About boosting battery volts? Answered

 If i use an XL6009 module to boost up my battery for example from 3.7 to 5 volts how it will effect on the battery my battery will drine much faster ?  will stay the same ? 

Question by NivA2   |  last reply


I would like some assistance in designing a digital LED display vacuum/boost gauge for a turbo application. Answered

Hello!   I'm new here. I would like some assistance in designing a digital LED display vacuum/boost gauge with both a linear LED display as well as two seven-segment display modules.   I plan to use a standard automotive MAP sensor to provide the -30Hg to  +30psi signal.   What I envision is having the two seven-segment displays sit next to a row of 28 green LEDs for vacuum to -28Hg, 7 yellow LEDs for pressure from +1psi to +7psi, and 8 red LEDs for pressure from 8psi to +15psi that light up incrementally as the pressure increases or vacuum increases from a center point of zero (clear LED always on).  The problem is that I have absolutely NO idea of where to start other than the layout of the LEDs.  So any help would be appreciated. Thanks! Skullmaster20  (Chris) Edit -----  This is a drawing of what I'm trying to create, and a picture of what I'm going to replace.

Question by skullmaster20   |  last reply


Why is my step up converter not increasing voltage and why output is a little lower than input?

My step up converter is not working ,it wont increase the voltage . I used a multi meter and the output ends up being lower than the input like for example when I connected the battery to it, the battery was at 8.40v and I checked the output and it was 8.10v . I was trying to make a DIY speaker for the first time,  I am new to this.  step up converter  is called a MT3608 LM2577. I got it off of aliexpress.     https://www.aliexpress.com/item/DC-DC-Adjustable-Boost-Module-2A-Boost-Plate-2A-Step-Up-Module-with-MICRO-USB-2V/32668154181.html?spm=2114.13010608.0.0.a2VAYu The battery i used is off a battery pack .it is 8200 mah and 9v

Question by Alex345   |  last reply


Making A Dual USB 3V TO 5V Converter, HELP?

So I was browsing the web and came across this "3V to 5V 1A DC-DC Converter Step Up Boost Module 1PC" and was curious to know if i could attach a "Dual Usb Type A Female PCB Connector Component" to it?  Is this possible,  because I know that the single "Step Up DC DC Converter Boost Module 3V To 5V 1A USB Charger" has one output connector. Therefore if i buy the module without the "USB PCB connector"  will it be able to support a "Dual Usb PCB connector" once I soldered it on?? 3V TO 5V STEP UP MODULE LINK:  http://www.ebay.co.uk/itm/1PC-1A-3V-to-5V-DC-DC-Converter-Step-Up-Boost-New-Module-/301725169466?hash=item464038b73a:g:n94AAOSwQJ5UR2eo DUAL USB FEMALE PCB CONNECTOR LINK: http://www.ebay.co.uk/itm/Desktop-Dual-USB-Type-A-Female-8-Pin-PCB-Male-Connector-10-Pcs-/291502771561?hash=item43deeb4d69:g:uiQAAOSwMmBVj~fc Please let me know if this will be applicable in response! thanks for your time ,RookieSean

Question by RookieSean   |  last reply


Upgrade LM358 to 25kHZ?

I have a 2khz lm358 square wave generator i want to boost it to 16-25khz max can someone tell me how link is item plus circuit diagram:::  http://www.ebay.com/itm/Pulse-Upgrade-LM358-Duty-Cycle-Frequency-Adjustable-Square-Wave-Module-NE555-/221623454225?hash=item3399c98a11:g:o70AAOSwD0lUfVW5

Question by TheGreatResistor   |  last reply


need to know?

I have a 4 battery pack  i want to use for an usb charger i need ro know what diode i need to use the battery pack gives off close to 6 v but i have a USB DC-DC Converter 3V to 5V 1A Adjustable Step-up Boost Power Supply Module. I know i need a diode i need so that the current from what  im chargeing does not go back into the battery but at the same time i need the batteries to give off as close to 5 v that it can work with the module. what i need is which one can i use to so this?  

Question by jsilvers1   |  last reply


Help with Solar USB charger

Hi I'm a bit of an electronics noob, trying to build a solar charger for my brother's phone when he goes camping. I've done some research on the net and built a prototype but for some reason it won't charge my phone through the USB. My circuit diagram is below. The only thing that needs more detail is the USB charging circuit, which is this one: http://www.dx.com/p/usb-dc-1-5v-to-dc-5v-voltage-step-up-boost-module-green-143571 Is my wiring setup correct? It may just be that the charging circuit is insufficient and will need to be replaced, but I would appreciate some advice before I go further. Thanks

Topic by binnye   |  last reply


Is reverse engineering illegal?

