![]() ![]() ![]() The parts like NPN, optocoupler and POT values are not critical. This current limit can be totally disabled by setting the wiper to the fully clockwise(i.e. It is advisable to make sure the wiper is at the NPN emitter position before testing the circuit. In the schematic below, the current signal from edge connector pin#34 is fed to an emitter follower made up of NPN 2N3904, with the 470R trim POT as load. I rigged up the few parts needed and tried it on my supply. However, will it actually works? Well one won't know if one don't try. The control circuit will then works to reduce the power supply output voltage as a result. By reducing the value of the top element, you can mimic an increase in output voltage as the sampled voltage is now larger. However, you can also do the same with the top element too. You've already known how to change the sampled voltage by changing the value of the bottom resistor element. Simply put, the power supply output voltage is sampled via a voltage divider, consists of a top and bottom resistor in series. Actually you've have got a very good idea and it might work, it just need a little twist in your thinking. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |