!!!!!!!!!!