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Gemsung Electronics
Registrace 25. 08. 2020
RF Communication with nRF24L01+
Explains the features and specifications of nRF24L01+ device.
Operation of the device is demonstrated with a simple code of an LED blinking example.
* Basic 1:1 communication demo code
- drive.google.com/drive/folders/1uH29Mfj8yUVsarMlSKOjOiLvSYebPMiU?usp=share_link
* Multiceiver demo code
- drive.google.com/drive/folders/1of_IisYjEk1WchJlc-q9e-XLLWs4b77u?usp=share_link
Operation of the device is demonstrated with a simple code of an LED blinking example.
* Basic 1:1 communication demo code
- drive.google.com/drive/folders/1uH29Mfj8yUVsarMlSKOjOiLvSYebPMiU?usp=share_link
* Multiceiver demo code
- drive.google.com/drive/folders/1of_IisYjEk1WchJlc-q9e-XLLWs4b77u?usp=share_link
zhlédnutí: 1 022
Video
Active Balancer vs Passive Balancer (Part2)
zhlédnutí 10KPřed rokem
This is the part 2 of the balancer series. It contains the test results and explanations for some unsatisfactory results in the part 1 video. Hope these series of videos help you selecting the best balancer option for your needs. Thank you!
Active Balancer vs Passive Balancer
zhlédnutí 48KPřed rokem
Introducing various balancer modules for Li-ion batteries. Compares each module with actual test results.
How to make a variable load with a MOSFET and PI controller
zhlédnutí 1,3KPřed 2 lety
This video introduces how to make a variable load with a MOSFET and PI controller. It includes how to model the system to a transfer function, and use the root locus and step response to find the optimum gain for the PI controller.
How to make a capacitive spot welding machine with a single 18650 battery
zhlédnutí 939Před 2 lety
Explains how I made a capacitive spot welding machine. No Huge Batteries Required!! 20V is required for spot welding. (Introduced in the demo) * Part Lists - Electrolytic Capacitors 10000uF(x4), 6800uF(x4), 4700uF(x5) - Opto-Coupler (PL817C) - Diode (1N4002) - Resistors 10ohm(x2), 2.2kohm(x2), 220ohm, 4.7kohm - N-Channel Power MOSFET 4N04R8 (x2) - 18650 battery (3000mAh) - Step-Up Regulator Mod...
How to make a Capacitive Touch Sensor on a PCB - Part2
zhlédnutí 7KPřed 2 lety
This video explains how to make a capacitive touch sensor on a PCB. Designing touch pads and shields for blocking EMI with FDC1004 touch sensor IC is also introduced. Demonstrates schematic to PCB design with EasyEDA, and shows how to use the touch sensor in the Arduino environment.
How to make a Custom Arduino Board - From Schematics to Programming
zhlédnutí 2,8KPřed 2 lety
This video explains how to make a custom Arduino board. It includes the most basic considerations when designing a hardware. From selecting MCU, designing power and the host interface. Also, introduces programming the bootloader and a simple application to your custom board with a demo.
Passive Balancer BMS for Li Ion Batteries
zhlédnutí 3,9KPřed 2 lety
Introducing 4S BMS with passive balancing features. Review and verify the specifications through charge and discharge tests.
How to make a Capacitive Touch Sensor with Arduino - Part 1
zhlédnutí 5KPřed 3 lety
Introduce basic operating principle of a capacitive touch sensor. Demonstrates how to implement a touch sensor with Arduino. Shows the result of the waveform when touch is introduced. Live demo is included! Arduino code used for the demo: drive.google.com/drive/folders/1vp1mY8li51-Zl_Ur6T1qG8v-p40mK7TG?usp=sharing
How to convert a PWM Signal to Real Analog using RC Filter (with actual measurements and analysis)
zhlédnutí 11KPřed 3 lety
Introduces how to design a RC Filter for converting PWM signal to analog signal. Formula and criteria to decide the component values are explained. Time and frequency domain analysis is done through actual measurements.