Is reverse engineering illegal? Well, if you then go on to sell your version? For example, in an upcoming instructable I'm modding some electronics, well, without revealing my instructable here's an equivilent example: Lets say I buy a little robot at the store, it has motors and the case and everything. Only problem is, it runs on AA's and you want rechargable batteries. Also, the wireless module for some reason is external and is super ugly and annoying. You crack open everything and you find that the needlessly large circuitboards only have about 20 (somewhat) easy to find components that adds up to like 2 dollars. Following traces, you recreate a schematic from the PCB (already did this, that was fuuunnn :P). Now you reengineer the board (still same schematic) so that it's much more compact, you've added a little charging circuit (and correspond boost circuit, replacing a couple of AA's with a lithium ion), and you made it all fit inside the robot (no wireless module just hanging around outside the robot. Now, essentially the schematic is the same, but you've added stuff like the boost circuit and charging circuit. You've also added a few customizing features that make it more special (adding LEDs, microcontroller, cough cough etc.). Would it be illegal to sell a board/kit (incase other people want the board and can't solder smd to good) for people to modify there own robot (same model etc.). Also, the schematic from the reverse engineering is very similar to an example circuit in the main chip's datasheet, and a few other parts are common sense (like some resistors here and there, LEDs, a few extra filtering caps), so the company's circuit is nearly identical to the datasheet, is this illegal to sell?

Topic by guyfrom7up   |  last reply


If I increase voltage input on audio amp, will the volume be able to get louder?

I'm planning on building a portable speaker/boombox and I was looking up some build videos and saw people having a voltmeter built into their speakers and when they increased the volume, voltage started dropping. The audio amplifier I was planning on buying stated that it can handle DC power 8-25v. So my question is, when I increase the voltage input, will the output volume be louder or what will it change, or does the volume rely on the speakers I'm using? Or will the volume rely on the batteries I'm using? Part list: -TDA7492P 25W+25W Audio Amplifier with Bluetooth https://www.banggood.com/TDA7492P-50W50W-Wireless-Bluetooth-4_0-Audio-Receiver-Digital-Amplifier-Board-p-1003047.html -Micro USB breakout https://www.banggood.com/CJMCU-Micro-USB-Interface-Board-Power-switch-interface-p-986085.html?rmmds=search -DC Step-up Module https://www.banggood.com/DC-Boost-Converter-2A-Power-Supply-Module-2V-24V-To-5V-28V-Adjustable-Regulator-Board-p-1100757.html -USB Charging module https://www.banggood.com/USB-Lithium-Battery-Charger-Module-Board-With-Charging-And-Protection-p-924048.html?rmmds=search -18650 Rechargeable batteries x2 https://www.banggood.com/2PCS-ICR18650-26F-2600mAh-3_6v-Rechargeable-Li-ion-Battery-p-915708.html?rmmds=search - 2x Visaton FR-13 30w(RMS) full-range speakers http://www.visaton.com/en/industrie/breitband/fr13_4.html - LED On/Off switch https://www.banggood.com/12V-16mm-Angel-Eye-Metal-illuminated-LED-Push-Button-Switch-Car-Dash-p-965911.html Also if anyone could check if these parts work together then it would be appreciated. NB! I'm new to this so if my questions sound dumb then don't judge :)

Question by Zerlen   |  last reply


18650 battery pack question

Hello everybody, I need to install (build) a recharging battery pack for my plant shelf.  it will be running an arduino nano, just 3 leds (3mm 20ma each) 1xNTC and 1x water sensor probes (nails).--  no LDR no yellow LED. . I was thinking about getting a 2x 18650 battery holder - I need more battery hours, should we wire the batteries in parallel to get more mAh and boost them 3.7V to 5V. so basically this is what I am trying to custom build to get more hours; DIY Mobile Power Bank Case Kit . I would just buy the mentioned product BUT under specifications>battery it says the capacity range: 1000mAh and below. but the batteries I have are 3.7V @ 5000mAh. does this mean that the remaining 4000 will be lost because the system can't handle it?  . basically what I am asking for is how can I make a long lasting arduino nano powering 18650 battery pack BUT also with a recharging module. these are the items I found that may work together, please remember that I have no electrical experience from before. I have learned everything that I know from instructables, this is a too advanced build for me to figure out without asking a few questions. thank you for your patience, let me know if I have to clear anything out. batt holder:  recharger: boost: am I even in the right track with this thing? can these be connected together and a switch. again, the goal is max battery life.. maybe add 4x 18650 - 2in parallel + 2in series, 7.4V to arduino Vin, eliminate the booster, even more battery life ? . thank you in advance, love & peace akin,

