### Raspberry Pi Zero W

I received a Raspberry Pi Zero W kit (from Adafruit) over the holidays, but it didn't come with any doco. And I haven't found much by Googling. Does anyone know of information that could help me get started? I haven't worked with any Raspberry Pi product.

Topic by arshag

### little help here!!!

Ok this happened when i was playing metroid zero mission using VBA i used doublehelix but the 1st time i used it it didnt glitch but now it is permanent plz help if you can

Topic by GASSYPOOTS

### anybody experiment with zero point energy?

I have alwats thought there was usable energy in magnets but have been assured that there isn't. Still can't accept it.

Question by boogiemann   |  last reply

### ESC zero throttle power consumption? Answered

I have heard that an electronic speed controller (esc) uses some power continuously even at zero throttle. What I was told was about 0.5 amps, but it seems like it would be different based on size, voltage, etc... My UAV has two 20 amp ecs's being powered by two 4.4 Ah 11.1 volt batteries and it will need to land and sit with the power on for 3 hours after flying 2 miles and then fly back. At 0.5 amps the 3 hour sit will waste 3 Ah. I will probably need to set it up so the esc's are unpowered at zero throttle but everything else will remain powered. Does anyone know a way to calculate about how much current the esc will burn at zero throttle if you know what battery, esc, and motor you have? Or do I need to measure it directly to know?

Question by Jaycub   |  last reply

### Infinity divided by 0?

Does infinity divided by zero theoretically equal any number other than 0 or infinity? I heard something about ohm's law applied to a circuit with an ideal voltage source (which is only theoretically possible) and having the terminals shorted out and at 0 ohms, resulting in the current going up to infinity?

Question by .Unknown.   |  last reply

### tesla ?

Hey guys is these two power sources plasuble http://www.teslasecret.com/ http://www.greenearth4energy.com/zero_point_energy.html for me to bulid

Question by tinker234   |  last reply

### What happens to the WD PiDrive Node Zero?

Hi there!This is my first time using this community function on instructable and I want to ask if anyone knows what happens to the WD PiDrive Node Zero (which is a Raspberry Pi zero add-on shown in the image if you don't know what it was)As what I have found on the internet, all shops that used to sold this have no more in stocks and I didn't find much reviews on this product either. There are quite a lot of reviews which showcase only the drive but not the drive with the adapter circuit board and the plastic enclosure.The reason why I am interested in this product is that I am currently working on a complete standalone and tiny NAS system that use minimal hardware or software powered by the 3rd party except the Raspberry Pi and Linux. I just come across this product online and feel this will be quite useful if I can get one. Anyone knows where can I get this product or what happens to this product which makes it no longer manufactured / so hard to find? Thanks in advance!

Question by tobychui

### Is there some way for me to connect the type of LCD screen with a ribbon-type DSI connection to raspberry pi zero?

I have an LCD screen that I am planning to use for a raspberry pi zero project, but it is a DSI connection, instead of a micro hdmi, is there some way for me to connect this anyway? Any help would be greatly appreciated. This screen is one I took from a broken HP 8600, it is an  "Hp Officejet Pro 8600 N911a Display Control Dash Panel Cm749-60021 Touch Screen"  ***UPDATE*** after a long time of twidling with the tiny terminals, I finally figured out witch ones would turn the screen on (and very brightly at that). Any advice on how to try and figure out how to get video input to it now?

Question by ToggleSwitch   |  last reply

### Can I power a raspberry zero + arduino with a powerbank?

Hello everyone, I want to make some kind of driving computer, but I don't know how to fix the power. I have a 16000mah powerbank that has a 1A and a 2A power output with 5v. And I want to power the following: Raspberry Pi zero Internet dongle Arduino Arduino Motor Shield 4 motors(DC 3-6v each) 2 servos 1 webcam (optional) I really hope someone can tell me if this is possible. The reason I don't want to use normal battery's is because I want a solution that is easy to recharge.