How to design your LED driver with EasyEDA
zhlédnutí 5KPřed 3 lety
Make your own, one and only LED Driver with the features you need! Find out how to - Design Schematics & PCB - Order PCB and Parts Demo for the designed LED driver is also introduced! * PWM Dimming Control Arduino Code drive.google.com/drive/folders/1kmQZjWRNoTk9Yrt1upoPfo2m9_8iYpVL?usp=sharing 00:43 AL8805 Introduction 02:33 Parts Selection 05:20 Easy EDA Intro 05:38 Schematic Design 09:04 PCB...
Using LED Drivers with Dimming Control by Arduino
zhlédnutí 10KPřed 3 lety
Introduces the specifications and operation of PicoBuck LED Driver from Sparkfun. Actual measurement of the current limiting feature is shown, with a demonstration of dimming control performed by Arduino with DC and PWM control. * PicoBuck PWM Dimming Control Arduino Code drive.google.com/drive/folders/1kmQZjWRNoTk9Yrt1upoPfo2m9_8iYpVL?usp=sharing
How To Light Up Multiple High Power LEDs
zhlédnutí 1,1KPřed 3 lety
This video introduces several methods for illuminating multiple high power LEDs.
How to select a resistor for your application
zhlédnutí 593Před 3 lety
Explains key specifications of the resistor and how these are related to each other. After studying this video, you will get a better understanding of the specification of a resistor and how to select an appropriate one for your application. Please refer to the link below for the resistor selection guide spreadsheet. drive.google.com/drive/folders/1ITYHJJ2FyKSgMebPVIrCTZP2zosPU4U0?usp=sharing
How to charge 18650 battery using 3-Pot LM2596 Module with Demo and Schematics
zhlédnutí 17KPřed 3 lety
This video shows how to charge 18650 battery with a 3-Pot LM2596 CC/CV Module with demo. Detail operation of the 3rd potentiometer is also explained. Schematics of this module is introduced for those who would like to look into more details. Check out my other video which explains in great detail of the principle operation of buck converter and CC/CV functionality. * czcams.com/video/af3L-t_uFt...
LM2596 CC CV Module - Operating Principles (With Demo)
zhlédnutí 9KPřed 3 lety
LM2596 CC CV Module - Operating Principles (With Demo)
Digital Potentiometer (X9C103S) Introduction and Demo with Arduino
zhlédnutí 55KPřed 3 lety
Digital Potentiometer (X9C103S) Introduction and Demo with Arduino
Battery Management System (BMS) for a Lithium Ion Battery (with HX-2S-01)
zhlédnutí 42KPřed 3 lety
Battery Management System (BMS) for a Lithium Ion Battery (with HX-2S-01)
18650 Li Ion Battery Charger DIY (with TP4056)
zhlédnutí 48KPřed 3 lety
18650 Li Ion Battery Charger DIY (with TP4056)
INA219 Current Sensor Tutorial (with Arduino)
zhlédnutí 8KPřed 3 lety
INA219 Current Sensor Tutorial (with Arduino)
Thank you so much I love you (i'm not a bot, i really enjoyed the technical exploration of active balancing. find it anywhere else!)
I don't think you're right. I think there is some other explanation (other than the capacity)
Thank you for watching!!
Awesome
Thank you for watching!!
Now, that's a real tutorial. Thank you buddy.
Thank you for watching!!
I made this but resistance not vary up to full 10k it vary hoti 5.7k. what is the reason
Thank you . Great
Great to hear it helped! Thank you for watching!!
Well thanks a lot, this video is gold. Full of useful information.
Is there any chance you prepare a video explaining current mirror?
Thank you for watching!! I'll keep that in mind!!
Thank you, brother. Why do we disconnect the active equalizer when we are not using the cells?
Hello, Active balancers are equipped with capacitors, which suffers leakage current by a small amount. Though it might be small, it can discharge the cells at a faster rate. So, if you are not going to use the cells for a long time, it is better to disconnect the active balancer. Thank you for watching.
Excellent video, thanks! Is there a way to tell, which type a balancing a device is using without seeing the BMS?
