After great distress and struggle. I finally got an example setup of a microcontroler system that can track the resonance frequency.

https://www.youtube.com/watch?v=VjVFKYE6Y-g

New video showing a 20 MHz crystal, sweeping up to 1 MHz. I chose an upper limit of 1 MHz because I wanted to have some degree of resolution. The first step the chips can make away from 1 MHz is 5% change in frequency, and for every lower frequency one step gets more precise. One tick slower than 500 KHz is a 2.5% change in frequency. You can change the frequency at 1% once you hit 200 KHz.

I plan on have the frequency phase controllable, when you can hook up multiple chips and have multiple in phase signals.

My next project after this one will be to make an ignition timing controller. I know they sell them but the price tag is just not acceptable for the average garage inventor.

So are you planning to use this to drive a VIC? How does it detect resonance, similar to a PLL?

//Viktor

Quote from Andrinoid on August 15th, 2012, 06:09 AM

New video showing a 20 MHz crystal, sweeping up to 1 MHz. I chose an upper limit of 1 MHz because I wanted to have some degree of resolution. The first step the chips can make away from 1 MHz is 5% change in frequency, and for every lower frequency one step gets more precise. One tick slower than 500 KHz is a 2.5% change in frequency. You can change the frequency at 1% once you hit 200 KHz.

I plan on have the frequency phase controllable, when you can hook up multiple chips and have multiple in phase signals.

My next project after this one will be to make an ignition timing controller. I know they sell them but the price tag is just not acceptable for the average garage inventor.

Hello Andrinoid,

How would you find out what the resonance frequency of a gas is?

Like Helium

Greetingss..

EZ

As video above shows one Arduino can´t do jitter free output and calculations. reason is that one core is running and interrupt controlled time sharing.

propeller microcontroller has 8 internal cores with little external components. so it is first choice for pulse generation and complex calculation as resonance searching mode shows:

https://www.youtube.com/watch?v=BdgJMh9hTQw

Automatic sweep is also implemented.


more information: http://open-source-energy.org/?topic=2048.0