Anyway the OP2177 should even include some internal diodes. http://elektrotanya.com/?q=hu/content/hc-dso2100-pc-oszcilloszkop-jel-vizszintesen-remeg-megoldva
Safety Symbols Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. This is a review on the Korad KA3005P (30 Volt 5 Amp Programmable) DC Power Supply. We believe that with your support, we will do better. Usually D3 should be a rather beefy one, so it can stand as much as the strongest supply someone might put in series. You can download the driver zip file here: download link. Please tick the box below to get download link: Tiszteletem! If you don't won't to poke around the circuit when life, one can usually solder wires to the test-points and connect everything to a DMM / scope before powering up. Ez az talakt +/-5V-ot llt el ganknt 1,5A-es terhelhetsggel. Add proper temperature control to the fan. Can't read the markings, but they look like they might be op-amps to me. Ezt talltam: MEAN WELL DKE15A-05
The user interface is easy to learn, as is the PC software. As a retired engineer, I'm used to using the high-end stuff, but $500+ is a little much for home use. 19% MwSt. Every solder point I touch brings a PCB closer to death I'm more a software person So I'm glad the debug connection is working. 50 Ohm-1K range) between the power output and the sense line. The more normal way to protect again a lost sense connection is having a resistor (e.g. This, of course, has displays for both voltage and current, and can be programmed so that a pre-programmed current is not exceeded. Service manuals, schematics, eproms for electrical technicians, If you get stuck in repairing a defective appliance. The zener diode for protection might cause some errors due to leakage. JavaScript is disabled. The circuits in these cheep supplies are really as simple as possible and may evolve over time. Owon ODP3033 power supply KORAD KA3005P display schematic errors upand_at_them Apr 9, 2022 U upand_at_them Active Member Apr 9, 2022 #1 See the attached image. Good practice was used. So maybe at least a 5 A type, maybe more. Reviewed in the United States on May 18, 2015. Your recently viewed items and featured recommendations, Reviewed in the United States on March 22, 2013. Only a couple of ohms between the inputs of the array to ground. http://www.tme.eu/hu/details/dke15a-05/dcdc-konverterek/mean-well/
License. So I have a faulty KA3005D and maybe someone finds the information helpful I have gathered so far (unfortunately I am not done yet). Table of Contents Bill of Materials (BOM) Pictures License Contact Bill of Materials (BOM) 7 Yanhe North Road, Liaobu Town, Dongguan City, 523000, Guangdong Province, P. R. China. I've had this in pretty much daily use for 2 months now. Read the following before any operation to insure your safety and to keep the best condition for the KA3000 & KA6000 series. LED light help needed (booster? Reviewed in the United States on April 29, 2014. HlVMT7_a$dWM %
\~mGUg. Modify the display board to change the OCP and OVP LEDs to RGB. Disabling it will result in some disabled or missing features. So it might help if the voltage divider is not relatively high impedance. 180kHz-es zajsv az egyenes vonal. See if there are any active components on this path, check resistors and check if the U10 input gets a stable DC voltage (probably varying between 0-5 V or so, scaling linearly with the output signal). I looked at a lot of supplies and bought this one based on the reviews. tranzisztoros darab,bkebeli. Three dual op-amps is plenty for a linear bench supply with an analog regulation loop. This usually is less than a diode drop, but for an accurate voltage one should still have a low resitance connection if the sense inputs are not used. The display drive resistors seem undersized for what the shift register can source. . High quality, feature-rich supply for a great price, Reviewed in the United States on April 18, 2018. dv! Esetleg, ha valakinek van egy eredeti fotja a gprl, hogy hogyan nzett ki teljes harci dszben, azt is nagyon megksznnm. License, Capacitor, Ceramic, 22uF, 25V, 10%, X7R, 0805, 4-Digit 7-Segment LED Display, Red, Common Cathode, TH, 0.40", Low Dropout Linear Regulator, AZ1117-3.3, SOT-223, R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16. There are supplies with even more capacitance at the output, that are still considered good. Thanks Kleinstein - your input to this project has been really helpful! C.C is constant current indicator. It could be there just so the MCU knows to shut everything down in an over-temperature situation. Details Select delivery location In Stock Qty: 1 RND 320-KA3305P are multiple-channel digital control and programmable power supplies, which reflect a variety of features about digital control, such as the fast recall, and the parameters seng of Overcurrent Protection and Overvoltage Protection independently to provide the convenient and reliable operation environment. Ok sorry, didn't know what level of beginner you where. 10 min) use, e.g. This chapter contains important safety instructions that you must follow when operating the KA3000 & KA6000 series and when keeping it in storage. Valsznleg itt is ez a gond.Az egyik vgtrany/fet?/ munkaellenllsa