Topic by Thijsd4   |  last reply

### Has anyone used Rustguy or zero-rust converter products?

I am looking for a fast and easy product for my volunteers to use on a steam engine that is being restored and wondered if these products are any good and worth the \$\$\$ they charge? These products seem to be an improvement over the gloping on of the Naval Jelly and hundreds of man hours of wire brushing and sanding, priming and painting... Just wanted to know from an outside source if these are good and effective so I can recommend them to the Board of Directors and not end up looking like a jerk... They already think I don't know much because I'm younger and a girl! For example, I am still trying to convince them that the engines on static display would look nicer for longer if they used an epoxy based paint instead of exterior house paint! I appreciate any thoughts you have on the two products listed, if you know anything about them! Thanks!

Question by ALMOSTATILLSON   |  last reply

### why internal resistance of voltage source is considered as zero and internal resistance of current source is infinity?

Question by SaikatG   |  last reply

### Distribution of Comments and Ratings Across Instructables

While Zachninme was here last week, he pulled some interesting data on Instructables. Check out the distribution of comments and ratings across Instructables in the graphs. Instructables with zero comments or zero ratings are included, which skews the data, but it's still interesting.total positive ratings / total number of Instructables = 10.4total number of comments / total number of Instructables = 19.1The raw data is attached, if you'd like to take a look.

Topic by ewilhelm   |  last reply

### i want to power a 3 raspbery pi zero from ATX power supply can i ?

Hello guys, i hope everyone doing good, I have this question, i want to power up a raspberry pi zero from ATX power supply (standerd power supply for computer) i have search online for answer but, i don't have clear vision, someone told me to power the raspberry from the purple wire (5V 2A) but i want to power more than one pi, so should i go with red wire ? red wire (5v 30amps), will the 30 amps kill my raspberry ? or the pi will just take 1 or 2 amps from the 30amps ? what should i do ? and sorry for my poor english, god bless you all.

Question by MohdT15   |  last reply

### One shot delay timer switch without a microcontroller?

How do you output a single short pulse in an electronic  circuit after a specific period of time has elapsed after the circuit is powered on such that when the circuit is powered on, the output remains zero for x seconds then it becomes +5 V just once for y seconds then again back to zero for the remaining time much like monostable mode of 555 timer except that the pulse here is output in the middle i.e. 0v-5v-0v. Can this be done without a microcontroller?

Topic by raftor   |  last reply

### slow voltage current builder: how to increase voltage,current in ramp manner upto the desired value?

Let us assume a system requires 230V ac, 6 amp. When we switch it on, the voltage and current instantly shoots up from zero to 230V,6amp. I want the system to receive the voltage,current slowly ,i.e, when it is  switched on, the voltage,current should increase from zero in a ramp manner ,and when it reaches 230V,6amp, it should remain there till  the system is switched off.

Question by iamnimisha   |  last reply

### DC Motor- dead or alive?

I've got a DC motor from a treadmill that when I spin it generates a small voltage then drops off to zero even as the motor continues to spin. Is it shot? Can it be repaired, if so, at what cost.?

Question by haroun   |  last reply

### Can someone look over my Schematic?

Hello All! I have recently started using Eagle, so please forgive the messy schematic as well as the lack of labeling-I am still trying to learn the ins and outs of the software. So I recently received my raspberry pi zeros after months and months of waiting and have been incredibly satisfied with the size and compatibility. However, the biggest issue is the lack of USB ports, which of course were eliminated on purpose to decrease the weight, size, power consumption, ect. I thought it might be useful to design and fabricate a usb hub shield that follows the form factor of the pi zero. I was searching for information and came across this IC that can serve as a 3-port hub, the TUSB2036. However, it only operates at the USB 1.0 spec. Upon further research, I found that the newer model of this IC is the TUSB2046. I made an attempt to design a schematic off known references as well as the data sheets to form a small hub for the pi zero. Can someone with electrical engineering or circuit design experience please let me know if this would work? I used this schematic as a reference and [attempted] to modify it to accommodate the four port USB 2.0 TUSB2046. One important note, the pin labeling on the schematic follows that of the TUSB2036, as I could not find a way to modify it...Please reference the pinouts in the data sheet for the correct labeling on the TUSB2046. Thank you for all the help!

Question by JoeW79   |  last reply

### What capacitance is a TO412 capacitor?

It came from a disposable camera and has no informational markings. The camera's a few years old so I can't get any manufacture's info. The "o" could be a zero for all I know, and it also says "PET" below that.

