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What would the cheapest lpa (low pressure air) system be priced (paintball) ? Answered

I'm going to be buying a JT USA Cybrid that operates on low pressure air systems. I need to know what a cheap LPA System would cost. I haven't found a cheap one yet, but I know their out there.

Question by Paintballer98    |  last reply


Wave JT Kit - LED Chaser with Joule Thief - Sale

Wave JT is an LED chaser/Larson scanner/sequencer what runs with just one AA battery. Joule Thief circuit boosts the 1.5V (or less) from the battery to 5V to power the microcontroller and LEDs. The kits are available at $19. PCB alone is $7. *** Summer Sale Price *** > see the instructable > go to my website for purchase

Topic by ledartist  


what is the cheapest way to make a AA joule thief HV?

After trail and error i have made a joule thief with the following: 2n3409 transistor, 1k ohm resistor, led, and an air coil. what would i need in order to boost the power up to say 100v or more? the cheaper the parts the better, at least for now. I've read some what about micro controllers and using 2 555 times, but i am unable to use anything that requires a computer. everything needs to be simple enough to be used via a bread board. I am desiring high enough frequencies and voltage to jump a small spark gap. i am aware the spark is waste, but that is the point.

Question by freenergyfuture    |  last reply


programable led

I have a project that requires a board with multiple led's that each led can be programed to blink at specific frequencys. i then will run plastic fiber optitics to the location where the light is to display. i have no idea were to start with this.... so i ask - jt

Topic by wavejumper    |  last reply


Joule Thief in between Peltier/TEG and DC Motor?

As per the title I've got a Peltier cooler chip sandwiched between 2 heat sinks acting as a Thermoelectric generator (TEG) which when sat on my wood burning stove generates about .5V (which is a bit disappointing).  The idea was to cheaply recreate one of the EcoFans, so the plan was to connect the TEG to a low voltage DC motor.  The obvious issue is the low output from the TEG itself - I need to maximise the heat dissipation from the top heatsink to create the temperature difference, but even solving that I'm going to struggle to consistently get more the 1V from the TEG. Before I go to the hassle of sourcing and making a Joule Thief (like the 1up instructable) is there something fundamental I've missed that means either the TEG won't work with the JT, or a 1.5V - 3V DC motor won't work with the JT? Appreciate any help is establishing the feasibility of this idea, or suggestions to an alternative solution :-)

Topic by thankyousam    |  last reply


Good Paintball Mask?

I have a cheap jt paintball mask that came in a kit with a cheap pump gun I got a while ago.  The mask is just short of 1/8" thick and made of bendable plastic.  It offers protection from paintballs at 200fps but I am not sure about higher velocity guns.  It can only protect against up to 300 fps. So could I use it for battles with semi auto guns like viewloaders, tipman 98s and so on (beginner/intermediate guns)? or will I have to purchase a new one. Note: I have long since lost the manual for it.

Question by hunter1125  


Non-permanent wall paneling?

So I got the idea from this photo: http://ak-images.jackthreads.com/v1/image/969357/size/jt-product_zoom I was thinking how it'd be neat to put some kind of wood paneling like this around my bed, maybe toss some LED strips along the top for an added effect. I'm trying to figure out a way to do this that won't be too expensive nor permanent (I'm renting my place so I need to be able to easily remove it when I leave). My thought was I could get the wood, stain it and then just screw it into the wall along the corners (or maybe even nail it if it's thin enough?) My alone concern with that are the screws/nails will look out of place, unless I'm able to stain them as well? If anyone has any other ideas on making this happen I'd really appreciate the help!

Question by cardboardlion    |  last reply


frequency tesla coil function a? IRF9130? circuit cold electricity?

At what frequency does a basic tesla coil function at? how does the IRF9130 fit into the circuitry when it only has 2 posts? does a circuit require a spark gap to induce cold electricity and what frequency does it first take effect? I will be putting together several joule thief's and after i get them to sustain each other i intend to use the circuit with the IRF9130 to power a tesla coil. i also intend to use the JT to power an E-bike that is fast enough to travel on the highway's. any help is greatly appreciated! also, what is a Batt-cap? and where can i find them? the batt-cap in question is stated to absorb all of the batteries power and recharge it after it is fully depleted. source from:http://free-energy-info.co.uk/Chapt5.html

Question by freenergyfuture    |  last reply


Fun, free "DIY Summer Reading Camp" just started from Education.com

Hey everyone, I work for Education.com, and we just kicked off a super fun (free!) camp we thought the Instructables gang might love.  It's a DIY Summer Reading Camp. Everything you need to host a summer’s worth of fun for your kiddos, while also sneaking in a bit of learning that will keep them off the dreaded “Summer Slide”.  (Did you know that kids who don’t read during the summer can go back to school in fall up to THREE grade levels behind where they were when they left for summer break?  Scary huh?)  Each week has a theme your kids will love (“Bugs”, “Heroes”, “Make Music”, etc) and at least a dozen activities you can do with your kids using materials you likely have around the house already.  You can pick and choose which activities to do each week and you can go through the themes in any order you’d like. Enjoy! www.education.com/summer-reading

Topic by JT Eden    |  last reply


Pin-pointer metal detector front end not working.

Hi,I breadboarded the pin-pointer metal detector and am having trouble with the front end. pcounterA reads 11-14 on the serial port monitor.See previous question on instructibles reproduced below:_________________Asked by jont4e 2 days ago Hi, I bread-boarded your circuit for just the end coils to start, and loaded the sketch. It seems to be pulsing the coil OK but the leds aren't responding nor the buzzer. I uncommented the serial port code and it shows ledthreshold1 always at .97, pcounterA at 12, and calav1 at 81. Is this OK? (The other reported variables are always 1000.) I wound the end coils with some bifilar wire I reclaimed from a microwave HV supply transformer. I assumed that was OK? Do you have a flow chart or description of how the code works so I can troubleshoot? Any help or hints would be greatly appreciated. Jon T 0 Answer from TechKiwi... 2 days ago The pcounterA value should be much higher 200 to 800 at least. My advice is to focus on one channel. Try reversing the polarity of one of the coils as this often is the problem as the pulseIn function needs to have a clean leading edge to trigger the timing process. Ensure your breadboard connections to the coil are short and well grounded. If this does not work direct message me with a link to some photos of your setup and I will try to assist. I'm just building a second unit so your timing is fortuitous as I can provide some test measurements._______________________________Attached are images of the front end scope traces and a shot of the breadboard. Coils are off screen to the left.Swapping coil polarity did not seem to change any waveforms.Hope someone has some suggestions I can try.JT

Topic by jont4e    |  last reply