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Electrical components

Is there any components that set the minimum energy to pass through? When the energy is lower than the fix amount , no energy will be passing through.  I'm trying to make a project. I'll put a dynamo on my bicycle, and it will be connected to 3 LEDs. When I cycle in low speed, only one LED will light up. When I increase my speed to certain level, 2 LEDs will light up and if it passes a certain speed all LED will light up. Any idea?

Topic by GohC    |  last reply


I need help with few things and the main one is that i need some electrical components which are not available in my locality.If anyone living in india is ready to help me i will  be very thankful.

Topic by pranjal12    |  last reply

What is this electrical component? Answered

Can anyone tell me what this is? and if so a good site to by it. thank you!

Question by nfarrow    |  last reply

What are these electric components?

Hello guys I thought you could help me out with this a little bit. So I went to the dollar store looking for some. I'd like hack some to what I want, but first I need to know how it works! Um want to know what these things are on the board and what it is. So, I want to know what that black blob is on PCB and also that barrel shaped thing and why is the siren hooked up to that barrel. Thanks guys!

Topic by HavocRC    |  last reply

Buying components for the niftymitter?

I have the skills necessary to build it (from a digital electronics course at school) i just lack components... Whats the best place to get electrical components cheap with a low shipping cost? I have searched and searched to no avail...

Question by quellek2    |  last reply

Where can I get the components like IC`s, resistors, capacitors in Mississauga?

Where can I get the components like IC`s, resistors, capacitors in Mississauga?

Question by electropower    |  last reply

Need a list of places to get electrical components,other than online!!!

I need a list of stores that i could physically go into to get electrical components(transistor,capacitors,potentiometers etc.) AND I ALREADY KNOW ABOUT RADIOSHACK!!!

Topic by wesie42    |  last reply

Bulk/Cheap Electrical Components

I am growing tired of spending large amounts of money on few quantities of components. Are there any [trusted] sources to buy in bulk (for cheaper) from? I'd be more then happy to buy 1,000 LEDs for $20. That's fine with me. I'm currently spending about $2.00 on just 10 LEDs. Anything is an improvement. I'm trying to stay away from auction websites like eBay. Any suggestions are useful! Thanks!

Topic by freethetech    |  last reply

About the components of light ?

I just learnt that light consists of electric and magnetic fields oscillating at right angles to each other . Now my question is that why can't the electric and magnetic components of light interact with matter. For example why does not the magnetic component in light interact with a external magnetic field and bend toward or away from it. Also how do we tell the direction of magnetic and electric fields in light . I know that this question might seem really dumb , but i seem to have a great difficulty in understanding light and would be really satisfied if some could give or direct me to a detailed explanation. Thanks in advance ..

Question by Strontium    |  last reply

Electrical in code?

Hi, I came up with a new way of doing lighting and would like to post it as an Instructable. There's only a slight modification of existing components and standard electrical hardware is used, but I'm concerned I may be called out for possible electrical code violations. Are these checked by the Instructables crew or every project is treated with a warning that anyone using each project needs to be aware of electrical code issues? Thanks.

Question by aeyring    |  last reply

electric bicycle

Ok, i wanna take a old bike and put an electric motor on it, with a solar charged battery. what i wanna know is, what are my options on motors if i wanna use recycled components? can i use a motor from a; washer, dryer, blower fan, ect? i would like to be able to have something i can get around town with(not assisted)

Topic by golddigger1559    |  last reply

Help needed circuit components with different voltage

Hey, I have a circuit with different voltage components. How would I make all the components run on one battery?

Topic by xpalix    |  last reply

Where can I find the boxes shown in the picture for storing electronics components? Answered

I'm not even sure what they're called, bug boxes? 

Question by Spaceman Spiff    |  last reply

Electrical switch

I was wondering if theirs a type of simple cheep switch that would do this: electricity is turned on, a switch completes a second circuit but when original electricity is turned off the second circuit stays on. The first circuit gets power from an outlet but the second circuit runs on a battery But in diagram (I used paint it's the best I can do) I have both running on batteries. Dose any one know of an electrical component that would do this? Or is their any way I could build one for cheep? Thank you.

Topic by i make shooting things    |  last reply

Preferred/great electrical component distributors?

Hey there everyone, i'm trying to find a supplier for electronic components so i can do the Keeley Mod on my Boss DS-1 pedal, but most distibutors either don't have the EXACT specs. from the instructable, or they want me to order 2,000 (minimum) capacitors.

Question by noise_metal_freak  

estimate weight of components??

Im working on the conceptual stages of a weight sensitive project... but am currently away from my tools and components. So can anyone help estimate these two component weights:Electrical hook up wire per meter eg: 5mm and a 10mm LedThanks.

Question by davivid    |  last reply

a simple electric component that acts like a spark gap?

Is there a simple electric component that acts like a spark gap? something that will not conduct until a voltage is reached? i would like to replace the inefficient spark gap in the Tesla coil. also, also voltage needs to be very precise, the breakdown voltage across a gap varies for a clean oscillation. then, the coil should be less noisy.  

Question by -max-    |  last reply

help me make an innovative thing?

Hai friends,                   i want to create an innovative thing. i am having the components as listed below 1.12volt solar panel 2. Breadboard 3.5v voltage regulator 4.batttery 5.inverter display. with th help of these what can i create. please give me some good ideas

Question by rbavithr    |  last reply

Creative Uses For Random Components?

Self explanatory, I need some creative uses for random electronic components. Stuff like, using light bulbs as igniters and such.

Question by LiquidLightning    |  last reply

How Should I Organize Electrical Components

Like most electronics hobbyists, I have hundreds of different tiny electrical components lying around.  I've been looking for a simple and relatively compact method of organizing them, but I can't find any that I like.  Any ideas/suggestions?

Topic by jimmy dean    |  last reply

Arduino Projects Without Any Electric Component?

So Yesterday I Ordered An Arduino Uno R3 ATmega328p So I Want To Learn Some Projects ASAP So I Can Show Someone That It Is Not A Waste Of Money.Are There Any Projects Which Don't Require Any Electrical Components?And Please I Don't Need One Suggestion Saying That You Can See A Light Turning On And Off (I'm Tired Of It).Sorry If This Question Is Already Asked (Link Me There).Or If You Know Any Article(s) Link Me There.

Question by VruttantB    |  last reply

Safe component sellers?

First off a Question for site/community, then I will lead into the reasoning/need behind the question. Do you or someone you know in the community have kits you put together to sell yourself or do you utilise a site, that contain the major orange bold parts most of the robots require? If no are there any the community would recommend that are reliable for multiple purchases. For instance I wish to build a Autonomous turret, is there a person who collects the parts and makes kits in this community, or a site that does this?  The kits may consist of things like 1x TTL laser diode,1x LidarLite V2,8x XT connectors  and 2x PWM driver board.     Or do you have a affiliate you use who do kits?.Are there any specific sites you have given on the orange links that you recommend or trust? In the sense that my overseas purchase will be as safe as if I made the purchase from a local retailer from Australia? (eg if a incorrect or broken part arrives they have a system that overseas customers aren't going to be held financially accountable for return of incorrect part or for the replacement/s?   For instance, the  autonomous sentry turret will cost 240euro more buying via separate websites as a  part by part job .Essentially adding $600au because I have to get 8 companies to post 8 separate items with 8 separate international insurance and postage costs added., Clicking external orange links leads me to about 7 or 8 different websites to purchase these items, so I would like if possible a list of those website you trust and recommend for the purchases, or maybe even a site that if kit's are not available that if  I give them a list,  they would be willing to put the effort in (after i prepay of course) to gather and send as one order, rather than what i currently will have to do, and purchase from 8 different stockist. When I say parts, I am referring to the orange parts on any given job, (not the grey ones you can pick up from local hardware/electrical store's but the orange ones) I can go to Amazon( Us version of the site not the Australian version) and make a few purchases for items in bulk, but not being the Australian proxy of the site, I may end up having electrical items disallowed because of local restrictions( eg I have been warned that the  purchase of lasers for domestic/personal use maybe illegal in Australia, if the laser in question can be modified past a certain power output.) REASONING/NEED BEHIND MULTI-PURCHASE/BULK PURCHASES. I have selected 15 robot/autonomous type projects, which I intend to put into one drone of sorts to make myself a remotely controlled android/drone for specific purposes.   it will be a slow process as I teach myself, enlarging power supplies for multi purpose drones, learning about multi system networking instead of expecting one system to control the whole drones etc, it may take me 1 year, it may take me 10 years but the idea's I have can't ever eventuate if i don't begin the journey, so for now, this is the first step.  Essentially I wont need to purchase  every item from the 15 task's( overlap double usage items  etc) but there will be allot of parts which will be single use parts, and allot of parts which I might not even need later on to multi link, but to make the original robot/design I will need them.

