From majordomo-owner@berlioz.nsc.com Mon Mar 3 15:54:00 1997 Date: Mon, 3 Mar 97 15:53:59 PST To: jmoss From: majordomo@berlioz.nsc.com Subject: Majordomo file: list 'laser' file 'laser.9605' Reply-To: majordomo@berlioz.nsc.com Content-Length: 19184 -- >From owner-laser Tue May 7 13:06:33 1996 Return-Path: Received: by berlioz.nsc.com (4.1/SMI-4.1) id AA28077; Tue, 7 May 96 13:06:33 PDT Date: Tue, 7 May 96 13:06:29 PDT From: jmoss (Jim Moss) Message-Id: <9605072006.AA28058@berlioz.nsc.com> To: laser Subject: West Coast VHFer Sender: owner-laser@berlioz.nsc.com Precedence: bulk Our mail reflector got a mention in the West Coast VHFer for May. Lots of new people have been signing on all week! Had a conversation this weekend with some guys in the Santa Rosa CA area. Some are very interested in doing some setups for June VHF. So Bay Area folks may have some people to try to work. My rover team is looking at a possible Bay Area jaunt or N. Nevada. If we get enough people who will run 2G,10G, Laser, it will sure pay off to stay in the Bay Area! Jim WB9AJZ/6 CM87xi 5mW on 670nM, 8" parabolic mirror on RX. >From owner-laser Tue May 7 18:59:56 1996 Return-Path: Received: by berlioz.nsc.com (4.1/SMI-4.1) id AA17307; Tue, 7 May 96 18:59:56 PDT Date: Tue, 7 May 1996 18:52:41 -0700 From: sjnoll@ix.netcom.com Message-Id: <199605080152.SAA14408@dfw-ix4.ix.netcom.com> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Subject: Laser Power Meter... To: laser@berlioz.nsc.com X-Mailer: SPRY Mail Version: 04.10.06.22 Sender: owner-laser@berlioz.nsc.com Precedence: bulk Quick note... I'm working on a simple and inexpensive laser power meter. Will have more news in the next week or two... 73, Steve J. Noll | Ventura CA | WA6EJO | IEEE | AVS | sjnoll@ix.netcom.com >From owner-laser Sat May 11 00:05:22 1996 Return-Path: Received: by berlioz.nsc.com (4.1/SMI-4.1) id AA07722; Sat, 11 May 96 00:05:22 PDT Message-Id: <199605110703.AA004238224@host-04.colby.edu> X-Sender: aballen@colby.edu X-Mailer: Windows Eudora Light Version 1.5.2 Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Sat, 11 May 1996 07:03:56 +0000 To: laser@berlioz.nsc.com From: "Art Allen, KY1K" Subject: SLR Elevation indicators... Sender: owner-laser@berlioz.nsc.com Precedence: bulk Hey Guys, This is a cross post I guess. Hope it's appropriate. It appears that .1 degree elevation resolution is possible for $86. For SLR, the .1 degree resolution is a tad marginal, but probably adequate and the assembly appears small and nearly impervious to weather considerations. No flames please.... I'm outta here...Art... >I ran across a Web site offering some interesting >optical encoders which would make excellent >Elevation and Azmuth indicators. The web page >is: http://www.usdigital.com/hseries.htm > > >Here's a sample of their Optical Inclinometer >(Tilt Sensor) which will give 0.1 Degree Resolution >for Elevation and requires no connection to the >rotor. > > >--------------------------------------- > > > > >Description > >The T2 inclinometer is a low cost digital tilt transducer used to >report the angle of an object with respect to gravity. Optical shaft >encoder technology provides unlimited range and virtually eliminates >linearity errors. Internally, an optical encoder disk is suspended >between two micro-ball bearings. A weight placed on one side of the >wheel assembly causes it to follow the source of gravity. Internal >magnetic damping assures fast response time while minimizing >oscillations and ringing. As the housing moves relative to the >codewheel, the moving image of radial lines is converted to realtime >TTL outputs. > >Damping: Damping is a balance between response time and ringing. >Standard damping will fit most applications. Typical settling time for >standard damping appears to be less than 200 ms. Double damping slows >the settling time by several hundred milli-seconds, not by ringing, >but by more slowly approaching the final position. Some applications >may not require any damping, such as motion detectors. Others may >require double damping to average out cyclic motion such as found in >moving vehicles. Damping options can be specified when ordering. > >Index: The optional index can serve as an absolute reference to reset >an external counter. For