Question by Betelgeus3   |  last reply

### How do buttons enter binary?

I was just wondering how a push of one button can enter a series of binary signals to, say, a computer. I get how the digits one and zero would work (howstuffworks.com) but what about the digit 2, 3, abc, etc?

### Q: why does a 220v (down-step) regulator output 300v?

Hi, bought this 220v regulator (see photo). strangely enough the volt-meter shows almost 300v on the output (at zero load). otherwise it works fine. any ideas? gracias

Question by la xerra   |  last reply

### What is the easiest/simplest way to run this "220V 30rpm gear motor box"?

Hello, so my electrotechnical (is that a word?) knowledge is about zero point zero, but ALL I want to do is make this motor do its work and rotate his fine ass. That's the only thing, nothing more, nothing less. What is the easiest way to do that for a clueless hopeless piece of scrap like me? Note: it's important that the motor goes 30 rpm. I added pics of the motor for clearification.  PS. I saw this awesome motor pack thing with clear instructions which would have been ideal for me, but the site doesn't send its products to the Netherlands :( link: http://www.monsterguts.com/store/product.php?productid=17760&cat;=3&page;=1

Question by Dyonv   |  last reply

### What makes superconductors so special?

I've heard about superconductors all the time. I know they have almost zero resistance, but I was wondering what else makes them special. Please tell me any special properties superconductors have, and what causes those properties. Thank you.

Question by Super_Nerd   |  last reply

### Instructable does not show you in the technology category?

Recently I posted a few instructables and I noticed that it did not show up in the technology category, so I posted a few more to check again and then noticed that none of my instructables show up on the technology category so I'm suck with zero views.

Question by ThisIsSteve   |  last reply

### 3D Printed Solar Electric Vehicle

Topic by MTeodor   |  last reply

### . My question is :-Can you get free software to run a 3axis controller.for stepper motors Thanks, myfordmike Answered

Also I was going to use 10mm rolled threaded stud (1.5mmpitch) and make some zero backlash nuts( 2 nuts and a spring)  Does free software run on an ibm t43 laptop?

Question by myfordmike   |  last reply

### I need arduino code help.

Question by inaydenov1   |  last reply

### Does this switch exist? Answered

It may just be my google-fu failing me, but I can't find switch I am sure must exist: A sliding switch with reversing (DC) polarity. At one end of the slider, power is full "forward".  Slide the controller, and power decreases.  Reach the centre, and power is zero/off.  Slide past the centre, and power increases again, but with reversed polarity, ie in reverse.

Question by Kiteman   |  last reply

### I want to build a photovore with a rechargeable battery, but I have zero experience and I have no idea how to wire it.

Example photovore: http://www.solarbotics.com/products/k_pp/ I want to include both an on on/off switch and a battery (not included in any photovore schematics I've found), allowing the robot to run off of both solar and battery power so it doesn't die in shadows (and maybe make it take steps a bit faster in the sunlight?), and have the solar cell recharge the battery when switched off.

Question by the1joebob   |  last reply

### how to check the current requirements of 6 wire stepper motors?

I am building a cnc mill have 3 6 wire some stepper motors i bought from ebay. In the write up on the stepper motor controlers it says to adjust the current for the motors.  but it also says you need to determine the current requirements. Not sur haw to do this. A goggle of the part number gave me zero.

Question by colincolin30   |  last reply

### Please let me know the basic electronic book to learn about electronics. I am very interested in learning.

Now a days after looking at the electronics items in the market, I am very interested in learning the electronics but I am zero in electronics.  Since my interest lies in that I am confident that I will learn as soon as possible. Hence suggest me a very good hand book for reading & experimenting.

Question by kabirahmed   |  last reply

### How should I do to solve the problem of GPS data not received? Answered

I installed GPS module, MicroSD card, OLED, and Arduino Uno board. After upload the code to the board, the result just show zero value. Does it has a problem with my GPS module? How to fix this issue? Thank you in advance for your help. Your help is greatly appreciated

Question by VankeyH   |  last reply

### Aside from sleep mode, can we completely turn off the power of Arduino through software? Answered

I would like to configure my arduino to have zero current draw when circuit is doing nothing for certain period, like turning off completely. Sleep mode can save power and extend battery life but is there any other way of doing it?