Azt azrt tudom, hogy ezt j nagy puffer kondival nem fogom kisimtani. The original 3 A are OK for short time (e.g. -http://alii.pub/61d78f, 30 5 (30 5). Top subscription boxes right to your door, 1996-2023, Amazon.com, Inc. or its affiliates. Viszont durvn zajos lett a szkp jelkpe. The electrical noise level of this model is about the same as the room environment (about 1mV P-P) as seen in the photos. In addition to the lower ripple of a linear power supply, the separate output switch, and a relatively small footprint, the Korad KA3005P is a programmable device. It can replace an original K002_V3.x board. In addition to the lower ripple of a linear power supply, the separate output switch, and a relatively small footprint, the Korad KA3005P is a programmable device. KA3005P - 0 ~ 30VDC Output Bench (AC to DC) Power Supply LED 0 ~ 5A Output Features Adjustable or Fixed Selection Switch, Programmable, Regulated, RS-232, USB Interface from SRA Soldering Products. relay? The voltage and current displayed on the readout is very accurate. Korad Ka3005p Display-Board. A Free & Open Forum For Electronics Enthusiasts & Professionals, Login with username, password and session length. Az albb linkelt topikban mr volt sz errl a szkprl:
I measured the C-E voltages at both gates of the darlington array (ULN2003) which are concerned with the relays: I measured the voltages between the driver IC's pins going to the relays and the ground pin of the driver. Before deciding on the software, one should have a better picture on the actual hardware to control. The Korad KA3005P power supply comes with the following accessories: User manual; Power cord; USB-cable (USB-A to USB-B) Downloads. ), Zonal E/E will transform automotive architectures, Linux-capable applications processor family targets edge applications. Apart from one concern (below) I'm quite pleased with it. KORAD KD3005P - Programmable Precision Variable Adjustable 30V, 5A DC KORAD KD3005P - Programmable Precision Variable Adjustable 30V, 5A DC Linear Power Supply Digital Regulated Lab Grade, Learn more how customers reviews work on Amazon. Very happy with the performance and apparent quality of this 5A linear power supply. com. :redsad:
So they avoid changing things if the old one is ok and not oscillating. , KORAD KA3005P VELLEMAN LABPS3005D POWER SUPPLY schematic.PDF, You can also download this and other files by, Panasonic NV-A5A NV-A5EN Service Manual, Schematic and other, JBL Xtreme 2 (S/N Starting from GG) Schematic, Service Manual V1.3, !!! that had a similar issue. Here's an example replacement driver I just did, here you would normally have say ~1.2 V, https://www.eevblog.com/forum/repair/korad-ka3005p-power-supply-calibration/30/, https://www.eevblog.com/forum/repair/korad-ka3005p-power-supply-calibration/?action=dlattach;attach=77401, https://www.eevblog.com/forum/repair/korad-ka3005p-power-supply-calibration/?action=dlattach;attach=77402, Quote from: Andy Watson on 16 Aug, 2015 23:17, Quote from: Kevin.D on 16 Aug, 2015 23:50, Quote from: Kevin.D on 22 Aug, 2015 17:59, Quote from: Kevin.D on 22 Aug, 2015 18:15, Quote from: Kevin.D on 22 Aug, 2015 22:29, Powered by SMFPacks Advanced Attachments Uploader Mod. Posts: 12690 Country: Re: Korad KA3005P power supply faulty/repair Reply #101 on: January 10, 2017, 01:46:49 pm Having something like 330 F at the output of a lab power supply is about normal. KORAD KA3010P -Precision Variable Adjustable 30V, 10A DC Linear Power Supply Digital Regulated Lab Grade byKORAD Style: KA Series - 10 Amp ProgChange Write a review How customer reviews and ratings work There should be sufficient load not to drive the supply to high anyway. Download File name KA3305P programming software - V4.0.zip amount of downloads 202 preview File name KEL103 Programming Software - V4.1 amount of downloads 327 File name KA6003P programming software V7.0.zip amount of downloads 74 File name KA6002P programming