standard orientation, the index will go high >when the connector pins point toward gravity. Other orientations can >be specified. An optional adapter plate will be available which will >allow the inclinometer mounting angle to be adjusted before the screws >are tightened. > >Notice: In applications where a failure could result in an >unacceptable loss, we recommend that your system be designed to >include two redundant inclinometers with the outputs from both >continuously compared to make sure that they agree. If there is a >discrepancy, the system should be designed to automatically shut down >as a fail-safe measure to minimize the risk of damage or danger. This >product is not certified for applications where a failure could result >in a costly, dangerous or life threatening situation. > > >Features > > Low cost > > Fast response > > Rugged and simple > > 2-channel quadrature outputs > > 3rd channel index option > > TTL compatible > > -40 to +100 C operating temperature > > Single +5v supply > > 360 degree range > > 1440 codes/rev. = 0.25 resolution > > 3600 codes/rev. = 0.1 resolution > > 7200 codes/rev. = 0.05 resolution > > 2 year warranty > > >Mechanical Specifications > >Weight: < 1.8 oz (50 grams) >Material: 20% glass filled polycarbonate >Natural Pendulum Time Period: 136 ms >Natural Pendulum Resonant Frequency: 7.4 Hz > >Accuracy > >Parameter Typ. Max. Units >Position error for 1440 codes/rev. .30 1 degrees >Position error for 3600 codes/rev. .15 1 degrees >Position error for 7200 codes/rev. .1 1 degrees > > >Electrical Specifications > >A leads B in a clockwise shaft rotation, and B leads A in clockwise >shaft rotation viewed from the mounting surface side of the T2. For >complete details see our HEDS Optical Encoder Module specification >page. > > >Mounting Instructions > >To mount, slip the two factory supplied 4-40 x .625" screws through >the mounting holes and screw them into threaded inserts or pre-tapped >holes in your mounting surface. When mounting holes are not available, >a pre-applied transfer adhesive (with peel-off backing) is available >for "stick-on" mounting. Option-T specifies transfer adhesive on the >mounting surface. Do not deflect the case inward since this may >squeeze the internal shaft against the bearings. This would reduce the >accuracy until the case is released to return to it's original shape. > > >Accessories > >Cables and Connectors >CUB-5 - Digital counter with LCD display. > > >Ordering Information > >T2 - (Resolution) - (Options) > >Resolution >1440 codes/rev. (.25 )* >3600 codes/rev. (.1 ) >7200 codes/rev. (.05 )* >Other resolutions available upon request. >* The Index option is not available for this version. > >Options >I = Index (3rd-channel) >N = No damping >D = Double damping >T = Transfer adhesive on mounting surface > >T2 >Price: >$53.00 / 1,000's >$58.00 / 500's >$60.00 / 100's >$63.00 / 50's >$67.00 / 10's >$75.00 / 1's > >Cost Modifiers >Add $9.00 for 7200 codes/rev. or index. >Add $10.00 for double damping (D-option). >Add $5.00 for transfer adhesive (T-option). > >de Mike, AF9Y >http://www.webcom.com/af9y >Work: mwcook@itt.com >Home: mwcook@cris.com > > >From owner-laser Mon May 13 06:32:24 1996 Return-Path: Received: by berlioz.nsc.com (4.1/SMI-4.1) id AA22247; Mon, 13 May 96 06:32:24 PDT From: sjnoll@ix.netcom.com Date: Sat, 11 May 1996 12:11:56 -0700 Message-Id: <199605111911.MAA26247@dfw-ix5.ix.netcom.com> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Subject: Hello new members... To: laser@berlioz.nsc.com X-Mailer: SPRY Mail Version: 04.10.06.22 Sender: owner-laser@berlioz.nsc.com Precedence: bulk Majordomo says there's several new readers to this email list. I think we have two dozen or so now. How about some of you new guys piping in with your interests, questions, etc.? Steve J. Noll | Ventura CA | WA6EJO | IEEE | AVS | sjnoll@ix.netcom.com >From owner-laser Wed May 15 09:25:34 1996 Return-Path: Received: by berlioz.nsc.com (4.1/SMI-4.1) id AA25147; Wed, 15 May 96 09:25:34 PDT Date: Wed, 15 May 96 09:25:32 PDT From: jmoss (Jim Moss) Message-Id: <9605151625.AA25140@berlioz.nsc.com> To: laser Subject: DPMI & PCI help request and IEEE talk tonight Sender: owner-laser@berlioz.nsc.com Precedence: bulk Message I got from another