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My problem is that I can't adjust the angle. When I adjust the angle, signal at output aurduino move but output at RL (fan motor) doesn't move as adjusted.
I don't know how to fix it.
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green is output RL(load Fan motor ). pink is signal zero crossing. yellow and blue is signal output pin 10,11 pre driver signal.

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  • \$\begingroup\$ Is the fan an AC motor or DC ? \$\endgroup\$ Commented Oct 24 at 10:45
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    \$\begingroup\$ The 2N6564 SCR appears to have a 300 volt rating yet the peaks of your sinewave are in excess of that. Do you know what that results in? What/where is component RL that you refer to? \$\endgroup\$ Commented Oct 24 at 12:16
  • \$\begingroup\$ Note that the "back" voltage of a fan can modify the behavior of the SCR. Why not use a TRIAC ? \$\endgroup\$ Commented Oct 24 at 12:22
  • \$\begingroup\$ ac fan. we use RL instead ac fan in circuits.picture2 is power circuit .in program proteus doesn't have any other scr with a higher voltage rating. \$\endgroup\$ Commented Oct 24 at 13:36
  • \$\begingroup\$ I using an scr because the project requirements specify the use of an scr only. \$\endgroup\$ Commented Oct 24 at 13:38

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You should have something like this ...

Simulated with microcap v12

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