Re: Encoder tuning knob for amateur radio RX/TX

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#2552

From: Russell Shaw
Date: Thu, 06 May 1999 00:00

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Hi,

Sounds promising, what brand/maker are the encoders?

Mark Rehorst wrote:
> 
> Digi-key has some $5 mechanical encoders that spit out 32 cycles per
> revolution.  I haven't seen more than 32 for 1 turn.  Do you need/want
> detents?  If so, you'll definitely be limited in steps per rev.
> 
> There are two common ways to read encoders- an up/down counter circuit with
> parallel output and a microcontroller.  If you use a microcontroller, you
> can vary the size of the steps (frequency?) depending on how fast the knob
> is being turned.  If you're programming the frequency in a PLL, you'll need
> an MCU to send the frequency setting via 3 wire bus to the PLL anyway, so
> you can just program the MCU to read the encoder also.
> 
> Peatman's book on PIC MCU programming has some very clear examples of using
> encoders.
> 
> MR

--

Regards,
    Russell, VK3KRS.

MARTIN COMMUNICATIONS Pty. Ltd
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Ph. +61 3 9560 9999   Fx. +61 3 9560 9055
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    __ __   __ __   __ __
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From: Russell Shaw <russell@martin.com.au>
Subject: Re: Encoder tuning knob for amateur radio RX/TX
Date: 1999/05/06
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