Hi, thank you for watching! If you can measure the voltage of each cell, then you might be able to tell which type of BMS is used. But it would not help if the cells are perfectly balanced. I would recommend asking the manufacturer or taking a peek into the battery pack :-)
I was told that the AL8805 is obsolete. Can I use an AL8835 instead? ty
Hello, thank you for watching! Are you referring to AL8853? If yes, you can use AL8853 for driving the LED, but you need an extra circuitry (including the mosfet) according to the datasheet of AL8853. Hope this helped!
thank you, very informative. Quality information
Thank you for watching!!
Good job. Nice Explanetion.
Thank you for watching!!
WARNING: You are assuming cells are Lithium iron as found on most e-bikes - these values would be dangerously high for Lifepo4 which us becoming more popular and should be 3.65v
Sir , how to make 2S2P battery bank ?
Hello, In order to make a 2S2P battery bank, just treat 2 batteries as one. Connect two batteries with the same polarity, and then connect these two packs in series. Thank you for watching!!
Larger cells on a lower capacity rated active balancer would make no difference... it would just take longer to balance them if they get out of whack... I used one on a 30Ah pack 3s16p design, took ages to balance but that is because the BMS and its passive balancer somehow managed to make banks 1 and 2 go to 0 volts and bank 3 was at 4.25(ish) volts probably closer to 4.3-4.35 volts because my meter was reading low because of a dead battery in the meter. So the amount of energy it had to transfer was closer to what a 100Ah or 500Ah would require... because I basically had to transfer the entire capacity of one bank into the other two. It took so long that I had to help it along by charging the 2 low banks and discharging the high bank via external chargers and loads. If your bank is carefully matched (as mine was, within 50mAh or less out of 30 000 mAh total), then your balancer wont do much work as the cell banks are going to be close just naturally, no matter how large the bank, what matters is the difference in capacity between each bank. A gigantic 1000 Ah pack could be balanced by an active balancer made for a 20Ah or less pack if either the charge current is low enough and you are OK with the slow balance, or if the pack is very well balanced so each bank of cells is very close to the others in capacity right off the bat. If you took my pack, and you multiplied it by 10, so its 3s160p, it would have ~300Ah and the balancer I use would still be sufficient because I would have matched all the cells so that each parallel bank is very close to the others (like <100mAh or even around 50mAh like mine is, more cells means I can probably get a better match). It's about the relative difference in capacity between each bank (or cell) and the rate at which you are willing to balance at. I personally prefer a slower charge and balance because that is easier on the cells and my cells are so worn out from being salvaged from the e-waste pile that they struggle to charge or discharge even at 0.5 A (500mA) per cell... well some are OK and probably could do more than I bothered to measure, but some are so worn and have such high internal resistance that I just made the whole pack large enough that the cells wont be pushed much past 0.3A (300mA) per cell... plus more battery life and easier on the already worn cells.
Thank you this was very helpful
Thank you for watching!!
This is exactly the video I need, such informative. Thank you so much! Side note: your 7 parallel 18650s are over 70Ah, that's an average of 10Ah each, which is something unheard of. Don't you think its exaggerated? They're most likely less than 3Ah each. So inductive balancer should have worked?
thank you for the info man. i want to use this module with 5 pieces lm2596T. i want to use only this 1 module and current control for all of them.can i do it for only 1 this module for 5 of lm2596? i want to use this module but i want to connect other 5 x lm2596. and i just think i need to connect all of them 4.pin on this module on lm2596. i just need to know what can i connect lm358 1.pin to increase current for 5 x lm2596's 4.pins..what do you think about this idea? and the final result i expect that i i just this module control but i will 3x8=18 amp control. thanks for the video again...
Very good and transparent content. Awesome👍
Thanks!!
Thank you this is exactly what I'm looking for for my next project!!
Thank you for watching!! Hope you succeed with your project!!
Now we just need the Qualcom QC 3.0 module to make a proper phone charger for a proper phone 😅
Great idea 😀 Thank you for watching!!
like the data, hate the robot voice
Sorry for the disappointment. Thank you for watching!!
This passive balancer does not make sense because it drains only 68ma. At least 500ma would be ok.
Balancing is achieved during the final stage of charging when the charge current is very low. For this reason, the drain current need not be large. Also, increasing the drain current can limit the current, which can be used for charging other cells. Waisting the current can be another reason for not increasing the drain current. Thank you for watching!!
