The input seems like it is fused, if I think the glass component is in series with the main input.
The mains cap is 400v, 105 degrees C, is this a 120v or 230v unit - it should be safe in any case from blowing the cap. Any lightning strike would most likely blow it though, as surge protection is missing.
There is a common mode filter in place - it reduces emissions from the switching.
The clearance between primary and secondary seems ok, it is hard to judge distance/size from your pics.
The output diode is nice and big, so it can most likely stand the current you draw - what is the device ratings?
- there seems to be a little bit of output filtering as well. This is good.
There seems to be no short circuit protection, and the voltage is fixed - so I recommend getting a regular lab supply to power your new hobby projects.
What are you worried about, since you post -
?
(It is NOT safe if you encapsulate it completely in epoxy and draw lots of continuous power - it will overheat, but since you don't state anything about what you need it for, this is an example of you asking interesting questions, and me answering a hypothetical question. Since I don't know your intentions, it's almost impossible to answer you in full
)
Experience is experienced, learning is well.. getting
started
On a personal note, I wouldn't worry too much about it - if used on low power (rated) consumer electronic items.
BTW - there seems to be a broken/cut pcb trace near the top red wire in your pcb view!!!!!
Edit - Added: The mains wall input connection seems to be below the PCB as part of the enclosure. You need to take a picture/verify that there is enough clearance between the pins and the PCB, and the soldering job is done well enough, if you need my further advice.
A soldered wire onto a pin (wall outlet fixture) can/will loosen over time, and if it shorts to the secondary it is trouble! Mechanical fixture is of utmost importance, especially if used in a rugged environment.