Question by Akin Yildiz   |  last reply


Electronic Circuit- Help

Hello,My name is Daniela, I'm student and I need help to anyone who can help me :DProject goal: Control the temperature inside a closed chamberI need help to connect the all components and I don't know how because I'm new in this . I don't know how to amplify and to maintain the current, voltage so as to the whole circuit should work, what value is need for resistance, capacitors and other necessary components.I use a launchpad MSP-EXP430FR4133. I prefer to use power supply 3.3V (not 5V). To amplify the voltage I use a DC Boost Converter 2A power supply module MT3608 where the module output voltage can be adjusted.The temperature sensors it for hot side and cold side of Peltier element. A good size to have on the hot side is about 3 times as big a heatsink than on the cold side to don't find that both sides are getting hot. I have attached below a Block diagram, a List of Components, Description and What it looks like the final project. Please help me :D :) Datasheet: MSP-EXP430FR4133 :http://www.ti.com/lit/ug/slau595b/slau595b.pdfs FAN-BM5115-04W-B50-L00 : :http://www.farnell.com/datasheets/2266998.pdf?_ga=2.72941011.1375318338.1566287615-2140457824.1565329371 LM35DZ/NOPB :https://www.ti.com/lit/ds/symlink/lm35.pdf LMT86LP :https://www.ti.com/lit/ds/symlink/lmt86.pdf TMP112AIDRLT :https://www.ti.com/lit/ds/symlink/tmp112.pdf TEC-40-33-127 :https://eu.mouser.com/datasheet/2/433/Wakefield_Vette_Thermoelectric_Cooler_Full_Data_Sh-1501217.pdf MT3608 :https://www.olimex.com/Products/Breadboarding/BB-PWR-3608/resources/MT3608.pdf

Topic by Daniela1111   |  last reply


Modding a cheap MIG welder?

I recently bought a cheap mig gasless mig welder and I was doing some online reading about it. So I found out a mig welder should be DC, with gasless having the clamp at + and the torch at - . However when I looked at the schematic (in the images) and inside the welder to confirm it, and it was AC. So it turned out really cheap welders are ac. So my I want to try mod it to be DC. My question was, what diodes should I use? What Capacitors and capacitance do I need? And how do I design a Choke? I was looking at getting this diode: http://www.ebay.com.au/itm/MBRP400100CT-400A-100V-SBD-Schottky-Barrier-Rectifier-Diode-Module-/160930207205?pt=AU_B_I_Electrical_Test_Equipment&hash;=item25783015e5&_uhb=1  And then putting two of them together to make a full wave bridge. Would a Schotty diode Work? Or do I need a stud diode? And about what capacitance do I need? Would lots of 2200uF 50v capacitors in parallel work? Could I put in a variable ballast? and where would it go, on the 240v side or the output? Lastly, could I also add a modded microwave oven transformer for low voltage high current in parallel to boost the power? I guess I would have to wind it to have a similar voltage. Thanks

Question by makincoolstuff   |  last reply


Arduino Uno Solar Battery Charger ?

Hello everyone. Newbie here.  My project is to make an environmental monitoring system that will be battery powered and charged using solar energy, when the system is not in use. The components I am using are listed below for reference.  Parts List: 1. Solar Panel http://bit.ly/2zimtCj  2. Rechargeable 9V Battery http://bit.ly/2DxPRma 3. Uno Rev 3 http://amzn.to/2DxVCQP 4. SD Module http://bit.ly/2DyDFl9 5. Grove Dust Sensor http://bit.ly/2Caxx6z 6. Grove Temp & Humidity Sensor http://bit.ly/2ybWbxG 7. Grove Light Sensor http://bit.ly/2Cj3Xem 8. ESP8266 Transceiver http://bit.ly/2zN3kEL 9. Grove Air Quality Sensor http://bit.ly/2khVUah All the components operate at 5v with the exception of the ESP8266 which is 3.3v. I have been looking at different methods of powering the system and noticed people using LiPo batteries. I'm aware that you shouldn't let there voltage drop too low and something about voltage regulators and boost converters that might be needed.  Based on my system can anyone recommend the best method of powering everything using batteries and charging it through solar energy.   I'm fairly new to the Arduino Eco system and this kind of work in general, so any help would be greatly appreciated. Thanks in advanced. 