software V7.0 Top Quality Power Supply Manufacturer in China, Re: Korad KA3005P power supply calibration, Quote from: cavlovic on October 20, 2013, 05:13:03 pm, Profile->[Modify Profile]Buddies/Ignore List->Edit Ignore List, Quote from: Bored@Work on October 20, 2013, 05:56:53 pm, Quote from: iloveelectronics on October 20, 2013, 05:40:48 pm, Quote from: cavlovic on October 21, 2013, 05:40:26 pm, Quote from: mcinque on October 21, 2013, 06:49:23 pm, Quote from: cavlovic on October 22, 2013, 04:11:05 pm, Quote from: alm on October 22, 2013, 04:57:58 pm, this may have been the post I was thinking about, Quote from: mos6502 on October 23, 2013, 12:05:03 am, Quote from: mos6502 on October 22, 2013, 11:38:03 pm, Re: Korad KA3005P power supply faulty/calibration, Quote from: alm on October 23, 2013, 04:44:01 pm, Quote from: KORAD TECHNOLOGY on October 25, 2013, 04:04:49 am, Powered by SMFPacks Advanced Attachments Uploader Mod. "soft start", or specialized battery charger, or or or ), One could add an output relay, or maybe even an MOSFET as an output switch. Well, I reached a crucial point with my firmware for my KA3005: The basic functionality (and everything needed for this) is working!!! E jszg a sajtom.Kb kt hete hasznltam, veszem el aztn elbb az
The cables are laced (always a good sign of care being taken), the transformer is huge and the heat sinking looks good.
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To calculate the overall star rating and percentage breakdown by star, we dont use a simple average. As I mentioned, I am a beginner when it comes to this kind of troubleshooting. Is there another PCB in there with opamps? Hell ! This is a good supply if you need tight voltage control at substantial amperage with a current-limiting feature. P >#a1AX
&P{3 -hh 3T07x)(_^J0.3:K3 I measured the input to the driver from the microcontroller vs ground for both relays. Confirm the main transformer taps and tap switching relay's are working. Reviewed in the United States on May 18, 2022. Leglbb a ptlsok hitelesek lehetnnek klsleg is. Sort out OVP and OCP. Korad Ka3005p Display-board - View presentation slides online. hb```,,@
(go8x Ag=1nyc``Y0@q,Ur9%4L.HuH-trPwBZj WlW8CD& However there is a possibility to add some circuitry to prevent this to make the cross over faster. talaktottam, mgpedig gy, hogy tvgtam a stabil kockk kimeneti lbait, s bektttem a DC-DC konverter kimeneteit (a kt +5V-os g prhuzamostva). In most circuits I have seen so fat the diode D3 is on the other side of the shunt. Korad KA3005P Labornetzteil Programmierbares Labornetzteil, 1 Kanal (30V/5A), 150W, 10mV/1mA Auflsung, USB/RS232-Schnittstelle Variante 109 KA3005P (Schraubklemmen) 119 KA3005P+ (Schraubklemmen) 119 KA3005P+ (Sicherheitsbuchsen) 119 KA3005P+ (US) ab 109,00 inkl. 5 out of 7 are shorted. There can also be an additional diode (usually just 1, but high current ! if there is kind of slow acting / temperature sensing protection. There are supplies with even more capacitance at the output, that are still considered good. Szeretnm ptolni. Looking for similar korad manual? I would expect that to kill the pass transistor or its driving circuit, not the voltage monitoring however. Only one of them toggled from 0 to 3V. You were absolutely right and thank you very much for the inputs !!! It came with a standard mains cable with US plug, a set of test leads (banana plug to crocodile clip) which are pretty cheap but usable, a USB cable, small instruction booklet and a DVD with the Windows software (and a PDF with the commands to program it via the serial port). I guess lessons learned here is that if you even design a power supply, make sure it is is safe even *if* your MCU outputs "please emit smoke" combination, Quote from: pomonabill221 on 10 Jan, 2017 23:36, Quote from: mos6502 on 10 Jan, 2017 07:36, Quote from: Tony Mach on 03 Aug, 2017 13:57, Quote from: rufusalceste on 16 Oct, 2017 13:23, https://www.eevblog.com/forum/repair/korad-ka3005p-power-supply-calibration/msg370823/#msg370823, Powered by SMFPacks Advanced Attachments Uploader Mod, This works on my KA3005 - other hardware revisions may have critical differences (There is much strangeness in the schematic), AFAIK one can not read out the original firmware - so once you overwrite the original firmware you can not go back, There is no calibration routine, the calibration values are hardcoded, CooCox and the debugger are strange Relays sometimes switch when you load new firmware this contributed to me having once shot the power transistors, I make mistakes (I once reached a peak value late