I thought it was about time to post these videos ive made so i did! my very first forum post!
Topic by The 4th Doctor | last reply
I have an Arduino Duemilanove and was wanting to know how and/or what I need to do to create a high frequency signal. I dont have a set frequency in mind but would rather know how to change it so I can gradually step it up until I get desired results.....Have looked at a lot of stuff on google for how to do this and most refer to a wiring.c file but mine appears to be an updated version to what they have...Anyways any help would be greatly appreciated =)?
Question by afreeland | last reply
I'm going to attempt to make a super micro tesla coil that is 100% contained (unless it runs off of like 12 volts dc, then I'll use a wallwart). Of course, one of the i biggest problem is the power supply. So this is what I'm asking, what's the best way of ramping up the voltage? A tiny toroid transformer? An inductor that gets pulsed? Voltage Multiplier? Something with static electricity? Some type of Inverter? Using Greinacher Cascades? A marx generator hybrid? Other stuff I havn't heard of?
Topic by guyfrom7up | last reply
I'm starting to work with high voltages again, but for real this time. I just built an ignition coil driver, using a 555 (and I got an ignition coil), but my 555 broke (the texas instruments ones can only drive 15mA, oppose to the normal 200mA, oops) so I have to go buy one today. My main question is what to use for ground, whether it be for an old screwdriver for arcing sparks or the secondary of a tesla coil. I was originall just going to use the 3rd prong of an outlet, but somewhere on the internet I heard this could destroy all surge protected power strips and destroy all plugged in electronics at your house. I, of course, do not want this cause... well... I'd be screwed. Is this true or not? Can I use the 3rd prong?
Topic by guyfrom7up | last reply
Before the begining sorry for bad english I want to make laser tag with electric shock when hits This is circuit of taser what I want to do is remove the switch and replace with wire so that the taser can charge automatically then I want to put a phototransistor(that react to red laser) to the poles(where you get shocked when touch them together) but because the both poles are attached to bodies the taser can't be charged so I tried to block one side of pole with phototransistor but when I touch the two poles phototransistor burned(?) and I got shocked in this case what can i do?
Topic by hyeok205 | last reply
I'm wanting to build an electronic version of the popular carnival game High Striker. I would like it to be done with LEDs as the way it displays the power of the strike. This way i can arrange them however I need to. It's going to be themed to look like lightening, so they won't be in a perfectly straight line. Thanks in advance for any input.
Question by Dustin Cox | last reply
I need to measure Current from a welding machine to make a alarm if it goes down below some level for ensuring better quality of welding. The current normally set is of the order of 200A max with around 100V DC.Not sure if i could use some clamp-on meters and pass those values out to Arduino for switching circuit. Shunt resistors may be a better option. But to make a signal conditioner to convert the ma output will be a problem i guess..is there something i can do with Arduino.. any ideas guys....? Thanks in advance Chuppandi
Topic by chuppandi
I am creating a circuit and I need a not gate to run 20 3v 20mA LEDs. The only problem is that to run all of those LEDs (4 series circuits in parallel, if that will help) I am using 18 volts (2 9v batteries in a series). My circuit is compact (,think fitting inside an Altoids container) so a relay wouldn't work. So I need a high voltage way to make a not gate. I can read schematics if that will help you explain it, but I do need you to mention the ohms of the resistor. Thanks a million!
Question by GenAap | last reply
Im about to go into 8th grade and i have to start thinking about what high school is right for me. i love science and weather, i think i want to be a meterologist. i live in glassboro new jersey, and i need a high school that is close. i cant go to glassboro, i cant go to pitman because i dont live there, olma; pvi; and glouster catholic are too much money, and i cant think of anymore high schools...do you know any high school that is good for me?
Question by megan_loveee | last reply
i need to add another power cord to my HV Transformer it does not look like it has any difference in which way it is wired could i just connect the power cord to it and in the second picture is the screw the ground to the case or can i just gound the case itself to a pole in the ground for example
Question by MonstaM | last reply
I found the low volt side of the transformer but when I attach the second terminal of the 9v it sparks at the battery and not on the high volt side. Help!
Question by 2tautges | last reply
I need to know because I may be using one as my power source for my Tesla-coil.
Question by nerd7473 | last reply
I am in need of a power supply that can give out about 500V @ 13A. I know it's high, but I want it to charge a capacitor(400V, 1000μF, 13A) for my coilgun. I've already tried a flyback charger, but the result was to blow the capacitor up(I think that it couldn't withstand so much voltage, despite the amperege was lower that its threshold). I don't want that to happen again and I want a relatively fast way to charge the capacitor. Also, the power supply needs to be portable. Another thing: the voltage is not mandatory to be THAT high; the amperage also(let's say...1 or 2 amps...)... However I need DC pulsating current, at 20 kHz NOTE: I really hope that I'm not asking too much.......
Question by N3v3rm0r3 | last reply
Hi, I plan to build High Voltage of 4KV. The output current is very low (say 100uA). I intend to use this as focus voltage in a CRT application. Hence, I am exploring the ways to do so. I have seen people building high voltage (8-20KV) using transformer followed by voltage multipliers. Now a days, MOSFETs are available which can withstand voltage upto 4.5KV. So it should be possible to create boost converter which could boost 300V to 2KV. Then one can further boost the voltage using voltage multipliers. The input voltage of 300V is achieved by rectifying the line voltage of 220V/50Hz. Visiting internet, I do not see anybody doing so. Hence I wonder what could be wrong in doing something of this kind. Could somebody elaborate ? Regards, Hardeep
Question by hardeeps | last reply
Question by ruimoniz | last reply
I found an old monitor which i am pretty sure that it is not broken and it works now i wana use the high voltage output using the monitor driver but i dont know form which part should i get the high voltage please help me i need this immiedtly thanks
Question by maaktabkh | last reply
Is it possible to produce very high voltage from a single transformer which having very low input in primary side and large number of windings in secondary? why not?
Question by albiemorkal | last reply
I need a portable and efficient way to convert battery power (3 volts) to around 400 volts. I will be using alkaline batteries... This will be used to charge a high voltage capacitor bank.
Question by brooklynlord | last reply
I recently just got a hold of a Allanson oil ignition transformer, the output voltage is 10,000 volts at 23 ma. the power cord was cut so i have to connect another power cord. what gauge or metal is recommended for the output terminals and can i attach a power switch to the 120 A.C. volt line. i was planning on starting off making a jacobs ladder then later on making a tesla coil after i have worked with high voltage a little bit longer are there any more uses for the high voltage transformer i have
Question by MonstaM | last reply
Question by ms10 | last reply
Question by ravebot | last reply
For a project totally nonrelated to my tesla coil I need a way of regulating a voltage down to 36 Volts at 8 amps. My transformer (or a bunch of transformers hooked together) is suppose to have an output of about 38 volts at 8 amps, yet the voltage (with no load) is actually around 60 volts... Basically I need a way of regulating this voltage. For saftey, lets say the max input is 70 volts and it should be able to handle 10 Amps. The output voltage should be 36.
Topic by guyfrom7up | last reply
I'm looking at some instructables, and the simplicity of the cockroft-walton generator is quite interesting. Because I've always been fascinated by lightning and electric sparks (ever since I saw a wimshurst machine as a kid), I was thinking of building a CW generator, to power a small marx generator. Now, I found the parts, but I don't know much about electronics, so I have a few questions, and I was hoping someone here could help me out. 1) For ceramic capacitors, some are labeled for instance '15kV', while others are '15VDC'. I assume the latter only work for DC input, is this correct? 2) If I were to make a CW generator using a few 400V capacitors and a fuse (assuming I don't f*k up putting it together) like this: https://www.instructables.com/id/High-Voltage-Power-Supply-For-Marx-Generator/?&sort;=ACTIVE&l; imit=40&offset;=80 Is there a risk of blowing a fuse in the house, or is that fuse in the setup enough protection? 3) Is there any risk for other electrical devices, like a computer, when I plug this in? 4) I work at a computer repair shop, are there any useful components in power supplies, old screens...? Thanks in advance!
