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If you want to use this voltage indicator circuit to know the remaining power then yes you need two resistors with the same value as voltage divider, because A0 pin can only handle 5V while your battery is 6V and could be more when fully charged.If you don't need the battery indicator then your 6V battery can goes directly into VIN pin which can handle up to 12V.How will you bring down the voltage to get more current? Dropping the voltage to 3V will shut down the Arduino doesn't it?
Wow.. that's cool. Why didn't you take some pictures and start a new instructables? It is Fun ^^ and sharing knowledge to the whole world ^^We teach and learn at the same time, as I learned about wiring safety in this project :)
It depends on the wood you are going to use. For dining table size, heavy wood will be hard to flip because you need to flip table tops at both size before putting it down on the legs. So, again, size and weight of the wood do matters with this kind of design :)
That's great. You're welcome ^^
First, define the maximum voltage of your battery. Remember that LiPo batteries may be higher than their ratings when fully charged. For example, I have a maximum of 24V to be tested. I use 6 resistors that have same values. Actually 5 are enough in my case, but I just want to explain better with 6 in the picture I attach. Battery that is higher than the voltage Arduino can handle is not recommended because it will be bad if it is not carefully wired.You should take between the first and the second resistors CLOSEST TO GROUND (negative of battery) those are R5 and R6 in the picture and wire it to Arduino analog pin A0.Concentrate. If you plug somewhere at where I mark with red A to E, then BOOM!! you will lost your Arduino pin, or worst, the whole Arduino :(Because the voltages there ar...see more »First, define the maximum voltage of your battery. Remember that LiPo batteries may be higher than their ratings when fully charged. For example, I have a maximum of 24V to be tested. I use 6 resistors that have same values. Actually 5 are enough in my case, but I just want to explain better with 6 in the picture I attach. Battery that is higher than the voltage Arduino can handle is not recommended because it will be bad if it is not carefully wired.You should take between the first and the second resistors CLOSEST TO GROUND (negative of battery) those are R5 and R6 in the picture and wire it to Arduino analog pin A0.Concentrate. If you plug somewhere at where I mark with red A to E, then BOOM!! you will lost your Arduino pin, or worst, the whole Arduino :(Because the voltages there are higher than that 5V Arduino pin can handle.Don't forget to change the sketch with *6 to convert into true voltage :float voltage = sensorValue * (5.00 / 1023.00) * 2; //convert the value to a true voltage.to float voltage = sensorValue * (5.00 / 1023.00) * 6; //convert the value to a true voltage.With 6 resistors, you can measure battery up to 30V. Just remember to concentrate on wiring the A0 pin, that is near the Ground. ^^
Yeah.. They are cool aren't they? :DCombine with "mysterious prizes", you just don't know what you win until they arrive at your door. One thing you know that it must be cool and nothing like it on this planet, unless people build some based on the instructables, it is still limited edition :D
What about COOL things that were built by Instructables' crews/team. Those will be awesome unique prizes given on special day such as Instructables' birthday ^^Sometimes people just want a unique prize you can't find in the market anywhere in the world and not an expensive one :D
Nice one. Simple yet stylish.
Ring Toss Game (From a Box)View Instructable »
Sorry for my late reply. From what you described, you must be using Arduino Mini or Pro 3.3V? If you are using Arduino Uno, then you must be connecting your USB cable because 3.7V battery is not enough to power an Arduino Uno. If you power your Arduino Uno with USB cable and you only need to test the battery voltage then DO NOT connect battery to Arduino Vin. If it doesn't workout for you, then maybe you can share your wiring by uploading the picture of it here for me to investigate ;)
This is CooooooL! ^^Love it!
You are welcome ^^
Fidget Switch : the Power I...View Instructable »
Do you change any of the circuit above? If you are using battery lower than 5V then you don't need the voltage divider circuit (two identical resistors). Simply plug your battery (-) to arduino GND and battery (+) to Arduino A0, then you need to change the code a little. Find a line commented with "//convert the value to a true voltage" and remove the " * 2".