Question by pelegren   |  last reply

### Reading the max voltage of a low duty cycle PWM?

How do I measure the maximum voltage reached by a very low duty cycle PWM signal without having to alter the signal. The multimeter shows no reading or gives a very brief wrong reading and falls back to zero. I don't have an oscilloscope. Are there any other alternative set-ups to measure just the voltage in this case. Please suggest.

Question by raftor   |  last reply

### 0. What is Current ? 1. What is Voltage? 2.What is Frequency?

My Dout is : 0. What is Current ? 1. What is Voltage? 2.What is Frequency? I know Definition. But i need practical example for this thing OK. So what is my dout is 1. When voltage increased current is also increased !      But in some case When voltage increased current decreased OR voltage decreased current increased. How it is possible Current is depend on voltage so When Voltage is zero then current is also zero only know For Example: When 100 Watt bulb receive high voltage then high electron will flow through tungsten of bulb then bulb will give high brightness ok Then same 100 Watt bulb receive low voltage then low amount of electron only flow through the bulb then bulb give low brightness This is the Rule or Nature So Current is depend on voltage only. Then how voltage decreased when current increased. This is my basic dout not only this and many dout about frequency also And Thank U for Replying ME. Thank U

Question by Xzyamaha   |  last reply

### How to write a program to count switch presses for an arduino uno?

Write a program to count switch presses (one complete closing and opening of a switch is one count), and display the count in binary on 4 LEDs. When the count exceeds 1510 (note that a subscript 10 means that the number is decimal, so 1510 is 15 in decimal notation) the displayed count must roll over (all LEDs must go out and the count should begin again at zero).

Question by fgh67   |  last reply

### Installing Cracked Apps On iPod 1st Gen With iTunes (No Wifi) Help Please?

Ok so my iPod touch is the one with no wifi. It is grayed out. No wifi, zero connection, NONE! So, recently my friend put a bunch of cracked apps for me on to my ipod through itunes. What I want to know is HOW do you put cracked apps on iTunes then transfer to your iPod? Thanks

Topic by wyns

### Cycling Power Meter Details? Answered

Hello, I was wondering if someone could tell me what the specific electronic components of a typical cycling power meter are and how they work together?  The picture is of one by Power Tap that is located in the rear wheel hub.  I'd like to try to build something similar.  All I know is that it uses strain gauges.  I have zero electronics experience but I'm hoping to learn by working the problem backwards. Thanks in advance.

Question by Starbuckaneer   |  last reply

### how to write a program to control switch and LED

This program is based on How to Program Switch and LED Connected with PIC16F877A. http://www.kynix.com/BlogImage/9.4.7.png    The following code demonstrate, how to write a program that scan the switch status and turn on and off LED. The switch is connected at PORTE bit-0 and LED connected on PORTB bit-0. When switch is read as high state, the LED is turn-on and when switch state is low, LED is turn-off. The switch debouncing rate is 5msec. The code is written in “mikroC PRO for PIC v.5.6.1” IDE and simulation is done with Proteus 8.0 SP0.  PIC16F877A-I/L Datasheet Code in mikroC [code] // switch connected on porte #define SW_AT_PORT PORTE // debounce rate 5msec #define DBOUNCE_RATE 5 // direction signal sbit LED_dir at TRISB.B0; sbit SW_dir at TRISE.B0; // bit labels portb sbit LED at PORTB.B0; sbit SW at PORTE.B0; // old state save flag bit oldstate_one_to_zero; bit oldstate_zero_to_one; void main(void) { // set porta and porte as digital ADCON1 = 0x06; // set direction as output LED_dir = 0; // set direction as input SW_dir = 1; // init LED LED = 0; // init old state flag oldstate_one_to_zero = 0; oldstate_zero_to_one = 0; while(1) { // Detect logical one if(Button(&SW;_AT_PORT, 0, DBOUNCE_RATE, 1)) { // Update flag oldstate_one_to_zero = 1; } // Detect one-to-zero transition if (oldstate_one_to_zero && Button(&SW;_AT_PORT, 0, DBOUNCE_RATE, 0)) { // Update flag oldstate_one_to_zero = 0; // LED ON LED = SW; } // Detect logical zero if(Button(&SW;_AT_PORT, 0, DBOUNCE_RATE, 0)) { // Update flag oldstate_zero_to_one = 1; } // Detect zero-to-one transition if (oldstate_zero_to_one && Button(&SW;_AT_PORT, 0, DBOUNCE_RATE, 1)) { // Update flag oldstate_zero_to_one = 0; // LED OFF LED = SW; } }} [/code]

