Hi,
a lot of mistakes.
No GND plane.
No capacitors at XTAL
No fast ceramics capacitor at EACH IC power supply pin (solely C3 is placed well)
wrong signal flow from input to 7812 then capacitor: It should be: input-capacitor-7812 (to prevent voltage spikes to reach 7812 input)
No capacitor at node 7812_output to 7805_input (maybe this is the most critical problem)
(i doubt 7812 is needed at all)
I assume there are even more problems.
Klaus
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Hi,
With 24V input and ~5A of output, you are dropping 60W in that 7812, and a considerable amount in the 7805.
5A is LED current. But LED current doesn't flow through 7812 and 7805... only uC and wireless_module current.
Klaus
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My recommendation:
* first add the missing componentis in your schematic.
when schematic is finished...
* wire input + and - directely to a bulk capacitor. Short thick traces.
use those two capacitor connections as star point. This means use seperate traces for power path (thick, short) and seperate traces for control path.
even if there is the bulk capacitor, expect spikes.
therefore a series R in the + line to the control path is a good idea.
Not urgent, but personally I´d replace the 7812 with a couple of zeners.
I asumme your control path including wireless_module will mot consume more than 100mA.
If so, then use 1W zeners with less than 5V.
Then place a smaller bulk capacitor directely at the input of the first voltage regulator.
...then the next steps...
Klaus