Can I use Arudino Uno instead of the Arduino pro mini 328? I am interested in the following Project so please help http://www.engineersgarage.com/contribution/intelligent-letter-box-using-arduino-and-gsm
Topic by RanjitE1 | last reply
Hey everyone does anyone know any good ideas for making a portable ham radio transmitter and receiver that can fit inside an iPhone case (the cardboard case you buy them in)? It would be good if it was a kit, but it would be better if it can be made using a breadboard and other bits and pieces. Anyone have any ideas?
Topic by simonyu | last reply
I am currently building an RC hovercraft, I plan to use a single 12 volt 2.1 amp hr lead acid battery to feed both the lift fan for the skirt and the power motor for the drive. However the fan for the skirt is 12v 0.3 amps. How can I reduce the feed to the required amperage with out affecting the other feed from the same battery that will power the drive
Topic by Seafarer77 | last reply
Is there something that exists that can wirelessly short-circuit electronics? I haven't found anything on Google. I'm pretty sure i read something about a guy making something called an F-Ray that did this, but that was in Tesla's lifetime I think. In short I want to build something that can over-voltage or short circuit electronic devices/machines. I don't care if it ruins them or temporarily disables them.
Topic by Jordo | last reply
Under the right circumstance in a synchrotron for example, electrons accelerated to very high speeds can be made to give off photons. Apparently to preserve the laws of conservation of momentum and conservation of energy. i assume this means the photons in this case have mass to allow the electron to obey these laws so does this mean: 1. Electrons contain the photons 2. Electrons generate the photons 3. Photons are spontaneously generated by some other effect 4. The electrons are dragging photons along with them. Why do i have a feeling I am not going to understand the answer, if I could I probably wouldn't have asked the question!
Question by rickharris | last reply
I want to start a few projects using a Arduino board and know what I'm going to do. The problem is I do not understand some concepts and parts with electronics. I was woundering if anyone could recomend a decent Electronics Book to help me grasp concepts and what specific parts do. Try to keep it in the $20 range because I have a gift card to amazon. Once I document my project I'll do an instructable.
Topic by acer73 | last reply
Please guys I need a small 12 or 24 volts device that can give me a forward movement when it's powered on and backward movement when it is off or vice-versa. Just as pneumatic pistons work, but I need it to be electronic. please help it is very urgent. thanks
Question by victorious4live | last reply
Hey guys, ive been a big fan of the site for a long time but have only just signed up. I just wondered if anyone could recommend to me some good books/guides on basic electronics and circuit building. Iv always been interested in the way electronic devices work and after viewing some cool looking instructables on here decided i want to try and learn about how to make them. It is also fueled by my interest in physics which i want to pursue in university. Any advice would be much appreciated, thanks.
Topic by The Stans Mysterium | last reply
Hey, I've just started getting into electronics, it interests me alot. I have a pretty good understanding of each individual component, but don't have a good one of how they work together, so do any of you know of a good 'circuit cookbook' that has easy circuits with explanations? That would be great. Also, what components should I always have around if I'm just tinkering? I have a bunch of resistors (1 ohm to 1M ohm) and a bunch of capacitors (.22 UF to 2200 UF).
Topic by Jackhole | last reply
One more forum post and then I swear I'll take a break!!! I would like to build a sort of a "secret box," where access would be had through a sort of electronic "key." A few specifications: (1) the box would be permanently out of doors, and (2) the "key" would be simple enough that I could give interested parties the schematics and tell them to make one. I'm thinking a USB connection would be a natural, but I'm not an electronics person, so I'm open to all suggestions. Thanks!!!!!
Topic by Purple Chez | last reply
Basic of this post is where e to buy micro size electronics for micro flying drones which are insect size? I asked arduino and raspberry pi, no answer yet. in this post : https://www.instructables.com/id/3D-Printed-Ornithopter-Micro-UAV-Drone/ there is electromotor which OP claim that was used also by inventor of little flying drone...regarding arduino uno board i am not sure that was really used by inventor, please see pictures and videos on youtube....so if someone knows please post where to buy such micro size electronics. Thank you
Topic by ruma29 | last reply
Hi ppl,I am currently making a variation on this circuit:http://www.edn.com/article/CA257052.htmlhttp://www.edn.com/contents/images/257052f1.pdfI understand how it all works but do not understand the principle of the inductor capacitor used (bottom left), if anyone could give a brief explanation of this (links are good too) and also some formulae i would b e very greatful!!thanks
Topic by drummer ian | last reply
I have a spst relay(operating voltage-12v) using for switching the solenoid valve(24VDC and 0.5Amp) which connected through 24 V battery. relay is again connected to the transistor BJT NPN . So please suggest me that which transistor is most suitable.
