https://community.element14.com/technologies/circuit-protection/A group set up to discuss all elements of circuit protection from replacing a cartridge fuse, to latest technology ESD protectors.en-USTelligent Community 12https://community.element14.com/technologies/circuit-protection/f/forum/55242/lithium-battery-charger-board-with-confusing-connections/225195Fri, 08 Nov 2024 21:32:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:0b018d62-7202-489b-acec-37df42365604shabazTook a photo since I was charging my flashlight battery.. This 14500 battery has less than a quarter of the energy that the one you're using advertises. And it costs more than 6 times as much and has various built-in protection features. And built-in charger, with status indication LED.https://community.element14.com/technologies/circuit-protection/f/forum/55242/lithium-battery-charger-board-with-confusing-connections/225042Mon, 04 Nov 2024 16:45:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:f887a076-15c5-46fe-a578-856464fa7cc1colporteurThanks BD! Another 20 minutes gone with my missus asking what are you looking at.https://community.element14.com/technologies/circuit-protection/f/forum/55242/lithium-battery-charger-board-with-confusing-connections/225026Sun, 03 Nov 2024 19:54:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:71479586-e6af-4fab-8c15-bf54f3d4c483shabazThe text isn't clear. I think it's better to just use a board with better description/documentation. Adafruit will have some. And the actual battery you choose might have protection built-in, I hope you're not actually intending on using those AliExpress batteries. Some 14500 batteries come with an in-built USB port incidentally, and then the problem of charging circuit goes away completely.https://community.element14.com/technologies/circuit-protection/f/forum/55242/lithium-battery-charger-board-with-confusing-connections/225018Sun, 03 Nov 2024 11:22:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:139174d0-7577-4744-8d74-df8474f3e346rictrajanoWhy does it give you the impression that I wouldn't need to use the jumper or BMS? The charging speed is not too bad actually.https://community.element14.com/technologies/circuit-protection/f/forum/55242/lithium-battery-charger-board-with-confusing-connections/225017Sun, 03 Nov 2024 11:21:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:f942909e-883d-4373-b571-747dcd408f83rictrajanoThanks, I also follow Big Clive and seen the video. This is for one battery only though and doesn't address the charger I'm using.https://community.element14.com/technologies/circuit-protection/f/forum/55242/lithium-battery-charger-board-with-confusing-connections/225016Sun, 03 Nov 2024 11:17:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:b3b0dd80-5ac3-4eaf-9ab3-8d9bb4ea0250rictrajanoThanks for your help. I'm well aware that the charge is not what is advertised, just wanted to show exactly what I was using. My concern is more about if I would need or not the BMS. The adjusting screw bit is on the step up part of the circuit and not on the charging side. Thankshttps://community.element14.com/technologies/circuit-protection/f/forum/55242/lithium-battery-charger-board-with-confusing-connections/225015Sat, 02 Nov 2024 20:37:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:09384bd4-e273-43b3-93b4-6c3309d8aff2beacon_daveBig Clive's video on simple charging/protection of Lithium batteries may be of interest https://www.youtube.com/watch?v=M88e1r8nvYkhttps://community.element14.com/technologies/circuit-protection/f/forum/55242/lithium-battery-charger-board-with-confusing-connections/225014Sat, 02 Nov 2024 20:00:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:ff65848e-787d-48a4-b0ae-aa550739be72shabazThere isn't even a remote chance that those batteries will support the capacity they claim. You won't get the capacity claimed from a single cell, even if you parallel three of them. Even a single 18650 sized cell can support more capacity than three of those batteries. I think you'd be better off buying your batteries from a (reputable) local supplier to you, rather than these from aliexpress. Also, regarding: " After connecting the wires, you can use a screwdriver to adjust the output voltage you want. " That doesn't sound like a good charging circuit. For something reliable, see if (say) Adafruit has anything suitable, I think they will.https://community.element14.com/technologies/circuit-protection/f/forum/55242/lithium-battery-charger-board-with-confusing-connections/225013Sat, 02 Nov 2024 19:50:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:9961218c-91ec-45ba-8afb-a533dd6102fcdougwIt sounds like you don't need the jumper and you don't need a BMS. The charge current is set for a single cell so it may be quite slow to charge multiple cells in parallel.https://community.element14.com/technologies/circuit-protection/f/forum/55242/lithium-battery-charger-board-with-confusing-connections/225006Sat, 02 Nov 2024 09:50:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:4b45da6a-9f45-4afb-8700-12f6f98e8c34rictrajanoThis is the battery I'm using: www.aliexpress.com/.../1005007800512403.html There is no protection circuit. Any idea on the second question? Thank youhttps://community.element14.com/technologies/circuit-protection/f/forum/55242/lithium-battery-charger-board-with-confusing-connections/224994Sat, 02 Nov 2024 06:03:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:88bf48f2-e468-432c-8abd-dd4cdea21af2bidrohiniIf each 14500 battery has its own integrated protection (like protection circuits built into the battery itself), the need for an additional BMS may be less critical. But if the batteries are unprotected, then adding a BMS is definitely recommended.https://community.element14.com/technologies/circuit-protection/f/forum/55242/lithium-battery-charger-board-with-confusing-connectionsFri, 01 Nov 2024 20:43:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:fb661796-b752-450c-9de3-37a721047536rictrajanoHello Smart people, my objective is very simple, to connect 3x 14500 3.7v lithium batteries in parallel and charge them