Question by cozzzaaa    |  last reply

Can someone explain the workings of this charger schematic?

I took apart my Black and Decker cordless drill charger, and drew this schematic to my best ability. I am trying to understand it to my best of my ability and what each component is responsible and how it charges the battery. From my understanding D1 only allows energy to flow to the battery. But if the potential of the battery is lower then the charger's shouldnt that be not a problem? Since it will always be more and push the electrons to the battery? The resistor and the LED are understandable, but the job of NPN (might be wrong ) transistor is a mystery to me.

Question by Eax5    |  last reply

What is this component? is it a solid state relay? Answered

I want to know if it is a solid state relay. i got it in an old photocopier matsushita. on the component it is written  sf16drz-h1-4 input    DC4~7v OUTPUT  AC 210V 16A K975c MITSUBISHI Electric it has 4 leads out. 2 small and 2 big. I googled it but no success and if you know explain to me how this component works. it has  a large heatsink on the top

Question by ARJOON    |  last reply

Children's Electric Car

I started to build a pedal car for my granddaughter and fell victim to "Project Creep". What started off as a simple, standard style pedal car modeled on a Type 59 Bugatti grew to a 6' long soapbox style car that will need an electric motor to move it.  I am a DIY guy and i have the plans, materials lists (it will be wood) and motivation.  What I don't have is a parts list for the electrical components nor do i have any idea how big the motor should be, e.g. 500W, 750W,750 gigawatts.  I wish there was just a kit that had all the components from accelerator pedals, gears, motor and a way to connect the whole thing to the 16" bicycle tires.  I don't need it to go 20MPH (she'll be 4 by the time I'm finished) but i don't want flimsy - i tend to overbuild things: why use two bolts when three will do? So, the question is what do i need and where do i get it - the first part is the most important.  I promise i will document the whole project with pics and words from concept to test drive - but i need help.   

Topic by RBaderG    |  last reply

Getting kids interested in Electrical Engineering program

Getting kids interested in Electrical Engineering I am starting an entry level program for High school students in Electrical engineering. This program is going to be run in the upcoming summer. I believe it is going to be over a course of one month in July. I would like some help from you guys. I am trying to come up with list of topics and activities to cover with them. This is what I have so far. Voltage, Resistance. Explain different components and their functions Have a few activities with the components that I will introduce. So does any one know any topics I should cover and different activities that would supplement the topics.

Topic by DELETED_kclv1988    |  last reply

Help requested for purchase of components

Hi. I'm a newbie to embedding but I have a project that needs this and there is no commercially available solution that I can find so I need to learn how to build it myself. This can and will be done in modules... I figure I can tackle one task at a time until I end up with a complete working system, but use the system in the meant time, as I get it completed. The main goal is for an electric motorcycle conversion dashboard,  which will include a password protected relay switch "ignition key" to power the vehicle on securely (Task #1), a user configurable display to show speedometer, odometer, tripometer, clock, battery pack voltage, motor rpm/temp, controller temp, coolant temp, etc via a waterproof rugged tablet (probably a Windows 10 tablet, probably with an Android emulator installed). I'm finding that there are so many different options available, I don't know what to purchase. I want to spend my hard earned money wisely and just buy what I need the first time. Instead of learning the "hard" way, I want to learn the "smart" way. Please help me get started. Thank you in advance!