Sorry for being late to reply. For 12V battery you can use voltage divider with 3 identical value resistors. So your battery voltage will be divided by 3 and as long as it is not over 15V at peak, it is safe for the arduino analog pin to read.Let's say the voltage divider circuit is now :BatteryPossitive -- R1 -- R2 -- R3 -- BatteryNegative/GNDRun a jumper wire from between R2 -- R3 to Arduino A0.Then you need to change the code from "*2" to "*3" where we calculate back to RealVoltage to be shown on LCD.Hope this help ^^
Arduino pin will only read the voltage and drawing a very little current. The rating 2250mah simply tell us how long your battery will last on certain circuit/power consumption.
Well, Arduino analog pin reads from 0 to 5V. It has 10-bit analog to digital converter. This means that it will map input voltages between 0 and 5 volts into integer values between 0 and 1023. What we get from analogRead() function is an integer from 0 to 1023. So let's say we read an "800" (eight hundred). We need a voltage from that reading so it is : 800/1023 * 5 V = 3.91 V.If you have previously reduced your battery voltage with a voltage divider into half, then you need to multiply by 2 to get back the real voltage.
Alohomora! That's just a bunch of electronics. But making the video was my craziest moment truly :D
I think she's talking about the large group called Instructables. And we called it The Big Family ^^Welcome to this Big Family @jbonar2 ^^
Thank you ^^Actually I read a "welcome back" for I have been missing for a while drowning into my real world :DD
Arduino Auto KnockView Instructable »
Thank you, Darek ^^
Thank you. Yes you can connect battery ground to Arduino ground. Then battery possitive pin to Arduino A0. Then simply change this line in the sketch:float voltage = sensorValue * (5.00 / 1023.00) * 2; //convert the value to a true voltage.to this one:float voltage = sensorValue * (5.00 / 1023.00); //convert the value to a true voltage.That is removing "*2" because your battery's voltage is below 5V and can be handled by Arduino pin directly without voltage divider.
You're welcome ^^
Not a perfect tool but get the job done :D
Great! Thank you. Can't wait to see your version :)
Love it! ^^
Tee Drawstring SandbagView Instructable »
Well, I myself do not do the math on the length of the spoke. The local bike store here has only one size of spoke for each size of the rim. So let's say I am using a 22" rim and I use only 10.5" spokes. Some spokes get into the rim much, so double wall rim is good. With single wall, they will stab into your inner tube for sure, so better get the appropriate rim to the hub instead ^^
Congratulation you have made it :)From what your explanation you are using 1K resistors. It means more current is flowing in the circuit (and the voltage is dropping) and the resistors are getting hot. If you use larger value resistors let's say 10K or even 100K, that means less current is flowing and less hot on resistors.It is important to use the same value resistors and connect your A0 at the middle of those resistors. It means we divide the battery voltage into half for A0 to read (max 5V), then we double the reading in the sketch to get back the battery voltage. For more than 10V battery, see previous comments where we can use 3 or 4 resistors and a little change in the sketch.If you plug A0 before resistor1, it means you read the battery voltage directly. It is okay if your batt...see more »Congratulation you have made it :)From what your explanation you are using 1K resistors. It means more current is flowing in the circuit (and the voltage is dropping) and the resistors are getting hot. If you use larger value resistors let's say 10K or even 100K, that means less current is flowing and less hot on resistors.It is important to use the same value resistors and connect your A0 at the middle of those resistors. It means we divide the battery voltage into half for A0 to read (max 5V), then we double the reading in the sketch to get back the battery voltage. For more than 10V battery, see previous comments where we can use 3 or 4 resistors and a little change in the sketch.If you plug A0 before resistor1, it means you read the battery voltage directly. It is okay if your battery is lower than 5V, then you need no multiplication by 2 in the sketch. But if your battery is more than 5V, then you will burn your A0 pin, or any other part of your Arduino at worst.If you plug A0 after resistor2, you will read zero voltage because your A0 is now connected to Ground.
