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  1. The key part of any electronic device is the power supply. Any instability or malfunction of the power supply part causes the device to stop working or demonstrate weird behavior. In this article/video, I introduced an AC-to-DC flyback Switching power supply that converts 85V-260VAC to 5VDC-2.5A, which can be used in various applications. The 5V selection for the output makes it friendly for linear regulators that convert 5VDC to lower voltages. The maximum power delivery of this power supply is around 12W, which means it can handle 2.5A at 5V output. The controller chip is DK1203, which does not need any external supply, a startup resistor, or an auxiliary winding on the transformer. The ferrite core of the transformer is EE20. A potentiometer allows you to adjust the output voltage and set it exactly at 5.0V. To design the schematic and PCB, I used Altium Designer 23 and shared the PCB project with my friends for feedback and updates using Altium-365. The fast component search engine, Octopart, proved invaluable in quickly obtaining component information and generating the Bill of Materials (BOM). To ensure high-quality fabricated boards, I sent the Gerber files to PCBWay. I tested the board for voltage drop, current delivery, and output noise. I used Siglent SDL1020X-E DC Load and Siglent SDS2102X Plus oscilloscope to perform all tests. I am confident that building this circuit enhances your knowledge regarding switching power supply design, except for using it for real applications. Schematic + PCB + Transformer: https://www.pcbway.com/blog/technology/85V_260VAC_to_5VDC_2_5A_Flyback_Switching_Power_Supply_b7f49beb.html References [1]: DK1203: https://grupoautcomp.com.br/wp-content/uploads/2016/11/Specification-IC-DK1203.pdf [2]: 500mA Fuse: https://octopart.com/39211000440-littelfuse-39590771?r=sp [3]: 07D471 Varistor: https://octopart.com/mov-07d471ktr-bourns-19184728?r=sp [4]: 100nF X2: https://octopart.com/r463i310050m1k-kemet-50550056?r=sp [5]: UU9.8 Choke: https://octopart.com/7355-h-rc-bourns-12614152?r=sp [6]: MB6M Bridge: https://octopart.com/mb6m-e3%2F45-vishay-42761003?r=sp [7]: 22uF-400V: https://octopart.com/eca2ghg220-panasonic-3578224?r=sp [8]: RS1M Diode: https://octopart.com/rs1m-13-f-diodes+inc.-333072?r=sp [9]: PC817 Optocoupler: https://octopart.com/pc817xnnsz1b-sharp-80823687?r=sp [10]: TL431 Shunt: https://octopart.com/tl431acdbvr-texas+instruments-521839?r=sp [11]: SS54 Schottky Diode: https://octopart.com/ss54-multicomp-18903925?r=sp [12]: 470R-1206: https://octopart.com/cr1206-jw-471elf-bourns-3872844?r=sp
  2. As informed by Rubycon, production of materials used in aluminum electrolytic capacitors has been discontinued Stopped in ongoing production due to transaction volume and difficulty drop. Therefore, we will also stop production of aluminum electrolytic capacitors below Φ8. We at Sun Life have a high quality alternative to the Rubycon line of products. The following small diameter series products of YMIN can completely replace the series products of Rubycon. Type Series Life(Hrs) features Rated Voltage Range(V.DC) Rated capacitance(uF) working temperature (°C) Chip Type V4M 1000 3.95mmLMAX, ultra-small products 6.3~100 1~220 -55~105 Chip Type V3MC 2000 Ultra-high capacity, low impedance, small product 6.3~35 220~2700 -55~105 Chip Type V3M 2000~5000 Low-impedance, thin, high-capacity products 6.3~160 10~2200 -55~105 Chip Type VMM 3000~8000 5mm high, thin product 6.3~500 0.47~4700 -55~105 Chip Type VK7 4000~6000 7mm high, small product 6.3~400 1~680 -55~105 Chip Type VKO 6000~8000 Small size 10~500 0.47~10000 -55~105 Chip Type VKM 7000~10000 Long life, miniaturized product 10~500 0.47~4700 -55~105 Chip Type VKG 8000~12000 long life 10~500 0.47~4700 -55~105 Chip Type VKL 2000~5000 High temperature resistance, long life 10~450 0.47~4700 -40~125 Chip Type VKL(R) 2000 High temperature resistance, low impedance, high reliability 10~50 47~3300 -55~135
  3. If you are looking electrical components for any of your projects. Please contact http://www.win-source.net/ at WIN SOURCE they offer Hot-Sales and EOL inventory, Ships in 24 hours, 365 days Warranty, 500,000 In Stock SKUs. WIN SOURCE is the first and the only cross-border platform concentrating on selling Hot-Sales and EOL (end-of-life) electronic components. Contact them today and get the best. They are the number one Online Electronics Store and Electronic Components Distributor in the world. Buy Electrical Components from them today.
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