Topic by Stevonator    |  last reply

Electrical schematic help/wiring + arduino programming

Hello,first time user here, so i would like to just apologize for the wall of text that's coming up.Im trying to build this little enclosure here and i have a hard time understanding the basics of the electronic schematic thats invovled, when he shows how to build it. Nor do i truly understand what components are in it, hence why i cannot determine the price of this build (based on electronics). So i was wondering if anyone could lable one component by one for me, aswell as how to connect them all together? so that i could calculate the pricing and see how much it would actually cost. Seccond thing is that i wanted to change it up a bit, and use neopixels, or ws2812b led strips instead with a teensy 3.2 and fastled library code, for that fiery effect. Thought that might look really cool. However im concerned with the power draw of these ws2812b led strips. Getting information from adafruit: 60mah per led at maximum brightness, but thats eye blinding, so a 20mah per led is more logical, as someone with neopixels wouldnt be running full white anyways, and more colorful setup, or patterns. Im able to get 144 led/m quite cheap, but then the power draw of just 1m is a whopping 8.64 A. Which is starting to sound pretty dangerous at 5v. But then again, im not buying neopixels to run at full white brightness, i want the patterns. Im wondering if there is any possibilites to make a admin command or a priority list or something to lower the brightness of the strip entirely without messing up the code? i know regular leds have ir remotes to dim the light. I mainly just want the red flame effect, which is only 20mah at max brightness and a peacefull 2.88 A, but i also want white light + i want the safety of knowing i can supply the strip of the power it needs, just incase. The video with the code is underneath: (code in video desc)and i know 144 leds/m is probably overkill, but then again, im getting them dirt cheap, + it would give off a much better fiery effect than a 60 leds/m or even a 30 leds/m thanks in advance for any replies, and sorry for my wall of text. :)

Topic by karminderb  

need help decideing what electrical componant to use

Im trying to do build a progect and it involves using a laser security system to power a video camera problem is i want the video camera to start recording as soon as the laser is broken and to keep recording for like 10 or 20 minutes or so what electronic should i use to acomplish any help would be appreciated?

Question by Dreidel    |  last reply

electric micro kart

I want to build a micro kart with a range of 10 miles at an average speed of about 5mph, with a reverse function. Iv been looking at blogs and Instructables for micro karts and DIY electric longboards hoping to directly copy the basic components of another project however all the projects iv found are for high speed machines that often need a bump/kick start and i need something that will happily run at consistently low speeds without an assisted start. I don't have the electronics knowhow to work out what combination of motor, battery and ESC i need but from what iv read it sounds like i might need an outrunner (?) type motor which is apparently good for low speeds and high torque. Iv been looking at the Turnigy motors on the Hobbyking website as they were recommended by a few blogs, i tried posting this question on their forums a week ago but got zero response. Could you take a look at their motor selection and recommend the appropriate combination of parts? Thanks

Topic by ambientvoid    |  last reply

I have a electrical component and have no Idea what it is or how to use please...?

I recently acquired a large box of electrical items...when I was receiving them I was told what some of the items did. Unfortunately I did not have the common sense to write down the items and description. Could some one please help identify this items purpose and use in a circuit (a circuit diagram would be nice if you could provide). The items are in small white boxes that say, "Army    U.S. Navy" On the next line says, "Type JHS-1N23A" The last says, "Sylvania" Please help.

Question by pagosapig    |  last reply

Learning about electrical dohickies

I'm not proud of this, I don't know very much about electronics, electricity and the components used. However, what I do know is that when there are three poky things on the end the thing-a-mabobber you either have to put it into a thingy with three holes or, if there are only two holes, you have to get a hammer and beat in the third hole. After that my electrical knowledge wanes.So I'm trying to find an avenue to increase my knowledge about the subject but I'm having a hard time at it. I've checked out books from the library but, being that those books are written by engineers, they're coded so that only those who posses the engineers genome can understand them. I stopped by a local community college, explained to an instructor there what I was wanting to learn and after a few minutes he tells me that I'd have to spend the next year or so learning electrical theory before I could even get started doing what I'm interested in doing. Maybe he's right, but I just want to cover all my bases before diving in.I have no urge to become an electrical engineer, but I would like to know things like how to repair an extension cord correctly and safely. I'd like to know how to hook up a small DC motor to an AC power supply, use a bread board to make blinking lights or something then transfer them to something more permanent. I'd like to know how to wire up a light table, know what rating of switch I would need and why. So nothing all that difficult, or should I say nothing I think is all that difficult.I know the standard reply here is "just start playing with stuff" but considering that this is electricity and components can add up money wise, there is a risk of fire, and I have no urge to give myself electroshock therapy, I was wondering if anyone here could at least point me in a direction to start. I've considered getting one of those electrical sets that you get for kids to learn with but I don't know if that's a decent place to start or not.So any feedback would be very much appreciated.Take Care, ChrisP.S. I'm just joking about getting a hammer and beating in a third hole. Instead you get a pair of wire cutters and cut off the poky thing that doesn't fit ;)

Topic by astro347    |  last reply

How can I connect a 120VAC timer to a powered 24VDC switch.

