Hi,
Long story short:
~16Vdc comes in [Either way]
- Part of this is fed to a bridge rectifier's AC input such that it outputs about the same V (but now always one way).
- This goes to a 7805 (there's a resistor in the +ve leg that's turned the shrink tubing brown! But I can't remember R)
- The 7805 has the "standard" heatsink *and* ~10sq" of aluminum sheet - This is "warm/hot". [Heat conductive goop was used during assembly btw.)
- There is *no* load on the 5v output ckt!
Anyone know why this thing is running so warm without a load?
Cheers,
Ian
Long story short:
~16Vdc comes in [Either way]
- Part of this is fed to a bridge rectifier's AC input such that it outputs about the same V (but now always one way).
- This goes to a 7805 (there's a resistor in the +ve leg that's turned the shrink tubing brown! But I can't remember R)
- The 7805 has the "standard" heatsink *and* ~10sq" of aluminum sheet - This is "warm/hot". [Heat conductive goop was used during assembly btw.)
- There is *no* load on the 5v output ckt!
Anyone know why this thing is running so warm without a load?
Cheers,
Ian