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Details about  High resolution optical rotary encoder for DDS module VFO etc.

High resolution optical rotary encoder for DDS module VFO etc. See original listing
Item Ended
Item condition:
26 Jun, 2014 23:13:39 BST
£3.10 Economy Delivery | See details
Item location:
Abergele,, Conwy, United Kingdom


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Seller assumes all responsibility for this listing.
Last updated on  25 Jun, 2014 11:40:08 BST  View all revisions
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Item specifics

New: A brand-new, unused, unopened and undamaged item in original retail packaging (where packaging is ... Read moreabout the condition

TechnoFix UK

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High resolution optical rotary encoder for DDS VFO etc.

This superb optical rotary encoder is the ultimate solution for your DDS VFO project. Ultra-fine resolution gives totally smooth tuning with no jumping. Absolutely no backlash or play. No de-bounce required. Rated for up to 6000 rpm!
  • sealed ball bearings
  • fully enclosed - protected against dust
  • 400 pulses per revolution (1600 edges)
  • shaft accepts standard 6mm knobs
  • 5-24V DC supply
  • 2 open-collector quadature outputs
  • shaft dimensions 6mm Dia, 13mm Length
  • outer dimensions 38mm Dia, 35.5mm Length
  • industrial quality
  • 1m screened cable

Demonstration only. Only the encoder is for sale.
Design notes:

The quadrature outputs are open-collector, so can be interfaced to 3V3 or 5V logic. Pull-up resistors will be required. With some microprocessors, these can be on-chip, enabled in software.

Because of the high resolution of the decoder, your software will need to be able to cope with high pulse frequencies and small tuning steps. Our demo in the video uses edge detection (1600/rev)
using interrupts and 1Hz tuning steps on an Arduino Mini Pro clone. This gives 1.6kHz per revolution. Simply substituting for a cheap contact-based decoder without changing the software may not give good results. Sample code here:

Panel mounting requires a 20mm hole and three M3 screws (included).

Red DC supply +5 to +24V
Black DC & signal ground
White & Green A/B Quadrature outputs
Shield/screen Connect to ground

Money back guarantee. If you are unhappy with your purchase in any way, simply return it within 30 days for a refund.

Postage at cost, you pay what I pay. Proof of posting obtained for all shipments. No packing charges. Orders received before 3 p.m. are normally posted on the same day (Mon-Fri).

Copyright © 2014 TechnoFix UK. The text, pictures and video in this listing are our own original work. Copying is against eBay rules and will not be tolerated.

Business seller information

VAT number: GB 186640188
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Return postage will be reimbursed if we have sent the wrong item or if the item is being returned as faulty and tests on receipt confirm this.
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