I have a 120VAC power supply operating a timer. That timer needs to provide an interupt signal to a switch operating on 24VDC. What would I need to do to accomplish this? I need a very cheap, temporary solution as this equipment is going to be replaced in the next couple weeks.  I do need a solution quickly though, because the components I am operating are critical to the compliance side of the equipment function. Any help is GREATLY appreciated!! Thanks!

Question by carver919    |  last reply

Using Bluetooth to control simple components

I am undertaking a minor project with a friend and we need to build a bluetooth transmitter to be controlled by a mobile phone. All we need it to do is to give an electric signal on demand. Any expertise, components and suggestions people can share with us, I would be very grateful for. Merry Christmas! x

Topic by Martain    |  last reply

Where can I find a magnetic power connector? Answered

I'm working on a project that would greatly benefit from a magnetic power connector similar to the MagSafe variety that come standard with new MacBook laptops. All I want is the connector itself, the male and female side. It doesn't have to be MagSafe brand and it would be better if the magnet wasn't very strong. It should support about 30cm of power cord. This is for 24V DC. I've looked on Ebay and Mouser with no luck. Does anyone know where to get these connectors? I'd rather not buy and destroy the Apple branded components that include the connector, not least for the reason that it would be unnecessarily expensive.

Question by laserjocky    |  last reply

what is this electronical component i have found?

I've found a blue thing in an old electric piano it has two legs written on it 10nJ+   -100V

Question by top.boy    |  last reply

what websites have cheap components for coilguns?

I was just hopeing someone could help me find some websites that sell cheap electrical components like high voltage capacitors.

Question by bobmcbob_345    |  last reply

custom electric (110v) timer

I am looking for a timer, much like the kind often used for lamps when you are out of town... set up a timing loop and it cycles power off/on to a device plugged into it. My problem is that all such devices I can find operate on intervals near 1 hour (the quickest I have found has a minimum 15 minute off/on cycle). I need to switch off a device for a few seconds, once each hour or so. My current rough estimate is to go ~59 minutes 40 seconds on, then ~20 seconds off. I may need to tweak that though so something programmable would be great. I am not an electrical pro, but neither am I a stranger to circuits or house wiring. I know all the safety precautions and can solder/assemble components... I would just not be able to come up with my own schematics to create something like this. If anyone is aware of an existing device, I could purchase it... but I would sortof like to DIY it anyway.

Topic by karossii    |  last reply

how do i make a simple electric energy savingcomponent?

Well I'm in the starting process of a project on a Technical school in Denmark. we've been given the task to create a simple electric component which will lower your consumption of energy. it is to be inserted in a house, car or other often used placed. (sorry for my poor English, you may comment on that to ;D) Thanks Bjarke

Question by bjarkethomsen    |  last reply

how to power multiple devices on one 12v dc power supply? Answered

A)   So i'm upgrading my soldering fume extractor as the OLD model looks ancient.. the old model ran x5 12v dc fans with the following current rating ( 0.12A,  0.25A,   0.41A,  0.40A,   0.40A ) and 3 standard 5 mm led's.  POWERED BY 12v = 500mA DC power supply B)  the NEW model will have x4 dc fans @ 0.41a          x1 12v 360 degree W5W led  0.41A           x6 5mm leds     x1 arduino Nano. My questions are: 1) How did i power the OLD model (A) with that power supply. from my understanding if doesn't supply enough current.  2) Can i power all the components in the NEW model(A) with a 12v 1A supply  and if not how can i power all these components from 1 plug? thanks for your help

Question by icey.hood    |  last reply

Electric Vehicle (electronics/components) question. What would be the best tool for the job? Answered

I am starting an electric vehicle project. For this project I have two motors, each powering to 2 fixed wheels. I will have a computer (Arduino-ish) supply power to these motors based on the graph of cos 2x (1 being 100% power ratio). The the steering wheel is the input of the degrees/radians. (Now comes my question) I will need some way for the computer to know what degree the steering wheel is currently at, (0 degrees= strait,  -90 degrees=90 degrees left, 90 degrees of course being 90 degrees right.) what would be the most efficient way of doing this?

Question by NoNameCola    |  last reply

Joule thief is not working?

