Since I keep seeing this come up.
They both work. The first one is easier to assemble on PCB and I trust it a lot more by virtue of high side switching
The second one is easy to build on protoboard, no need for a PCB.
Both have been tested by members of the community, I can cite their testimony if someone wants.
There could still possibly be issues, if someone makes these and encounters one, please let me know.’
BY THE WAY. The first switch will fail with an output capacitance greater than 6,000uF.
The second one may need tuning with the precharge resistors if the quiescent current is too high.
Both require a latching pushbutton, I recommend this one from adafruit:
Some smart antisparks are on the way in the near future.