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Recent content by skjult

  1. skjult

    25mm heatsink?

    They're rated 2AH and the module draws about 1AH. Probably higher draw than what they're designed for but will start with this and go from there.
  2. skjult

    25mm heatsink?

    Here's the mod'ed Ryobi battery. Long dead so no loss. Also, 11 years old, so I don't think the charger circuit was worth trying to replace the LiPo cells. Using 6 AA NiMH batteries fully charged is 8.4V, drops to around 7V when depleted. So far has powered the 7W 450nm module well. I just...
  3. skjult

    25mm heatsink?

    I think what I'm going to do is buy some copper pipe, cut it into sections about 2" in length, then slit lengthwise. Bend each successive section into a sleeve to fit around the next. As long as there is some pressure through friction, there should be thermal transfer. I could solder it all...
  4. skjult

    25mm heatsink?

    Looking for a 50-60mm heatsink "sleeve" for a 25mm module. Aluminum, so not too heavy. Finned or not finned. Gutted this old Ryobi flashlight and a dead battery pack. Looked at building into it a 7.4v LiPo battery pack, but going to go cheap at first and try a 6AA holder with NiMH cells (8.4v...
  5. skjult

    The Big Ugly

    If someone's done this, please let me know. Rather than a bunch of hosts, I'm intending to build a single large host that will serve as a test platform. The idea is to put a single large disc (e.g. 4-5" diam., 1-2" deep) of aluminum up front, and sink into that several cavities for 12mm...
  6. skjult

    Siemens HeNe glass tube LGR 7641 & Metrologic PS type 37157

    Thanks much! Will be interesting to see how that old potted power supply powers up after 20 years in storage. May stand back several feet.
  7. skjult

    Siemens HeNe glass tube LGR 7641 & Metrologic PS type 37157

    I found this ref to the power supply. Looks like black is common for the input ground and laser cathode. Thanks for the info on the Siemens tube. I found some photos that confirm this.
  8. skjult

    Siemens HeNe glass tube LGR 7641 & Metrologic PS type 37157

    Look what I found in my goodies bin. Made in West Germany - so that tells you the age. I think I picked these up in the early 90s. I recall they worked but I’ve misplaced the instructions on the power supply. If you’ve seen one of these let me know the color codes. I believe it is black -, red...
  9. skjult

    He Ne i built in 7th grade. Still proud of it but diodes are just amazing.

    Great story. I have to find the .5mw HeNe unit I built ca. 1985. Got the tube at a ham radio "hamfest" and forgot where I found the power supply - probably from the back of Radio-Electronics magazine. I seem to recall I spent around $50 for each, which was around 5-10 lawn mowings back then...
  10. skjult

    MY 2nd D.I.Y Flat Diode Build (PICS)

    Here are some cheap ($4) batteries with USB chargers built in! Clearance: http://www.shop.goodprophets.com/product.sc;jsessionid=4B3531E6ACB85A20780388FC5BFE2037.m1plqscsfapp03?productId=336&categoryId=1
  11. skjult

    MY 2nd D.I.Y Flat Diode Build (PICS)

    Now these are cool! Expensive however... $50-$70. Variable voltage and current. One of these and you could construct endless laser heads... VapeOnly vPower VV 14500 Mod KIT another: Vamo VV Mod V2 and another: Vmax VV Mod
  12. skjult

    MY 2nd D.I.Y Flat Diode Build (PICS)

    Here is the circuit that is commonly in these devices: eGo-T Circuit Board I've several of these boards. The claims are 2.2A max current. What's nice is you can leave the battery in place and charge from the output connections. Given that I paid about $2 for the boards, I won't mind...
  13. skjult

    MY 2nd D.I.Y Flat Diode Build (PICS)

    I knew someone else must have had the same idea! What's cool about these batteries / accessories is there are many mods out there with threaded adapters of various sizes. I use one that takes a standard 18650 cell and provides threading for the standard "Ego-T" atomizer. I've a couple of...
  14. skjult

    Cheap charging adapter for "D cell" 32600 LiPos that are really 32700

    This was the ebay retailer from whom I purchased them - and the same item up for auction: [USA] New 32650 Rechargeable 3.7V 5500mAh Li-Ion Batteries battery lithium-ion | eBay I cannot vouch for their rating or longevity. They appear good and take a charge well. I have not used them for more...
  15. skjult

    Simple battery voltage monitor?

    Even more useful, perhaps, is a current monitor. These are basically the same thing, measuring (I assume) voltage across a known resistance (the shunt). I don't know if they are modifiable for, say, 1 amp, but I guess you could divide by 10. :-) 0.36" DC Digital Ammeter 10A Red LED Panel Amp...




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