Topic by jay_3189 | last reply
So here goes, I am trying to figure out how to make basic sound generating machines. Preferably generating a sound that can be modified with a potentiometer or something of the sort. The principle is simple, these will be for messing around, possibly, if the result is good, using in some random recordings of mine, so most of the machines will have a jack out plug. Anyhow I was wondering, what, in a circuit, actually makes sound, what is the base of all sound generating electronic devices (synth, analog stuff, beepers) what actually creates the wave, the current that is sent to the speakers? Have I just answered my own question by saying current? Is it just the electrical current, and putting random resistors, capacitators, potentiometers and stuff changes the sound that is generated? Any help is more than welcome! and if anything good comes of it, I'll post some sound clips!
Topic by gavox | last reply
Hi, i'm a bit new to electronics. I was wondering if its possible to turn on the flow of current by another electrical signal. Yes, i know about transistors and relays but these switches turn off as soon as the second current is stopped, how to make this change in switch permanent, i'll be precise, i'm working on a laser alarm system, and it works fine, but the thing is that when i block the laser, sure the buzzer goes off, but when the obstruction is moved, the buzzer turns off, how can this be kept on until turned off manually by a switch. i know it must be quite simple but i dont know, please help thanks
Topic by walee | last reply
Okay. I'm going to make an electromagnet to hold the spring in place while it's compressed, and then as the power turns off, the spring will release and shoot the catapult. However, I'm not an engineer-- I'm making this for tech class. How should I design the catapult so that this will work as a triggering mechanism? In what way should I set up the spring and electromagnet relative to each other? Thanks in advance.
Topic by camiheall | last reply
An idea has occurred to me about how PC boards are currently made. The normal process now is a destructive one, where unwanted copper is etched away. What about figuring a way to electroplate the traces onto a substrate? Various toys and model parts are made of plastic, and yet have been electroplated with a cheap form of chrome. Why not apply that to PC boards? I'm thinking that a photographically negative mask could be used in a photo-sensitive process to apply the conductive surface to a heat resistant substrate, and then the copper traces could be electroplated on. Anyone have any thoughts on this, primarily at a hobbyist level? **note - cross posted in burning questions.
Topic by charlie_r | last reply
I do some work with the FIRST Robotics kids and it is amazing to see what they are doing. Big problem though seems to be a general lack of electrical test equipment. They don't really have the money to buy oscilloscopes, function generators, CAN and I2C analyzers. So I got one of the M3 Discovery boards from STmicro and it is really cool. It has four 5MS A/Ds on it plus a whole host of other features(CAN, I2C, Serial etc.). http://www.st.com/web/en/catalog/tools/PF254044 So it got me thinking. Why couldn't we turn one of these chips into an "All-In-One" electrical toolkit and keep it cheap($50-$60, BOM ~$20). It would be fairly easy to turnkey. I threw together some simple specs, what do people think. 1) Will supply general use drivers so a user can use the app or write their own. 2) Oscilloscope a. Two Channel i. 2MHZ of Analog Bandwidth per channel ii. 10MS/s per channel iii. Trigger on rising edge, falling edge, on-command, run-stop actions iv. Datalogging for extended time periods at up to 10hz per channel (data stored directly to console), maybe higher rate will just have to see 3) Serial – 2 Ports a. Multi selectable protocol w/slew control i. RS232, RS422, RS485 4) CANBus – 1 port 5) I2C – 1 port 6) SPI - 1 port 7) 8 Discrete User Selectable 8) Function Generator a. Two Channel i. 1MS/s small signal change ii. 250kS/s full range change iii. 0-3.3VDC buffered output 9) PWM - 4 Channels
Topic by ase4542 | last reply
Hi everyone (sorry for my english , it's not my mother tongue and the english courses in France suck) I'm at the Fine Arts and I'd like to work Arts through Electronic , so I'd like you to tell me what I should look at to learn electronic stuff (I'm a real beginner) , easy project which needs few electronic components. I have access to a lot of tools though (Dremel , Saws , Drill , Electrical Saw , Chainsaws ....)
Question by Anykey | last reply
I need a 20k R2R resistor network (for making another project on the net) and I'm ordering from mouser and the only ones they have are out of stock, so I want to build one. I know how to hook the resistors relative to one another (a quick look at wikipedia solved that), the only thing I'm wondering about it the values... To make a 20k R2R network do I need: 10k and 20k resistors? or 20k and 40k resistors? I think it's 10k and 20k, but I'm not sure
Topic by guyfrom7up | last reply
If anybody could help me out that would be great... I saw plans for this a few years back but lost them. The idea is to use 4 laptop screens in a mock 4-pane window frame. There was a hard drive and power supply behind the frame that would put a picture up so you are looking at a different view everday like the Eiffel Tower, or Golden Gate Bridge, etc. Hang in an empty space on the wall and its like a fake window with a killer view!!! Sound like a potential favorite?
Topic by kbowman | last reply
Here's a problem that I can solve, it's for a portable rechargable usb charger. The original plan used mini relays, but they consumed too much energy, so I need to solve this somehow. There's 1 usb port, I need it so whenever you plug it in a computer it powers the charging circuit, but when it's not plugged in and some other thing, such as an ipod is attached to the same usb port, the boost circuit (i'm using a lithium battery) connects to the usb port, but it doesn't charge the battery in an inefficient cycle. The boost circuit I'm using is the max1709.