Topic by narne   |  last reply

### Can Non-Hybrid Cars Get 100+ MPG Today?

Topic by RT-101   |  last reply

### Burning questions: round 4...where are the entries?

I'm very confused. I was going to take a look at all the BQ entries and now they are all gone. All of us who entered our Instructables into the contest have been removed and it shows having zero entries. I apologize if I missed something here, I'm just curious. Also, some of the topics have been removed now? If anybody could clear some of this up, it would be great. :) Thanks, lovelies.

Topic by asyrith   |  last reply

### why wont my computer make noise? Answered

My computer(windows 7 laptop) is 3 or 4 years old and recently YouTube did not work we fixed that but now there is zero sound coming out of it speakers headphones you name it and windows media player says something like this:  Windows Media Player cannot play the file because there is a problem with your sound device. There might not be a sound device installed on your computer, it might be in use by another program, or it might not be functioning properly. Any help appreciated!

Question by FarmerKJS   |  last reply

### A Physics problem I can't explain properly Answered

If a stick with dm/dl =const is hanging on three nonstretchable pieces of string (l1=l2=l3 and l is the distance between them) you can't find the tensions, because the problem is unsolvable if all the strings don't stretch. It is kind of obvious, because if a string happens to be 0,00000000001 mm longer than the others the tension will be zero. But how to prove this normally?  Sorry, I almost never use English for Physics conversation, so I don't know any proper words...

Question by gruffalo child   |  last reply

### IBM model M has 5 keys that do not work. How can I clean those contacts in the membranes?

The keyboard is in excellent shape otherwise.  Can I puncture the bottom metal shell in the locations in trouble and then inject contact cleaner?  Are there some other vent holes that might be used?  Could it be an electonic problem or circuit board plating in those areas?  The five keys affected are : g,  h,    apostophe ,   up arow,  and the number pad zero. Thanks

Question by rogets   |  last reply

### How do I tell if my multimeter is dead?

I was trying to measure current, then voltage and - basically I had no idea what I was doing and soon everything returned zero. Opened it up, dont see the wire in the fuse anymore. It was rated 250ma 250v 5Ø 20mm. The shop I went to did not have it so I settled for a generic looking fuse rated at 250ma. The multimeter still shows 0 for all the batteries I've tried. Is it time to get a new meter or find a proper fuse?

Question by pantss   |  last reply

### Let us assemble power distribution switches at home together.

Topic by maryzhu   |  last reply

### Can someone help me with a simple audio amplifier?

I need to build a simple audio amplifier for an mp3 device for my A levels, but i dont know which amplifier to use, i would like the amplifier to have a variable gain of zero to the maximum and i also have 2 0.5 watt 8 ohm speakers. I was going to use the simple amp from here, but i am not sure if i can get the full 1 watt from the speakers using that amplifier. Any help will be appreciated.

Question by COOL_Q   |  last reply

### LDR or optical reflective sensor?

I am planing to make a line following robot without micro controllers. So I am using a light sensor connected to an AND GATE (the other input being the current to the motor). So since I am using" an and "gate I want the input current to be an absolute zero or some value ,ie the current should not be varrying with the light intensity. Besides I think I might drop the "and gate" thing and use an OPAMP instead as it would give me a varrying output current which is all I need

Question by chrissunny94   |  last reply

Lets start quickly without taking much of your time.... 1. Keep a simple +ve and non-zero number in mind, example 3, 45, 79 or anything 2. Add 2 to that number, Feel free to use a pen, paper and computer calculator 3. multiply by two 4. add 10 5. add 20 6. devide by two 7. substract 15 8. substract the original number you had in step 1 9. add 6 10. multiply by 5 11. add 59 12. NOW THE RESULT OF all your calculation is 99, is that right?

Topic by avinash   |  last reply

### how do i make a custom spray in counter-strike and half-life?

I would like to add some custom sprays but i don't know how, i assume any method will work for similar games.

Question by d2j5   |  last reply