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  1. L

    0-30V Stabilized Power Supply

    The meters came from A Chinese seller on EBay. I don't have a record of the seller. These meters are commonly available on EBay , Amazon, AliExpress etc.
  2. L

    0-30V Stabilized Power Supply

    I finally have my power supply finished! It's on the shelf! I'm doing some full power tests. I Started with a pair of the Chinese circuit board kits.  Lucky that I found this thread. I made the mods to the boards and added higher power components and  PWM fan control. My transformers have...
  3. L

    0-30V Stabilized Power Supply

    Great job! I'd checked the positive supply and it's ripple was low. I forgot to check the negative supply. The negative supply has a lot of ripple. Now to troubleshoot that problem & get it fixed. Thanks a bunch!
  4. L

    0-30V Stabilized Power Supply

    I should have provided more information. I built the revised circuit that uses the TLE2141 op amps. Also, the noise only occurs when in constant current mode. It happens regardless of the voltage or current settings.  I put a 100 ohm load on it with the voltage set to 10V. (100mA load). As I...
  5. L

    0-30V Stabilized Power Supply

    I've built a power supply using this circuit. I noticed that it is noisy/oscillating when in constant current mode. When probing the circuit I see this oscillation on the current sense op-amp. Has anyone else seen this? Not a big problem for me as I'll probably only use CC to keep from letting...
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