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x paul1598419 Yes, I need funds to build a new handheld laser and some machines that help me to build wonderful fireworks. This Linos BE mount lenses coated for the range of greenies only.

Hello forum. I'm selling this unique awesome masterpiece: https://laserpointerforums.com/threads/verde-volcano-a-dual-diode-build-520nm-2600-mw-optical-corrected-with-10x-linos-be.99439/#post1454620 This was a nice cooperation between me and CDbeam some times ago. It has only few hours of...

I have 2 KG KP batch stored into an hermetic container with some dessicant gel bags since one year and nothing happened. Chlorate and Ammonium Perchlorate, especially in sulfur presence, tends to auto-ignite. A little shake can also ignite the mix. But Potassium Perchlorate is much more safe. I...

In attachment You can find many original formulas of a great spanish pyros guy called Jopetes. As You can see, not all formulas reach the total of 100%. Sometimes less, sometimes more. If You like that the sum of all chems reach exactly 100%, You must recalculate the percentage of each chem, but...

No, not 2%. ... 2 grams every 100 parts. It is different. Here is the original formula: https://pyrodata.com/compositions/KP This is a very trustable database of EVERY working composition created and well tested. I changed the procedure but the formula is the same. If a thing works well, I...

Hello. The mix is right. Dextrin do not alter the properties of the mix. However I make a mistake that I have promptly corrected: 2 grams of dextrin every 100 parts of mix, not 2% .. sorry!

Hello forum! Here is another nice pyro-tutorial :giggle: This time I will explain how to prepare a powerful KP granulated powder. The same procedure can be applied also to make classical BP powder. Until the mix is wetted, there is no danger of deflagration, but when the mix is granulated and...

As a general rule, every operation with propellants and/or explosives must be done outdoor and far away from neighbors and buildings. There are many other basic rules to follow to reduce the risks of injuries, but shit can happen anyway, also to the most expert pyrotechnician. Yes, this is a...

... and now here is another 1Kg rocket with 5" shell containing double-effect stars: first red and then strobe:

Here is a 5" shell with strobe stars lifted by a 245mm rocket filled with my granulated r-candy mix. 1Kg total weight. Nice, isn' it? :beer:

Hello forum. As promised some weeks ago here is the first chapter of a complete tutorial how to make perfect r-candy powered fireworks. I switched to the granulated version for many reasons, and I'm very happy of my choice and for the good results. This is the first of many tutorials, and every...

Here is the LiPo cell: https://www.jonathan.it/batterie/pacchi+lipo/3+celle/fullpower/448087_batteria-lipo-3s-2200mah-90c-platinum-deans.html I will use two of them in parallel for fit issues. I know well the company and I already uses this awesome LiPos in my drones. This is the last...

Yes they are TVS diodes: https://www.mouser.it/ProductDetail/Littelfuse/15KE15/?qs=sGAEpiMZZMvxHShE6Whpu4qEjx03Bg%2fk4lDTIiZBxKU=

X-Wossee has gently created a circuit for me that can suppress all the unwanted transients and spikes from LiPo cells. So I will proceed to buy 9x 5.5A x-buck drivers from him and a 6000mA 30C quality LiPo cell (that can erogate 180A at 11.1V). I will use the 20mm copper modules from DTR and...

Oh my God Jason, your hand looks very bad. I suggest You a check in hospital, really! So, my main problem is not the moneys for 9 drivers (I wish to use 9x 5.5A Blackbuck drivers new release from x-Wossee), but the possible spikes and transient using the 3S LiPo pack. Really, with these kind of...

So, I'm in a dead end. Also putting 3 or 4 diodes in series with 3 or 4 LM338 will generate a lot of heat to dissipate and complicate the circuit a lot. This is the latest message from x-Wossee about the LiPo voltage spike issue: "Transient voltages suppressors are a separate class of devices...

x RedCowboy and Paul: I received another interesting reply from the creator of the BlackBucks drivers, x-Wossee. About the voltage spikes: "Most likely You meant inductive voltage spikes that come from mechanical switching ringing. I see one simple solution for this: an electronic power switch...

Good find Alaskan, but the price is a little bit high ... I have just received a response directly from the kindly russian guy x-Wossee about his new ACS5500BU 5.5A buck laser diode driver: "I tested them at 17V input voltage, and they worked perfectly. I'm sure there will not be any problems...

DTR, so the issue will happen also in the new ACS5500BU 5.5A buck laser diode driver? I have this LiPo pack: https://www.ebay.it/itm/RC-Turnigy-5000mAh-3S-30C-Lipo-Pack-w-XT-90/112772851728?hash=item1a41c92810:g:nfIAAOSwqaJaaCwl This kind of LiPo pack is a 30C, so 30x5=150A! So, there is a...

Thanks Redboy! So I will switch to the new Blackbuck driver by X-Wossee that seems to support the LiPo packs...