Search results

  1. M

    0-30 Vdc Stabilized Power Supply

    About C4, R8 and R9 forget it.... my bad, R9 only takes down a bit amplitude of ripple voltage at low frequencies (something like to 10Hz). So I still don't understand R9 fuction.... I remeber that audioguru said that it isolates D9... does it mean that for D9  R9 seems to be source?
  2. M

    Convert 0-30V 3A PSU to 5A or more

    Ok I have read through all postings in this 3A to 5A list and I don't recall that there were list of components, what you need to change compared modified 3A project. Maybe I have been up too late too many nights, but can anyone help me with this problem. I going to get over first with 3A...
  3. M

    0-30 Vdc Stabilized Power Supply

    A small thing that I've noticed... I simulated C4, R8 and R9 and only R8 and C4... and thing is that with R9 isn't it 3 order LPF (as without it it's 2 order LPF)? The thing is with with R9 it cut's harder frequencies, then without R9..... it's just a remark...btw at 100Hz it drops ripple...
  4. M

    0-30 Vdc Stabilized Power Supply

    A silly question: in wich frequency is low pass filter (R8, R9 and C4) calculated on? I mean does it block from 100Hz to ...?
  5. M

    0-30 Vdc Stabilized Power Supply

    At first I'm quite newbie in electronics and  me and my firend decided to make our course project about this power supply. And there is needed some analysis and calculations. So in schematic is C4, R8 and R9 ... why are these needed? I understand why C5 is nessesery, but isn't better to use a...
Top