Low currents are all that are required for well matched packs. I made a 3s16p pack from salvaged (garbage) cells... I managed to get each bank to within 50mAh of each other which is impressively tight... until you realize the pack was ~30 000 mAh large... that is a *TIGHT* match. But my BMS which uses a passive balancer somehow managed to make 2 banks go to 0 volts (Not safe) with one bank at 4.25 volts (closer to 4.3 volts because my meter is out a bit). IDK how that happened, my cells were each tested to hold a stable full voltage for more than 2 weeks when left disconnected so that shouldn't happen. I used an active balancer to fix it but it was going to take a while, I helped it along by draining the high bank into some incandescent lights and I put external chargers on the low banks while the active balancer did its thing. Now my pack works again. But, if my pack had not been let go out of balance, the passive balancing would have been overkill, it was rated to 100mA but even 68mA would have been overkill given just how darn close my pack was. Even new cells are not always that closely matched... lots of cells in parallel means the average of them all is pretty close across the pack.
This little PCB will be damaged by connecting the battery reversed ( so I am informed ? ) .... so ALWAYS double check before you use it .....tip # 34 ................ DAVE™ 🛑
Hi I made your spot welder I know this video is 2 yrs old . works fantastic . I did a few mods . ie what I had on hand. total cap 100mF working @ 13 volts as i only had 16 volt Big Ass caps . Thanks great work well explained
It's great to hear it worked!! Thank you for watching!!
thank you for your detail explanation
Thank you for watching!!
Can you give an example of using DC electricity?
Hi, the usage of DC is huge, including all the digital circuits! I think you can get a better idea by searching "where is DC used" in the internet. Thank you for watching!
Thank you very much for your informative video. Can you explain to me how we can install the boot loader through a separate ISP programmer instead of doing it by using another Arduino board?
2.4 volts.. hahaa yea if you want your battery to die faster I guess. Rest of the video is great, but li-ion shouldn't go below 3v.. 3.2 ideally
Depends on the cells, higher capacity can be discharged to 2.5V, some even as low as 2V I've seen depending on chemistry
@@daijoubu4529 this is li-ion. There is only one chemistry being discussed. I even said the chemistry in my post. So what you said makes no sense.
@@gg-gn3re there are at least 3 kinds of lithium chemistry: Lithium Cobalt Oxide, Lithium Manganese Oxide, Lithium Iron Phosphate
@@daijoubu4529 I said lithium-ion, learn to read. stop digging your hole
Lithium-ion batteries are a broad category of rechargeable batteries that use lithium ions as the primary source of energy. Within this category, there are many different types of lithium-based batteries that use different cathode materials, such as lithium cobalt oxide (LiCoO2), lithium nickel manganese cobalt oxide (NMC), lithium nickel cobalt aluminum oxide (NCA), and lithium iron phosphate (LiFePO4), among others. Each of these chemistries has its own unique properties and trade-offs in terms of energy density, cycle life, cost, safety, and other factors. So, when people talk about "lithium-ion batteries," they could be referring to any one of these different types of lithium-based batteries, depending on the context.
hello. how can the signal obtained after the rc filter be played on a 3-4 ohm speaker without affecting the signal and the output frequency? I'm trying to play a sinusoidal frequency of 8 Hz, the result of a pwm signal from arduino and an rc filter. I got the desired frequency and shape, but I can't play it on a speaker. do you have an idea how to do it?
Hello, thank you for sharing your concern. Have you measured the waveform after connecting to the speaker? I wonder whether the waveform is consistent before and after connecting to the speaker. Also, it seems you want to play 8Hz sinusoidal waveform through the speaker, but I'm not sure if you can hear the soundwave of such low frequency. How about increasing the frequency to some hundreds of frequency range? Why would you need an RC filter for your application?
This that good stuff.
Thank you for watching!!
why not use tp4056?
Hi, this video was intended to show a different way to charge a Lithium polymer battery. And yes, you can definitely use TP4056 for charging these batteries as well. Please refer to the link below for charging Lithium polymer batteries with TP4056. Thank you for watching!!