Question by hymcode   |  last reply


Why less memory usage with more memory??

So.... seandogue uses a circa 1995 2005  (doh!) computer as his main desktop workstation (he also has a nearly brand spankin new superduperree laptop, but it's just not gertrude, if you know what i mean...) Anyway... My computer is old, yes, but relatively solid. A bit sketchy since it's XP but whatever. The issue is memory and memory usage. I just added a pair of 2G modules to boost it's effective memory from 2 to 3 G. )XP old and only acknowledge s the first 3 even though my machine can accept up to 8G Prior to the upgrade, my initial memory usage upon completion of windows load (desk is up and no more hourglass backgroundy stuff) usage was about 800M, prior to loading any "actionable" software (Ie, ignoring the sundry processes and applications that run automatically after on at boot...I mean programming IDEs, notepads, calculators, email, browsers, photoshop, cad progs, winamp, labview, music comp, etc.)  And now? darn if my baseline  memory load hasn't dropped over 60%, down to ~490M So. what gives, ibles-sages? Me, I'm stumped (seriously) .At first, I thought to myself, 'hrrrrm... maybe it has something to do with swapping...', but then almost immediately I discounted that, since I hadn't reached threshold for swap to engage. Then I thought,  "Is it possible there was damage on the 1G chips that would go unrecognized  but would cause memory load to be higher than it should have been? Are newer modules more efficient or something?" To add to the confusion, it *seems (I haven't done any serious forensics and really don't want to have to) . applications of various sorts seem to take less memory as well. Then I came here. kinda tired of hashing out every single solution all by my lonesome and I'm hoping someone will be able to clear that confusion up with an authoritative response. Just doesn't make sense to me why my load would drop by such a significant amount, and I'm really and truly tired as hell of speculating and of speculation.. Speculation eats time like dime store candy surrounded by a hundred hungry children. and it more often than not produces erroneous output.. (no, not looking to debate the efficacy of speculation either, My best feature is the ability to speculate, and it pays to know how, but even I get tired of living in a nebula of "there is no like right like answer" 100% of the time.) So heps a mind-worn joe, aye?  Someone please tells me in no uncertain terms why this is? >>>>  More memory added, less memory used? I really don't want to launch another google search that may or may not  yield the answer after reading a few hundred erroneous or misleading posts. To be very clear, the system is behaving BETTER, not WORSE, with the new modules, even when operating at quiescence, where max memory overruns (and the subsequent swapping that such overruns spur) aren't an issue.  thanks gracias danka...

Question by seandogue   |  last reply


Big battery bank project. Circuit related questions?

Hello everyone! I have a project in my mind and I would love some guidance and some ideas if possible. I already have a lot of 18650 batteries in an “acceptable” state (1800-2100mAh each) and I am planning to make a large battery bank, for use in camping mostly (smartphone charging, led bulbs, electrical air pumps 12v, etc) I did read a lot of articles in here about battery banks, but i didn't find something as complex as my idea. I have already made a 12v battery pack with 12x18650, 3 rows in parallel, of 4 in series in each row. My goal was to operate a 12v air pump for inflatable mattresses. It worked like a charm! (Also created with instructions from here! Thanks for that!) But since my “DIY disease” does not leave me in piece… I want to build a large enough pack that can support the following: 1) 12v car plug 2) 5v/1A + 5v/2.1A USB plugs 3) charge circuit for the battery pack, so I will no longer have to remove the batteries to charge them separately 4) switches in each plug 5) led voltmeter also with switch ?) at some point I would like to add a circuit to charge it with a solar charger or a mini wind turbine that i will create at some point with my 3D printer, but for now let stay with the basic stuff! For the case i will use a modified screw organizer case, with those classic 18650 black holders from ebay. (photo below) The case will fit almost 8 to 10 holders (4x18650), so we are talking for 32 to 40 batteries... My main concern is the circuit design. I have done a few simple things in the past, but this is a bit more complicated and that is why I want your guidance/ideas. How to safely connect all those things together or maybe suggest a different plan/design, cable thickness, etc... Links gathered so far: I am thinking about 4S in a row. Is that too much? Or should i consider 3S? 3S Li-ion Charger PCB with BMS For charger... something like this maybe? 12.6V 5A Charger optional... maybe i could fit sothing like that, for laptop charging? 150W DC-DC Boost Converter for 5v 1/2.1Amp charger i m looking at this. 5A Charger Step down Module for usb/12v plugs/voltmeter i am considering this option. Thanks in advance for your time!

Question by the_phantom_boy   |  last reply