Learned about the Joule Thief from Make's Magazine and used their schematic. I'm pretty new to electronics so I don't know much about components. Applying 3 V, the LED lights up, but applying 1.5 V, no light. Green wire is 22 ga, blue wire is 26 ga. Using a 2N3904 Transistor and a Ferrite Toroid. I think I "barely" got the LED to dimly light up, but it would not stay on. Am I doing something wrong? Picture available in second comment.

Question by gera229    |  last reply

Can someone please help with a simple lighting circuit.?

I connected 7 NiMh batteries in series. I connected another set of 7 NiMh in series. Then, I connected the 2 sets together in parallel. A voltage check of the battery pack reads 9.4V. I want to build a miner style light out of it. I'd like to put the battery pack on a belt, and have a control box, also on the belt, with an on/off switch, a dimmer, and a battery recharging connection. I know how to solder and have a basic understanding of electricity. What type dimmer, bulb, etc. would be best? I'd like the light to be as bright as possible, without continually blowing bulbs. Something like this is what I had in mind, but I'm not sure what size/type components to use. Also, am I missing anything?

Question by coon_skinner    |  last reply

looking for a component to control my 36v500w motor speed and direction from an arduino

Hello! I am currently trying to build my won electric scooter. i bought this motor;=item20e5b8bbc3&vxp;=mtr and i have a 38v 10A battery which i plan on turning into 20A further more i plan on using a resistor to change the out volt to 36v. i am now looking for a controller that i can connect to an arduino so the arduino can control the speed and direction of the motor. any suggestions?

Question by bfeher1    |  last reply

Which is the best online store selling electrical components i.e LEDs,resistors ect(uk only)?

I would like to make some of the electical projects especially LED stuff, but not sure where is best to order my parts? i dont know exactley what parts yet,just need ageneral allround electrical online supplier. thanks

Question    |  last reply

What components do I need to produce my 3 rechargeable Power-Packs using what ive collected so far ? Please can anyone help ?

