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kcin
Joined: 19 Oct 2009
Posts: 1
Location: Berlin
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 19 Oct 2009 14:32 Tuning fork oscillator, any ideas? |
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Dear all,
I'm a visual artist (never studied electronics but can read a circuit diagram and do build stuff) and I work also lot with sound. I'm making a work that uses 2 tuning forks with mirrors on the tines. As the forks vibrate a laser beam reflects off the mirrors and projects lisajous patterns. I have been having problems driving the forks in a reliable way. I used a simple buzzer type circuit before but the contacts burn out over time, then I came across the idea of doing it with 2 coils: a drive and pick up type arrangement using a driver and an amp so the electronics put the forks into self-oscillation. I'm struggling to find an overall solution and a simple circuit that will do this and would welcome any suggestions. The forks are about 20cm tall.
Thanks in advance for any advice.
Best Nick
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FvM
Joined: 22 Jan 2008
Posts: 5162
Helped: 767
Location: Bochum, Germany
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19 Oct 2009 16:58 Tuning fork oscillator, any ideas? |
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Electromagnetic drive and sense has the advantage of contactless operation (with a ferromagnetic steel tuning fork).
The drive and sense coil both need a DC bias current or a biasing permanent magnet for correct operation.
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sajal1975
Joined: 25 Mar 2005
Posts: 150
Helped: 3
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27 Oct 2009 17:47 Re: Tuning fork oscillator, any ideas? |
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| electronically turning fork can get by uc.
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