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  1. Here is another forum topic discussing this power supply. (in Russian) http://forum.cxem.net/index.php?/topic/209045-бп-на-tl081_0-30v-0002-3а-и-его-модификации/
  2. SeeedStudio is supporting the maker with this great offer! They will assemble your PCB (5 pieces) for free. You just need to purchase the parts and place the order online. More information: https://www.seeedstudio.com/free-assembly-for-5-pcbs.html
  3. Thanks for attaching the Gerber. Could you give us more information on the rating (votlage/current) of the heating element as well as why this is needed on 3D printers?
  4. I looked around for such a charger, but seems difficult to find a suitable circuit for such high current output. Let see if someone can come up with a schematic.
  5. take a look at these 3 phase motor controllers, http://www.electronics-lab.com/project/3-phase-ac-motor-controller/ http://www.electronics-lab.com/project/inteligent-power-module-ipm-board-brushless-motors/ What kind of motor is yours?
  6. Could you provide the design files or Gerber files, otherwise this is not usefull for the members of the community.
  7. Here is the project page: http://www.electronics-lab.com/project/power-supply-brushless-motor-drivers/ This board produces 400V output to power Brushless Servo Drivers, mainly IPM Modules. It is not able to drive the motor. For this purpose you will need a driver board. We can produce this board if order quantity is > 25 pieces. If this interests you, i can quote for that. An Arduino can be used to produce the control signals for the control board.
  8. This is the basic connection of BMS charger circuit. Do you need the scheme for the charger it self maybe?
  9. This power supply is also published on an old Czech electronic magazine attached here. and here is also two nice builds of this PSU: https://translate.google.com/translate?sl=auto&tl=en&u=paja-trb.cz%2Fkonstrukce%2Fzdroj.html and here: http://diyfan.blogspot.com/2012/02/adjustable-lab-power-supply.html 0-30V 3A PSU.pdf
  10. Hi there, These capacitors are filter ones and need to be placed in various spots on the board, near voltage inputs, outputs, IC power pins and other place, so they filter the noise on the Vcc line across the board, so that's why they are many and connected on main voltage. 1n5422 diodes (Schottky diode 40V 2A) are used to protect the ICs from reverse input voltage on their Vin pins, as they allow current to flow in one direction. You can use any Schottky diode with same characteristics. Welcome to our community, Mike
  11. This is a popular ESR meter across the web and we also have a revision of it published here: http://www.electronics-lab.com/project/advanced-lc-meter/ Regarding your questions on the first message, let's see if someone who has build it can help out.
  12. Can you point us to the most interesting ESR meter you've build?
  13. Hi Peter and welcome to the community. Could you share your thoughts building this LC meter and if everything worked right from the beginning.
  14. Hi and welcome to elab community Could you post a photo or diagram of what you are trying to do?
  15. I came across 2 builds of this power supply with lot's of info on the process and tuning of it. http://diyfan.blogspot.com/2012/02/adjustable-lab-power-supply.html http://www.paulvdiyblogs.net/2015/05/tuning-030v-dc-with-03a-psu-diy-kit.html Worth checking these websites.
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