Hello & Good day to you all, I'm making my own powerpacks for: a miniature wireless CCTV camera & receiver (Link Below for specs) , and a rechargeable powerpack to charge my laptop (that dies in 15minutes!) Wireless Pinhole Spy Camera & receiver After spending stupid money on sh*t 9 volt batteries (600mAh = £11 EACH) - ive had enough of the crap and absolutely absurdly LOW capacity 9 volt batteries out there (when TODAY's 'D' cell is capable of 11,000mAh !!!) and extremely high cost - i am making a battery-pack to power my receiver and another power-pack for the wireless camera using Ni-MH rechargeable batteries in the following packs: Powerpack 1 (for camera) 6 x 18650 cells @ 3.6v each, 5000mAh {Total Power=21.6v} Output Power Needed:  8v, 200mA Powerpack 2 (for camera receiver) 24 x D Size cells @ 1.2v each 11000mAh ( Total Power= 28.8v)  Output Power Needed: 12v, 500mA  Powerpack 3 (for Laptop) 40 x D cells @ 1.2v each, 11000mAh {Total Power=48v} Output Power Needed: 16v, 4A  I should add that my existing 9-volt (2 new & 1 old) rechargeable batteries are a little-more-than USELESS (Rated @ 175mAh...{USELESS}) as the receiver of my wireless camera drinks the power (juice, lol) at an extremely FAST-Rate... 15 minutes of use and its DEAD. 10 mins of use from the old 9 volt battery. And thats all from a 9 hour charge... How pitiful...Despicable & Disgusting... Now i got the idea to use a semiconductor from an instructable to make a simple solder-fume-extractor... (Link Below!) and also i know that resistors can reduce the voltage and amperage output of a circuit.......... Solder Fume Extractor I have calculated, researched, 'Googled', calculated again, more googling and after 6 months of trawling through the internet to find parts of designs i could hack together to achieve my goals including getting answers from "SO-CALLED-EXPERTS 'In the trade'" and from Circuitry & Electronics Forums (whom shall not be named...) yet they always say, yeah, here's my email address, email me your questions and when i do, they all turn around and gimmi some crap like " have your plan all set-out so what do you need me for ?" AS*HOLES! F*C*ING AS*HOLES!!! - If these peeps didnt want to help in the 1st place, then WHY BOTHER to give me their email address so i could ask them directly for help ? Im now going to give up and finally cry-out --- Please HELP (Again and probably for the last time!) ok ok, enough of the hell's-anger-fuelled-rage-at-"EXPERTS" who give me the run-around.....(Bcoz they're AS*HOLES...) Please please please can anyone help me find the components i need to make my very simple circuits for my battery packs ! I know that the use of a/a few? semiconductor/s (3 pin only) can let in a certain voltage and only output a specific voltage & amperage - i think i'll be needing a combination of a semiconductor and a resistor but i've searched continuous for 6 months now and am now irritated-beyond-belief that i still haven't found what im looking for or that no one is willing to help! ffs! Many thanks in advance for some light on this darn-troubling matter.... Please Help !!! Power-Specification For My Gear: Wireless Receiver: DC 12V 500mA Wireless Camera: DC 8V 200mA Sony Vaio Laptop 16v, 4A Also how do i charge my individual power-packs ? At what volts & amps do i charge them ??? Im already severely mobility-impaired and wouldn't want my life getting worse by any of my battery-packs exploding near me!!!!  Ingredients i have collected So Far: - 12 x 18650 5000mAh Batteries (Li-ion) (i want to make a total of two power-packs with these) - Solder Tabs for battery Packs -Small to medium collection of semiconductors + (plus) & - (minus) output voltages (from -24v to +25v) and from 100mA to 1.5mA amperage... - Heatshrink (40mm, 50mm, 70mm) - 24 x D cells @ 11000mAh - 40 x D cells @ 11000mAh I have no resistors but can order anything i need online if i only knew what to order!!! i would also need to include a circuit to prevent deep-discharge & over-charge! This is where i need the main help: I cannot read electrical diagrams at all but try to but it takes a day of deciphering and thats only if i do it right, i have dyslexia and am fighting daily with it when it comes to referring to any diagrams concerning circuits so would it be possible if someone could draw the circuits i need onto an a4 piece of paper and photograph it to be posted here (or draw it in paint, lol) - what i mean is, to draw a basic 3 pin semiconductor (a square with the 3 pins coming out the bottom, lol) and then draw the wires that need to connect to all the 3 pins to then for the wires to go to whatever component they need to go to next, for example ? {the 'solder-fume-extractor's' wiring picture where you can clearly-see where all the wires connect to all the components is the only type of simple diagram i can read by myself} Still wiht me ? i lose myself sometimes! So as i understand it, from what ive been reading so far, as long as the voltage output of the battery pack is correct, say for example for my wireless camera, if ive used a semiconductor to get the voltage of my power-pack down to give an output of 8v rated to 500mAh, as the device (wireless camera) only uses a max of 200mAh, then does this mean that the device will only use what it needs and ignore the rest ? Also it has taken a week of help from many friends of mine to help write this question and to keep it on-track with my main goals for the 3 power-packs listed above! if anyone needs more info, please let me know and i shall endeavor to reply as soon as humanly possible, again many thanks for your help Again, many thanks in advance for all help given and i sincerely apologize the long speech of a few questions, im afraid i get too-specific when asking for help (and often branch-off far-too-much, like now, lol)

Topic by offtherails2010  

Thermo electric? Fridge, can I put a fan to the door to cool my small room??

Thermo electric? Fridge, can I  put a fan to the door to cool my small room?? It has a big Thermoelectric component on a even bigger heat sink on it and it works as a fridge, will it work as a cooler as is or if I take out the cooler component and place say 12 psu fans on top of the cool side? thanks Al

Question by celalboz    |  last reply

I want to etch brass components for my model parts.

I want to use press-n-peel thati use with the PCB's I make, to etch small detailed parts for model making, out of brass. What would be the proper ratio to mix Muratic acid with h2o2 so it will not eat away the mask material. I cover the back of the brass sheet with electrical tape, to protect the other side

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Suggestions on finishing my Walnut Electric Violin? Answered

I'm getting very close to the end of my electric violin with a little woodworking left to do, then finishing. Being new to wood working I have very little knowledge on how to finish woods. Its a black (I believe) walnut body with Ebony components. I plan after a few touchups to sand gradually to a very fine grain but don't know what to do afterwards? Plugged it into an amp the other day and sounded great, and the effects were fun :). Pictures- Thanks in advance!

Question by zigzagchris    |  last reply