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Note 44.356 MOUNT-L 356 of 517 CUPIDO::STRITAR "Andrej Stritar,IJS,(61)-371-321" 114 lines 23-MAR-1994 08:02 CUPIDO::STRITAR "Andrej Stritar,IJS,(61)-371-321" 114 lines 23-MAR-1994 08:02 -------------------------------------------------------------------------------- From: STENAR::STENAR::MRGATE::"X400::1=de::2=d400::3=tr::5=EDU::4=METU::4=CC::4=VM::6=owner-mount-l" To: CUPIDO::STRITAR CC: Subj: Headlamp Regulator PCB's are ready From: NAME: Mountaineering Discussion List MOUNT-L FUNC: edu <6=MOUNT-L@4=VM@4=CC@4=METU@5=EDU@3=TR@2=D400@1=DE@X400@STENAR> To: NAME: Multiple recipients of list MOUNT-L FUNC: edu <6=MOUNT-L@4=VM@4=CC@4=METU@5=EDU@3=TR@2=D400@1=DE@X400@STENAR> RFC-822-HEADERS: Comments: Comments: Comments: Comments: To: MOUNT-L@vm.cc.metu.edu.tr, cavers@CS.YALE.EDU Date: 22-Mar-1994 Posted-date: 22-Mar-1994 This is a follow up posting. For those who missed previous postings see below. The printed cicuit boards for the headlamp voltage regulators are ready. I have parts for kits or assembled and tested units. If you have a good thin point soldering iron and a little soldering experience, the kit should be no problem. If in doubt or lazy, I suggest a A&T unit. Prices are as follows: Schematic and Documentation Free Email willie@cs.indiana.edu Bare printed circuit board $10 Kit: PCB plus parts $20 Assembled and tested $30 Low power alkaline battery version add $5 This price also includes shipping via US mail. Let me also explain that the kit will include all the parts for the PCB but not any external stuff like wiring, power switch, box, battery holder, etc. Since this regulator can be used with many types of batteries and bulbs, it is up to the user to select the battery and bulb combination that suits his needs. There seems to be some confusion about what batteries should be used with this regulator. This unit will NOT work correctly on 3 AA's, 3 C's, or a 4.5 volt pack for the Petzl users. I suggest 5 AA's with the $5 low power option using the Petzl standard bulb (3.75 volt 0.22 amp). My mountaineering setup is in a separate neck slung box which can be plugged into a Petzl headlamp when needed. This way the Petzl headlamp can be used normally or with voltage regulator pack. For cold mountaineering trips, I can not over emphasize the need to keep the alkaline batteries warm. Head mounted batteries will not work properly in cold weather! I will take requests for "turn key" battery boxes with a regulator built inside that plugs directly into Petzl headlamps for climbing use, but presently I am not building them for general consumption. For a rechargeable system, I suggest packs of 5 NiCad's or a 3 cell lead acid. This is much more important for higher bulb wattages for cycling or caving. Petzl halogens (3.75 volt 0.5 amp), HPR 50's (5.2 volt 0.85 amp), or HPR 36's (5.5 volt 1.0 amp) make a good lamp choice for higher these higher light needs. There are many other possible battery and bulb combination that will work well too. If you have questions about it, please Email me. I am currently testing a 6 AA's system since 5 cell battery holders are unavailable. This system is not designed for 12 volt use but it can be modified to work for one. Again, Email and I will send the pertinent info. If you have not looked at the documentation, please Email me and I will send a copy. Finally, to order send a check or money order to: Willie Hunt 1600 Maplecrest Bloomington IN 47408-1253 I will send stuff COD, but you will pay for the COD charges. Also any order will include assembly instructions including a PCB parts placement diagram, a revised schematic (showing the part values provided in the kit or A&T unit) and other assembly and wiring details. The low power option includes 2 large caps for C6 and CMOS 555's (see documentation). Willie Hunt ----------------------------------------------------------------------- For those who missed previous postings: I have a schematic and documentation for a high efficiency voltage regulator which provides constant brightness lighting over most of the battery capacity. This regulator can be used with various types of batteries and bulbs to deliver almost all the availible power from the battery to the bulb without variation of brightness. I have used this regulator for caving for over a year now, and mountaineering since last summer. For mountain trips I find it to be invaluable since it more than doubles what I consider the useable capacity of 5 AA'a alkaline batteries running a 0.8 watt bulb. I get 13 hours of light vs. about 4 hours for 3 AA's running the same bulb. This means I can carry far less weight in batteries for a long trip for the same number of hours of headlamp use. For caving, I use 6 volt 6.5 AH or 10 AH rechargeable lead-acid batteries with a 4.5 watt halogen bulb. I get 9 hours from the 6.5 AH pack and 16 hours from the 10 AH of constant brightness light. I am so spoiled by the brightness that anything less just doesn't let me enjoy the cave as well. I will send anyone who is interested the info. via Email, if you send me a request. The schematic is in postscript and the documentation in ASCII. If you don't have a postscript printer, I will send you info via US mail. I don't want to post the stuff to the group since the files are long, and I can answer question when you request the info. Willie Hunt
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