Your inductive balancer is broken. Get a new one and re-test.
Hi, I think you are referring to the capacitive balancer since no inductive balancer is used in this video. Can you be more specific on which point you think the balancer is broken? Thank you for watching!!
@@gemsungelectronics460 5:30
"no inductive balancer is used in this video" 5:27 timestamp
loved the video. As you stated, Active balancers are recommended for higher Ah capacities, and you gave some high examples. Would you recommend using active balancer if I were planning on making my own portable phone charger at roughly 20 Ah?
If you're making a portable phone charger you can put your batteries in parallel (4.2V max) and let them balance themselves without a balancer. I believe this is how most USB power banks work.
Very interesting
Thank you for watching!!
No schematics? 🤥
The settling time of the RC filter to 8-bit precision is approx. 6xRC= 6x 0.13sec ~ 1sec. This is a major drawback of the PWM to analog.conversion
Which software have you used for the plot of the graph (as shown in 5:30) ?
Hi, I've used matplotlib from Python to plot the results. Thank you for watching!!
If possible can you help me to make an LED PCB with driver using ZXLD1362ET5TA IC.
I've 24V 150W SMPS. Can I use this LED driver to power up 8 LEDs in series at 1A?
Very well explained ..
Thank you for watching!!
Please tell us can we supply 0 to 5V by this with Arduino programming
Yes, you can control the wiper value of this potentiometer with Arduino from 0V to 5V. Thank you for watching!!
Can we expect drawing voltage from 0 to 5V with it directly with nano
@sumankar4873 Do you mean whether we can power the potentiometer with Arduino nano? Then yes, you can power the potentiometer with 5V coming from the Arduino nano.
Thanks. This video helps a lot . But i have a question, How can i get the curves???
The configuration of the test is introduced in the slides, and the tool used for drawing the plots is python matplotlib. Thank you for watching!!
what did you use to plot the battery voltages?
Hi, I usually use the matplotlib from Python and sometimes use the plot function from MATLAB. Thank you for watching!!
Hi sir, can i ask? I want use digital potensiometer without using button. If it possible? Using only command in arduino? And how to program without button
Hi, the button in the video was just used for demonstration purposes. So yes, you can definitely get rid of the button and program it in the Arduino. Programming the Arduino is dependent on what you are going to build. For example, you can read data from the sensor for adjusting the potentiometer. The sensor can be replaced with ADC or any kind of device that can provide feedback from the adjustment. Thank you!!
This video was really clear. Thank you!
Thank you for watching!!
Amazing. Thank you very much 👏
Thank you for watching!!
Thanks for the video. So what I'm gathering is that the balancer is only necessary for batteries in series. Does it follow then that battery cells wired in parallel will self-balance? I'm only building a small 2S battery with 4 18650 cells total, so I don't know how important balancing would be, but I'm trying to learn as much as possible before moving forward. Thanks!
You are right. The balancer is only necessary for series configuration. I would recommend using a passive balancer when you are building 2s with a total of 4 batteries because the capacity between all the cells is not exactly identical. There are many 2s balancers you can find from online markets. Thank you for watching!!
@@gemsungelectronics460 Thanks!
thanks for providing such an interesting experiments I am wondering, about using at the same time both passive and active balancers, it seems like a good idea. You showed it on you representation scheme but I didn't hear any words. is that a good and safe approach. It looks like passive one works great for charging, active for discharging. Mixing them altogether helps to achieve better overall result. Waiting for your reply. Thanks!
Hi! Thank you for watching! Passive balancing works well for charging, and active balancing works well in both charging and discharging. I'm not sure about the benefit of using both balancers at the same time. Active balancer balances the cells whenever the potential is above threshold, at a cost of increased standby power consumption. Passive balancer, on the other hand, dissipates power while balancing. Active balancers are good when your cell capacity is large and can be charged frequently. If your cell capacity is small and not able to charge frequently, then I recommend using the passive balancer. Hope it helps!
@@gemsungelectronics460 yep, it helps. Thanks for such a comprehensive explanation
This is really helpful!
Thank you for watching!!
thanks
Thank you for watching!!