group. Tracking talk. I can't make it to this session. Sounds like it may be applicable. Jim WB9AJZ/6 ----- Begin Included Message ----- >From Andrew.Korsak@ReadRite.com Tue May 14 17:22:31 1996 From: Andrew Korsak To: "achetham@mtvmail-12.Corp.Sun.COM" , Jeff Furman KD6MNP , Jim Moss WB9AJZ , John Crane KD6JUH , Mike Cheponis K3MC , Don Ferguson KD6IRE Subject: DPMI & PCI help request and IEEE talk tonight Date: Tue, 14 May 1996 09:49:00 -0700 Return-Receipt-To: X-Mailer: Microsoft Exchange Server Internet Mail Connector Version 4.0.838.14 Encoding: 16 TEXT Content-Length: 773 Al, Don, Jeff, Jim, John, Mike, Are you, or anyone else you can suggest, familiar with the Dos Protected Mode Interface and Peripheral Component Interconnect environments on PC's? I need some examples of access code. What I've got so far is the book "PCI System Architecture" 3rd ed. by MindShare Inc. and some C & assembler code examples that I can't get to work. My DOS Programmer's Reference is not clear on what to do with all those Int 2fh and Int 31h calls -- what's the order of events, etc.? By the way, tonight is an IEEE Signal Processing Society talk on "An Image Enhancement Approach to Target Tracking" by Dr. Scott Shaw of SRI, at 7PM Santa Clara Univ. EE Bldg Rm 236. I'm planning to be there -- pass this on to anyone that might be intereseted. Andy ----- End Included Message ----- >From owner-laser Wed May 22 17:22:55 1996 Return-Path: Received: by berlioz.nsc.com (4.1/SMI-4.1) id AA08843; Wed, 22 May 96 17:22:55 PDT Date: Wed, 22 May 96 17:22:53 PDT From: jmoss (Jim Moss) Message-Id: <9605230022.AA08837@berlioz.nsc.com> To: laser Subject: Cheepo RX almost ready. Sender: owner-laser@berlioz.nsc.com Precedence: bulk zzzzzzzzzzzzzzzzzzzzzzzzzzzzaaaaaaaaaaaaaaaaaaaaaaaapppppppppppppppppp! Ready for laser contacts for June? Hope to have info on a cheepo (<$10) RX solution published here tomorrow, hopefully in time for everyone to build one up before June VHF! No claims of "the best", or great distance, but 1kM doable. Can do a xcvr for about $45. Most expensive piece!? Laser pointer available here in CA at Fry's (1mW) for $29! All other components will be RadioShack purchasable. (cheapest RS pointer is $49.) Jim WB9AJZ/6 CM87xi Sunnyvale, CA 670nM, 5mw, 8" mirror rx. Current longest Q=0.82Mi (no lenses or mirrors). using OOK, 800Hz. >From owner-laser Thu May 23 11:42:25 1996 Return-Path: Received: by berlioz.nsc.com (4.1/SMI-4.1) id AA16515; Thu, 23 May 96 11:42:25 PDT Date: Thu, 23 May 96 11:42:22 PDT From: jmoss (Jim Moss) Message-Id: <9605231842.AA16509@berlioz.nsc.com> To: laser Subject: Cheepo Laser "CW" Transceiver Sender: owner-laser@berlioz.nsc.com Precedence: bulk Cheepo Laser "CW" Transceiver by WB9AJZ/6 Jim Moss jmoss@berlioz.nsc.com Parts can all be found at Radio Shack. Feel free to substitue better parts or redesign at will. There is no ownership, or responsibility for this design associated with me. Use at your own risk! But have fun! Use care when operating lasers, as they can cause eye damage. More on this another time. Just don't look into the beam for now. Receiver -------- Parts: TL082 opamp, rs# 276-1715 LM386 audio amp photo transistor rs#276-145a 10Mohm Resistor 150Kohm Resistor 3 .01uF capacitors 10k pot 2 10uF caps 50 uF cap 2 battery clips 2 9v batteries 2 9v battery connectors 1 earplug speaker 1 1/8" sub min jack double perf board with copper, break in half Forgive the "TEXTUAL" drawing: I'm sure you can improve on this mediocre design. +9v | \ 1/2 TL082 1/2 TL082 LM386 / 10M \ .01uF 3|\ 1 .01uF 5|\ 7 .01uF 10K pot /-----||------|+\--+----||------|+\---+-||-----\ |\ 50uF |/ ---|-/ | ---|-/ | / 3| \ 5 + ~~| | 2|/ | | 6|/ | \<----|+ \-----||--center |\ |_______| | 150k | / |--|- /1 10uF of v \/\/\/\/ \ | 2| /----||--| jack | Note: TL082 power is pin8 to +9v | | |/8 + | -9v pin4 to -9v -9v -9v \_________| Note: LM386 pin 6 to 0v pin 4 to -9v 10uF cap from 6 (+) to 4 OK thats the Receiver. Should take about an hour to build. To test it, just turn on a light and listen to the buzz. You can adjust sensitivity by changing out the 10M resistor with a smaller one. ie. 1M or 100k or 10k. The pot can adjust volume (somewhat). The 386 is strong enough to drive a small speaker (like computer type). Transmitter ----------- Parts laser pointer (any will do, but look for one you can route a wire pigtail out of without destroying it! Then you can still use it for work! I am trying to standardize here on 670nM, but you can choose. this only becomes important when you start using bandpass filters. I run a 4mW one.. you can use 1-5mW. Fry's here in CA has sales with their cheepest at 29.99+tax. beam looks OK, but a bit broad. LM555 astable osc NPN xsistor (your choice of #) 4.7k resistor 10k resistor 15k resistor 10k pot 8.2k resistor (you can change this) .068uF cap 2 1/8" jacks 2 1/8" plugs (1 for keyer, 1 for laser) 1 9v battery connector 1 9v battery 2 9v battery clips (1 for laser, 1 for battery) 1/2 (the leftover half) PC perf board (about 2"x2") Goal is to build a on/off controllable 800Hz oscillator to key the laser. You can adjust .068 cap and resistors as you like. 10k pot 4.7k \/\/\/--\/\/\/-- .068uF T | ----------------+----||--- | | 15k | | | \-----+9v +/\/\/+ n/c to pin GND | | | | 2 --------------------------- | 8 7 6 5 | | LM555 | | | | 1 2 3 4 | --------------------------- | | | | GND to pin | +-----------------On/Off Key to +9v 6b | \ | / 8.2k /------Keys laser | \ | | | | (optional) | GND +-\/\/\/\-- +9v | / 10k | 1.5k |/ \--/\/\/\/\---| NPN of choice |\ V GND Inside the laser you will find the switch that turns it on and off. Identify the ground and voltage sides with a VOM. Connect ground of laser to ground of cct. Connect hot side of switch to "keys laser". Use your keyer or hand key or switch to key the "ON/OFF KEY". One side goes ot this pin the other to +9v. If you need to, you can add a transistor cct to buffer to your keyer. Mine works fine. Mount the 2 9v battery holders one on top, one on bottom of the cct board. you can put the battery in one and the laser in the other. To test: point laser to ceiling. Move it back and forth quickly while holding the key down. You will see dashed lines instead of a solid line. You can even "see" the duty cycle! This was discovered by my daughter! - - - - - TOGETHER? You can put the 2 pieces in a case, but... beware the rx picks up the 555 oscillation. Best to encase the RX in an alum case OR since we are cheap, aluminum foil (with a wire to the cct board ground). Be sure to leave a hole for the phototransistor. AIMING? Handheld is almost useless. A camera tripod is good. For practice go to your local car parts store and look for DOT-90 reflectors. They have sticky backs and you can get a great return on them (about $4). Or head to the junk yard for reflectors off cars (thunderbirds have GIANT ones in the rear lenses (a few years ago). Bore sites seem very good. I mounted a 1/8" ID tube to my laser. I site thru it. Works good in daylite, but problems at nite, unless there is a light source at your target. Lots more to be written on this subject... LATER! CLOSING DO IT! I need contacts in JUNE from UC Santa Cruz, CM87xx! Jim WB9AJZ/6 Sunnyvale, CA CM87xi jmoss@berlioz.nsc.com >From owner-laser Fri May 31 15:26:46 1996 Return-Path: Received: by berlioz.nsc.com (4.1/SMI-4.1) id AA25972; Fri, 31 May 96 15:26:46 PDT Date: Fri, 31 May 96 15:26:43 PDT From: jmoss (Jim Moss) Message-Id: <9605312226.AA25966@berlioz.nsc.com> To: laser Subject: Burr-Brown monolithics Sender: owner-laser@berlioz.nsc.com Precedence: bulk Visited the BB website (www.burr-brown.com) and reviewed data sheets for their OPTxxx products. 101 is interesting as you can get it with a red filter built in. Cuts off at 580nM. But noise is higher than other products. 210 is available with 300KHZ BW and lowest noise. I am using 1KHZ as a comparison, assuming use of 800Hz note on CW. responsivity: 0.45A/W at 650nM NEP (Noise Effective Power) at 1KHz is 8x10-12 Watts This is in the same range as STEVE's range calculations that he sent on 4/15. Ordered a couple to play with... $9.35 plus tax (full price) from a local distributer. Jim WB9AJZ/6 CM87xi Sunnyvale CA. How are those "cheepo" rx's doing? I did some more experiments and if you dump the LM386 for a quieter Amp you can get almost 10dB S/N improvement. If there is interest I'll publish it. Anyone gonna be ready for VHF contest, or FD or VHF WPX or UHF or uWave contest? I'm ready to play any time. Have 2 TX and 3 RX now. Need someone to play with. Jim