Whoa!! My kids will love joining your class. I love the whells most, but all those Monster are amazing. Thank you for sharing :D
Machine Sewing Class
This is awesome! So cool :D
POV Globe 24bit true color and simple HW
Thank you ^^
This is what I find around, a truck's rear view mirror. The sunlight is coming from the right side. With the mirror reflector I get the whole dashes on the zoom grip into clear view. Well surely I will make an aluminium foil reflector when I need a larger reflection area.
Only if the tension spring off of its place causing the trigger fail to retract and no support to the rubber band holder. That's why I am using screws on that mechanical section instead of wood glue, in case I need to fix things. Plywood is soft and paperclip is smooth. I just afraid that it will slip out of its place when the trigger is pressed. But with the "S" way of attaching the spring, I am pretty sure everything will work good for a long long time ^^
Thank you. Yes it is that simple and working good without a single jam till today. The kids and I are playing with it longer than expected :D
Ouch.. same case as mine. If you are using single wall rims, then you need some shorter spokes so that they will not stab into your inner tube. I have double wall rims and they do not pass the second wall, so there won't be any trouble with my inner tube :)Good luck with yours ;)
Is it the vintage rims you want to keep? I mean you have the option to get a new rim (36h) with spokes or just get new spokes and use your favorite old strong rims :)Local bike stores in my city gives me no option. They simply ask you the size of your rims and they give you the spokes.My advice is : if your vintage rims are in bad rusty condition, then go get new shiny 36h alloy rims. But if the old rims are in good condition and bear some memories to keep, then go ahead, get the spokes and start lacing :)I have been using these rims until now and no single problem so far ^^
Auto reload? That is one good exercise for our brain :DI will publish soon I get the idea ;)
I am learning photography with my brand new (old released) Nikon D3300 :DAre you wondering how to get focus on the gun and also the target? Actually it is "two shots", one focus on the gun and the other focus on the targets, then blended into one photo :D
Extreme Scissor Lift Shoes
You are awesome, Inspector Gadget. Love all the metal tools you have. Cool workshop ;)
Mantis - The $20 Floating Leverage Table
This is cool. And portable. I am thinking of using a thicker tabletop and/or reducing the distance between the thumb and support arm. Drill two holes on the tabletop side to slide in (hide) the thumbs so that we get a clean flat table top and exact distribution distance of the legs every time we move it. Thanks for sharing this idea ^^
Thank you. Yes they do love it. Now they are forming team Rogue Three against Mon Mothma (Mommy), and I am Darth Vader (a dead Father). Seems like the blaster will soon be banned for messy rubber bands :D
Cassian Andor Rubber GunView Instructable »
Well, all that came to my thinking were "dry counter top" and "save a bucket of water". I don't need any bucket there anyway, but a bucket is always in my bathroom, so why not put it there and save some water? ^^ The floor is getting wet anyway, nothing to worry about.But then ... I learn to do my best to remember stopping the water rather than waiting for my permission granted :DThat will keep the counter top dry and also no wasting water ^_^
Do you use Arduino Uno and LCD? What is your battery maximum voltage? First, please check your battery voltage with a multimeter to make sure it has minimum voltage to run both Arduino and LCD (it must be around 6V or more).
Thank you. That is so true. So is Tomatoskins' idea drilling a hole and screwed on tripod mounting under the camera. But I picked this one because it is less bothering sitting on my camera strap rather than hangging and swingging around, and also the way I can bring extra memory without bringing the bulky camera bag all the time with me :D
Thank you ^^I was going to make an easy clip on the strap or belt. Then this idea of carrying an extra SD card, I can take like one or two hundreds more shots. I have several 2GB SD cards laying in my drawer :D
Camera Lens Cap HolderView Instructable »
Ouch.. I want one... well, some for my family :DAwesome!
You are welcome. You can also make your own Homemade Gift to put inside theand box and join the contest at https://www.instructables.com/contest/homemadegifts2016/^^
And free, and do what they supposed to ;)
Yes, it does. Thank you ^^
She's a great artist and making beautiful jewels. So inspiring ^^
Wall of Rainbow Koi
Well done. Check your inbox. There's a gift on Thanksgiving for "Made it!" comment ;)
Haha.. see.. now you know how to escape such situation on rainy days :D
Thank you, Sir ^^
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