Topic by guyfrom7up | last reply
Have just started a new electronics project that i have been thinking about for ages. this is the basic idea, i am going to give someone a christmas "present" at a party which will , when i press a remote button, deliver a small 450 volt shock( very low ampage, i've made shockers before). i am disassembling a remote control car and will fit either a relay connected to the shocker circuit or perhaps the shock circuit itself to where the motor was. assuming all works correctly it should be very funny, i will be working on an instructable of how it was done. thanks for reading, tell me what you think.
Topic by resistanceisfutileiflessthan1ohm | last reply
Well, I wonder what electronics part is that I have, seems to be an integrated circuit progamavel, found her in a radio circuit. It is written: SAMSUNG S603V S1A0426CO2-SO KD8025G And I would like to know how to search on the internet specific parts like this
Question by ualbuquerque | last reply
I'm currently building a small hybrid solar panel car for a school sompetition(runs off of batteries or solar), and I need a bit of wiring help, here's my problem and some other stuff. I have 2 SPDT switches and 1 DPDT switch. I'm using one of the spdt switch for on and off, the other to switch from solar to battery, but i need help for the dpdt. There's 2 sets of solar panels (2 pairs of 3 hooked in series, for simplicity sake, I'm just going to say 2 solar panels), and I want to hook them up to the dpdt switch and the motor and the battery so that: I can turn on/off the motor (easy), switch between solar and battery (easy), and switch between paralell solarpanels or series (what I'm having problems with), any help?
Topic by guyfrom7up | last reply
I got an old DVD player, opened it up, and got: -11, 10vdc 47uf caps -6, 16v 10uf caps -5, 10v 220uf caps -6, 6.3v 470uf caps -2, 10v 1200uf caps -2, 16v 820uf caps -2, 10v 1000uf caps -2, 10v 100uf caps -100v 22uf cap -25v 220uf cap ( why is it brown/gold colored?) -Power regulaters (?) *says:C3852, 96 *says:C3852, 95 *says:C3852, 94 (has a heat sink) *says:STR, G6651, 95, 06 Thats about it. What can I do with these?
Topic by John Smith | last reply
I am not sure of what this is, but I think it's a replacement for 5 turns of 28 swg on a intermediate ferrite core (ift) which is missing from the kit. I have this kit for a fm transmitter circuit and I found this in that kit's components.
Question by akki5230 | last reply
So I was wondering if there was anyway I could make or buy an electronic air valve. What I need is something simmilar to a sprinkler valve only smaller and with smaller holes on each side so I could attach a relatively small air hose to it (~1/4" outer diameter). I plan on using this to replace the ball valve on my homemade nerf gun. Any help is appreciated :)
Question by Electroinnovation | last reply
I have solved the problem by making two changes.Firstly, a 22k resistor was put from I/O 2 to ground.Secondly, I had to modify the program to be the following, and accept any value as an input as long as it was not 0. The new program is shown below:main:low 1 'discharge led on Pin 1input 2 'make pin 2 an inputreadadc 2, b1 'read pin 2 using ADCif b1 > 0 then flash goto main 'loop back roundflash:'led sequencehigh 1pause 100low 1goto mainI've been having a bit of an odd problem...I'm trying to use a PICAXE 08M with a touch input, so a user touches a wire or bridges 2 wires and the uC responds based on the program, at the moment, turns an LED on.Now, Initially, I've tried a few things, until sort of by accident I noticed that using the program I was, the LED turned on by touching the input pin of the PICAXE, with nothing attached to it except one short piece of wire. I know the human body has certain capacitive qualities, but I wouldn't have thought it would be enough for this. The LED started turning on when I got close to the breadboard it was on, never mind the wire.I tried moving the board, while I had my finger on the wire, and found that when I got a certain distance from my laptop (About 1 ft or so) the LED would go out, and not come on again. Strangely, it does the same when my laptop is turned off!So what I was wondering is, what could my laptop be doing that enables the PICAXE to get an input from seemingly nothing? Could it be some sort of EM field from it? Incidentally, the same thing happens close to my TV.The code i'm using is below.main:low 1 'discharge led on Pin 1input 2 'make pin 2 an inputreadadc 2, b1 'read pin 2 using ADCif b1 < 40 then flash goto main 'loop back roundflash:'led sequencehigh 1pause 100low 1goto main
Topic by whatsisface | last reply
I was hoping someone here would know of a place i could buy electronic components at wholsesale prices. I'll buy bulk. The reason i say this is a friend is setting up an electronics store, but at the moment it's looking like he'll have to buy-in at retail, which'll leave his sales prices very high. Please help me out. Tom
Topic by lifelong-newbie | last reply
Hi! I am a 14 years old guy who've just stepped into the world of electronics. I need to buy a good learning kit in which I can make several projects and at the same time can learn. Are there any of those? Or can you list the items needed to start learning electronics? Jack
Question by jackraj | last reply