with this module: https://www.aliexpress.com/item/1005004957459719.html?spm=a2g0o.order_list.order_list_main.38.44211802hKnngk#nav-specification I have two questions: 1 - Would I need a BMS? 2 - In the product's description they reference two pads that should be shorted if your batteries don't have discharge protection (or is the other way around?) I can't really understand the english. Would someone be able to understand what should be done in which situation? Here's the description Instructions for use Output voltage adjustment potentiometer VO+VO. IN-IN+ output input LX-LCBST VO+ Vo B+ B- T point battery output battery The module supports type-c interface input and solder joint input of back annotation input. You can choose one, the recommended voltage is about 5V. The module is marked with two outputs. The two outputs are the same, and the lines are connected in parallel. You can choose one of them. The following focuses on connecting the battery. If your battery comes with its own protection board, you can choose our package without discharge protection. After the battery is connected to B+ and B-, you must short the T point to charge and discharge. If your battery does not have a protection board, choose a package with discharge protection. This is very important, because over-discharge of the battery is likely to cause the battery to be scrapped. Most of similar competitive products do not have discharge protection. After -, the T point cannot be shorted, otherwise the discharge protection will be invalid. After connecting the wires, you can use a screwdriver to adjust the output voltage you want. The battery chooses 3.7V lithium battery, and the full voltage is 42V. The battery type can be 18650 polymer and other batteries. Thanks for your helphttps://community.element14.com/technologies/circuit-protection/w/setup/26624/featured-content-triptych-setup-docTue, 10 Sep 2024 12:39:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:6df51994-badf-4f0e-bb9e-99e946a44dd0vijeth_dsSurge Protective Devices Quiz There are a variety of technologies designed to keep electronics safe from power surges. Take our quiz to test your knowledge about Surge Protective Devices.e14quizhttps://community.element14.com/technologies/circuit-protection/w/setupTue, 10 Sep 2024 12:39:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:0db0e2aa-50b6-4bc6-bc7e-9657c200358chttps://community.element14.com/technologies/circuit-protection/b/blog/posts/signal-amplitude-problem-due-to-tvs-diodes-impedance-matching-problemSat, 27 Jul 2024 21:46:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:26d43b71-661b-4d5a-ba32-697edd0255fdZainiiHi everyone, I hope you are fine. I have a question. I have generated a 4Vpp signal with a 5MHz frequency using the following sequence: AD9851 (DDS) → AD8001 (Op Amp) → Ferrite bead (2KΩ) → Microfluidic sensor This signal is connected to a microfluidic device whose impedance varies from 3KΩ to 10KΩ. When I attach any through-hole TVS diode with a Reverse Stand-Off Voltage (V_R) rating of 6V to 30V across the signal, with one pin grounded and the other pin across the signal for circuit protection, it drops the signal to less than 1Vpp. My questions are: Why does my signal amplitude drop significantly, even though the Reverse Stand-Off Voltage (V_R) is much higher than the signal amplitude? I want to match the impedance between my microfluidic device, which has an impedance ranging from 3KΩ to 10KΩ, and my signal, which currently has an impedance of 50Ω without the ferrite bead (2KΩ). a) How can I increase the impedance of the signal? b) When I add some series resistance across the signal, it greatly reduces the amplitude. Please suggest a solution to match the signal impedance with the microfluidic impedance without dropping the signal amplitude. C) does connecting a ferrite bead of 2KΩ in series to the signal add to the overall impedance of the signal? The AD8001 has high input impedance and low output impedance, making it perfect for this application. Your response would be highly appreciated.tvscircuitcircuit_protectionhttps://community.element14.com/technologies/circuit-protection/w/quiz/27476/surge-protective-devices-quiz-resourceThu, 06 Jun 2024 16:25:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:96aea859-614d-4b2d-b140-f9bc25aefb3epchansponsored by Quiz Resource | Passive Components | Power & Energy | Circuit Protection | Quiz Question 1: NEMA: Surge Protection FAQs Question 2: Characterization of the lightning wave Question 3: The components of a SPD Question 4: Transient Overvoltage Protection Question 5: Surge protective device types | type 1,type 2,type 3,type 4 Question 6: Surge protective device types | type 1,type 2,type 3,type 4 Question 7: Surge Protective Devices (SPD) Question 8: New Surge Protective Device Solves Circuit Protection Design Issues Question 9: Designing Effective Surge Protection for AC and DC Powered Systems Question 10: Circuit Protection III: Surge Protection Question 11: IsoMOV ™ Hybrid Protection Components Question 12: Understanding Elusive Vfp and its Effects on Surge Protection Performance Question 13: Tips on Selecting the Right MOV Surge Suppressor Question 14: Designing Effective Surge Protection for AC and DC Powered Systems Question 15: New Surge Protective Device Solves Circuit Protection Design Issues Question 16: Advancing GDT Technology to Meet Higher Surge and Multi-level Protection Requirements Question 17: Gas Discharge Tubes (GDTs) Question 18: Gas Discharge Tubes (GDTs) Question 19: New Surge Protective Device Solves Circuit Protection Design Issues Question 20: New Surge Protective Device Solves Circuit Protection Design Issues Question 21: Specifying Bourns® Surge Protection Components for UL/IEC 62368-1 Compliance Question 22: Specifying Bourns® Surge Protection Components for UL/IEC 62368-1 Compliance Question 23: New Surge Protective Device Solves Circuit Protection Design Issues Question 24: IsoMOV ™ Series - Hybrid Protection Component Question 25: IsoMOV ™ Hybrid Protection Componentssurge protective devicesquiz resourcesurge protectionbourns