Re: 1-32 Khz in 1khz divisions



Jim Thompson wrote: 
On Tue, 27 Dec 2005 08:03:41 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@xxxxxxxxxxxxxxx> wrote:


On Tue, 27 Dec 2005 04:32:02 GMT, Fred Bloggs <nospam@xxxxxxxxxx>
wrote:



Jim Thompson wrote:


Duty Cycle Version....

http://www.analog-innovations.com/SED/DutyCycleX32Channel.pdf

...Jim Thompson

Quick! What line are you reading when the voltage is 2.273V? 

The initial two clocks during reset DOES cause some heartburn.

Don't know whether it'd be worth the logic to fix the reset, or just
devise a nice receiver that lights an LED.

...Jim Thompson 


Just AND the clock with each of the output lines and you get 1-thru-32
pulses per cycle.

Then the receiving end can simply be a (probably BCD) counter and an
LED or LCD display driver.

...Jim Thompson

That was the main drawback of my original cut at this. That makes 32 ANDs or 8-quad ICs- so something had to be done about that. After fiddling with a few ideas it dawned on my that since this will a battery operated field instrument, you can chop all the output lines with a single gate driving the reference shield:
View in a fixed-width font such as Courier.

..
..      XMTR
..      PWR LMTD
..      ISOLATED             32-bit SR
..                                                   LINE #
..                          ----------
..                .--------|RST     Q0|-------[1k]---> 32
..                |        |          |
..                |        |          |
..                |    '1'-|D       Q1|-------[1k]---> 31
..                |        |          |
..       _   _    |        |          |
..     _| |_| |_-------+--->CLK       |        .
..                |    |   |          |        .
..       1KHz     |    |   |          |        .
..                |    |   |          |
..                |    |   |          |
..                |    |   |          |
..                |    |   |       Q31|---+---[1k]---> 1
..                |    |    ----------    |
..                |    |                  |
..                |    |                  |   |\
..                |    '---------------+--|---| o----> SHIELD
..    -------------------       __     |  |   |/
..   |            Q      |     /  |----'  |
..   |                 B |----<   |       |
..   |    CD4538         |     \__|-------'
..   |                   |
..    -------------------
..         3ms ONE-SHOT
..
..
..                                        --------------
..                                       |  __      __  |
..                                       | |  |    |  | |
..                                       |  --      --  |
..                                       | |  |    |  | |
..                   RCVR                |  --      --  |
..                                         -------------
..                                              |
..                                              / 14
..                       CD4093                 |
..LINE                   __     __     --------------------
.. >-|>|-+--[33K]--+----|  \   |  \   |                    |
..       |         |    |   o--|   o-->CU    CD40110       |
..    [3.3K]       |  .-|__/   |__/   |                    |
..       |         |  |               |                    |
..       |         |  |               | LATCH          RST |
..      ---        |  |                --------------------
..      com        |  |              _ _  |             |
..                 |  |               |   |           [100K]  _|_
..                 |  |                   |             |
..                 |  |                   '--------.    +---.
..                 |  |                            |    |   |
..SHIELD           |  +------[100K]-------+----+-----||-' [10K]
.. >----.          |  |                   |    |   | 100p   |
..      |          | ===                  |    |   |       ---
..      |          |  | 470p              |    |   |       com
..     ---         | ---                  |    |   |
..     com         | com                  |    |   |
..                 |            __      -------------------
..                 |           |  \    |  Qa   Bb  /Qb     |
..                 +-----------|   o---|Ba                 |
..                 |           |__/    |    CD4538         |
..                ===                  |                   |
..                470p                  -------------------
..                 |                    1,5ms retriggerable
..                ---
..                com
..
..
..

.

Relevant Pages

  • Re: 1-32 Khz in 1khz divisions
    ... devise a nice receiver that lights an LED. ... pulses per cycle. ...
    (sci.electronics.design)
  • Microsoft wireless desktop receiver 3.1a
    ... I just bought the Microsoft Wireless Optical Desktop 2000. ... the receiver into my USB port it comes up "New Hardware Found", ... The caps/num lock lights don't go on ...
    (microsoft.public.windowsxp.device_driver.dev)
  • JVC RX-DV3R - no output from digital sources
    ... After some more investigation it seems that the receiver stays mute on ... analog source. ... The lights showing the speaker configuration will only ... light up on analog/external sources and it will play that source. ...
    (sci.electronics.repair)
  • Re: Is the the Honda 1000i REALLy quiet?
    ... cords from the generator into the house and ran a full sized refrigerator, ... large TV and sat receiver and a couple of lights. ...
    (rec.outdoors.rv-travel)
  • Re: Zombiism and wizardry (gravitational time dilation)
    ... If a light source at the top of a ... > tower emits flashes at time intervals Ts and so acts as a clock, ... > receiver on the ground will receive the flashes at time inervals Tr < ... > the number of pulses emitted by the tower clock. ...
    (sci.physics.relativity)