51 single-chip microcomputer control four tiles series LED, I came up with two solutions, everyone to see, if there are problems at points out, thank you

CodePudding user response:

Suggest that the second scheme, the security, large driving force,

CodePudding user response:

Beginners at the egg chicken the common fault of the circuit design, two solutions are poor,

CodePudding user response:

To join http://www.51hei.com/bbs/dpj-167957-1.html

CodePudding user response:

First scheme may couldn't keep up with SCM supply current, the led brightness is affected, the second solution to the power converter documentary tractor feet after a triode isolation, drive current is large, single chip processor just destroy the led light is good, so the second solution is better

CodePudding user response:

The first is not working with the second

CodePudding user response:

Two schemes have problems
Plan 1 is not possible, one can't help, in the high level state, the current reverses irrigation (using open leak can control lived in theory, but IO foot inside and is the reverse protection diode power supply when output is shut off, the current reverse diode into the positive conduction)