Topic by cgpirre | last reply
I have a high voltage lamp driver that i took out of an old projector, I want to know if i wil be able to make a jacobs ladder or plasma globe with it? It supplies 25kv or 12.5kv on each of the two wires? it was used to power the lamp of the projector and it connected directly with the lamp wires. PLEASE HELP!
Topic by Francoisler
I've wanted to do this for ages: build a solar stand for a strawberry planter (or it could be for any other plant) with an extremely low RPM. I'd like it to rotate once every 48 hours so that over time all the sides get equal sun exposure. I'd also like it to be solar powered..... All the motors and kits I find are on hobby sites and they're tiny little things (plus even the high torque ones have RPMs above 1). I thought of using a clock mechanism, but there's no way it could handle the weight.... Any ideas where I could find what I need? Thanks!
Question by belsey | last reply
I bought a couple of red "Coast LED Lenser" LEDs from Frys (www.frys.com/product/4137893). They are in the standard 5mm package, but they give no forward voltage and the mA looks a bit high, being without a heatsink . If anyone can tell me if it looks correct and not a misprint, i would be very grateful, since coast doesn't have them on their website anymore. Oh yeah, while trying to light one I ran 8.5V@4.5A (PS2 adapter) accidentally (forgot the resistor) and it exploded loud pop instead of melting or burning out the junction like the 3mm LEDs from ebay, if that helps. The specs. Intensity : 10,000 mcd Directivity: 15* (degrees) Operating Lifetime: Up to 100,000 Hours Wavelength: 620nm IF30: mA IFP: 100 mA VR: 5V PD: 120 mW Topr.: -30* to +100* (degrees) I'm guessing the forward voltage would be about 2.00V +/- .20V
Question by LuciferTengu | last reply
I was going to try to build my now 2nd coil gun but this time wanted a solid state switch. after looking at the following: https://www.instructables.com/id/50-cal-Coil-Gun/step3/The-Design/ i was wondering if an 800A SCR is really necessary or can i just use a 16A SCR?
Question by MadScientist101 | last reply
Okay so i'm making a railgun, and need to get capacitors. Should i go with the ones in the 300-400 volts range, or somewhere around 15-50 volts? I would rather go low-voltage, as they seem to be alot cheaper. Also, how would I go about making a charging circuit, schematics would be nice.
Question by LiquidLightning | last reply
I am trying to make a power 100-200kv power supply. I plan to do this by putting the positive output of a 7.5 kv flyback transformer through a cockroft walton multiplier. I have never done something like this before, so I am not completely sure about everything. I plan to make the multiplier with 14-15 stages. I thought that it would be okay to use 10 kv DC 1000pf ceramic disk capacitors in the multiplier. One thing I'm not sure about though is whether or not the flyback outputs DC or AC electricity. I assume it is DC since the input is rectified, but if it still is producing AC then I should probably use 15-20kv rated caps. The main thing is that I don't know what diodes to use. I thought I would use 1N4007 or something similar but the peak reverse voltage is only 1 kv. Does anyone know what type of diode to use, and where to get it at a reasonable price (below $2 per unit preferably)?
Question by Higgs Boson | last reply
I have bought two 75N06 MOSFET's rated a 75A that I am intending on using in an inverter circuit I will build the inverter will be powered with a 9v battery that will only trigger the MOSFET's that will lead to a modified microwave oven transformer and a car battery (65Amp). With the car battery I intend to draw about 200Amps from. At 50-60Hz the MOSFET's( I'm guessing) will be able to take that current but I am not sure if the pins will be able to handle that current the pins are only 0.34mm(0.01339Inches) by 0.6mm(0.0236Inches) thick so will it be able to handle 200Amps? If not could you suggest how to do this possibly with a few lesser current MOSFET's (lesser will equal a bit cheaper) in parallel? Thank you for any suggestions.
Question by The MadScientist | last reply
I've had a long, hard journey to try and get my Cobra CB to transmit properly. Let me explain. My radio never has been able to transmit properly, and my friends with their CBs (they have the same kind as me, and their SWRs are fine) can't even hear what I am saying if we are parked right next to each other. This is very surprising, because I have a 4 foot long Firestik antenna. So I borrowed my friend's SWR meter and measured my SWR. I have well over 3 in all channels, which is WAY in the red. I immediately printed out Firestik's high SWR troubleshooting tips, and did everything it told me to do. I tried tuning the antenna as usual, I tried checking all the grounds and connections, and even changing antenna positions. Nothing helps at all. I was still in the red, and my friends could not hear me. I thought that maybe my antenna or coaxial cable was at fault, so I borrowed my friend's working magnetic-mount antenna to try it out. With the different antenna, my SWR was worse. Finally, I decided to just get a new radio, because maybe mine had a fried resistor or something. So i took my CB back to walmart, and successfully exchanged it for a brand new radio (without receipt or original box, for that matter). And just my luck, the new radio STILL has a super high SWR, in the red, the same place as before. I am all out of ideas. I have searched the many CB and off-roader forums on the all-knowing google, and nothing helps. Does anyone have ANY ideas on what I can do?
Question by masterbuilder | last reply
So I have been doing a lot of math for a rail gun, and I finally found out what statistics I need for the capacitor to get the energy needed. But I may have ran into a problem. The voltage for the system is rather low, but the current is high, so I need a capacitor with something like 60-ish Farads, and 20 V, and of course the ones I find are outrageously expensive. ($2,400!!!) But I was able to find ones with 70 F but only 2.1 V, but since I need 20 volts I was thinking that I could use a voltage booster, but I am not sure if that would work, or if I can find/make a Voltage booster that can withstand that kind of current (would be something like 67.5 KA) the other option is find ones with higher Capacitance, which I did, but they are still a bit on the expensive side ($70, and since i need to it comes up to be $140 or so (not as much but still)) So what I wanted to know is whether it would be less expensive to try to find/make a voltage booster, or just buy the $70 capacitors? I suppose I should also be asking is it even possible to get a voltage booster that can that that many amps, and how easy would it be to make? Oh almost forgot, another question (which would skip having to solve the others) is: Is there a way I can increase the voltage that a capacitor can take, or increase the voltage in a capacitor bank, or some variation of those? Because if there is, that makes everything easier, but I couldn't find anything on doing that so yeah...
Question by Mecknavorz | last reply
I threw together some more vids with significantly moar powah, enjoy! interesting note about the cd explosion according to my science the edge of the cd was traveling around 420mph i also have another cd explosion vid on my channel but this ones much more impressive
Topic by The 4th Doctor | last reply
Question by nerd7473 | last reply
Does anyone know or can tell me where I can get information on how to get High Powered LED's to alternate flashes like wig-wags for a vehicle?? Wondering what I need and how to wire it. I really wanted to have about 3 or 4 high powered LEDs (either Luxon Stars or something of the sort) on one side and 3 or 4 on the other side, and each side to alternate flashes back and forth. I need help at a beginner level and Any help is greatly appreciated. Thanks
Topic by CrazyBob62 | last reply
Hi,In the valentines group there is not a link to sort by rating or hits so here are the links.Basically you just have to add something to the end of the url.For Hits?show=instructables&sort;=HITS_TOTAL&limit;=500&offset;=For Ratings?show=instructables&sort;=RATING&limit;=500&offset;=Here are the links.HitsRatingsThere you go. I guess you could add this to any group and sort by Hits of Ratings.ThanksJoe
Topic by joejoerowley | last reply
Question by Beautiful Emperor | last reply
I would like to pull in a High Definition signal well enough so the picture doesn't freeze. I'm using HD rabbit ears?
I took the two photos below last year, and I want to try a few more for a new project. My rig is simply the flash unit out of an old disposable camera, rigged up to a microswitch. For the falling coins, they landed on a tilting platform with the switch underneath, so that the first coin to hit bumped it down into the switch and fire the flash. The droplet was just by setting the faucet to drip and poking the switch manually and getting a lucky shot. I'd like suggestions for what to try photographing next. I'd prefer something that can activate the flash by simply pressing two contacts together (i.e., a switch), as I haven't had much luck building light- or sound-activated triggers. UPDATE so yeah, I totally this in before spring break and forgot to mention it. The project was a magazine cover, don't knock the radd grafics dezine skillz.
Topic by CameronSS | last reply