at night of 2 bugs per 1 line of code) this also contributed to the aforementioned incident where I shot the power transistors, Memory is not implemented (M1 to M5 not done), The interface to USB/serial is not implemented (my PSU model is without the interface board, and one would need to reverse-engineer the protocol, so this maybe will never happen), The LEDs flicker under certain conditions (I know how to fix that, but haven't had the time to do it), Haven't fully figured out the temperature-ADC yet, Fan is switched on with the output, and runs aways with full speed while output is on, IMHO the adjustment of voltage and of the current is nicer in my firmware (and I might improve it even further by a little bit), Considering the power rating of the transformer, and of the transistors, I think it could be possible in future to "overdrive" the PSU and output more voltage, or possibly even more current, under certain circumstances (if one stays within the ratings of those components), One could implement custom behaviour (e.g. 0 Members and 1 Guest are viewing this topic. due to transistor -leakage). The Korad KA3005P is a 1-channel programmable power supply (0-30V/0-5A) with both USB/serial and RS232 connectivity. Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them. Though usually the user is responsible for using low inductance (e.g twisted) wiring. Slightly higher noise, but no voltage setting resistors needed, and will do the job, Diode isolating of the 24v supply used for the +6/-6v analog rails, to stop that dropping under the main load, A seperate LC filter on the part of the 5v rail used for the analog section, to cut out digital noise, Ferrite beads on the power supply of ADC and DAC, 100R series resistors on the SPI lines, to prevent ground bounce between digital and analog sections, Various pin swaps on the STM32 to aid with routing. I loved my old supply, because I designed and built it, but mine was crude and didn't have any sort of display. The $30-$50 units seemed too cheap and the reviews certainly reflect that. A belltsoktl fggetlenl egy kb. Welcome to DONGGUAN KORAD TECHNOLOGY CO., LTD. AddF9, Building D2, Kechuang Center, Songshan Lake Intelligent Valley, No. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. The main part could very well be interfacing the LCD output. A Reversible Mod To The Korad Ka3005p Power Supply Supply To Have A Nice And Quiet Please make sure that you are posting in the form of a question. -`oQ"S(`Ls$$.5!!d3b]@wak#]Xxqv,"wIe{4p7W, ]
Hi . Below you'll find the bill of materials for this board. $;ml#|{n: y pd/0-
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5$``\3QiLY9fmKB\;s0U Many power supplies get really unhappy when they have to sink current. And the NPN symbols are upside-down. Mode 2: adjust directlu, no need to pust the knobs. Share: Facebook Twitter More Loading. I can't compare the over-current protection speed to other supplies, but seems fine for my uses. Tancsot krek, hogyan lehetne kisimtani a tpot. I was impressed with the assembly. hideg,de a tranzisztorok jk,megcserltem ket.Ez mg a teljesen
The photos show turn-on, turn-off, and over-current shutdown, 3v into 10 ohms. Except for the one going to the working relay and one more. Are you sure you want to create this branch? H\j0 b!x,P`KPBvxB Add isolated USB interface (for calibration and control), Add 5v power output on rear (USB A socket). IMHO the 100ms transient response (no opamp is THAT slow) and the steps in the voltage after turn-on (watch Dave's video) speak a clear language. A 100 Ohm resistor usually does not introduce a significant error, as the sense line is usually still low impedance (e.g. Having something like 330 F at the output of a lab power supply is about normal. A mrcscsok s a snt (?) The description somewhat sounds like a problem with transformer tap switching. When I added up these features/advantages and the price, it . This connector is empty in the D-model ( no connector plugged ), while in the P-model there is a 4 pin wire to the USB board on the back of the unit. The board has a speaker, why not have the hardware to use it properly? %PDF-1.6
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Van egy fluke pm3370 kombiszkpom.A menben van egy olyan rsz ami kdot kr a belpshez.Nem tudja vletlenl valaki,hogy mi lehet ez a szm? It worked all well. E-mail krissy@koradtechnology.com Add F9, Building D2, Kechuang . Igazbl az a krds: van-e valamilyen univerzlisan hasznlhat L-C ramkr, vagy krelni kne valamilyen svszrt hozz?
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