+--------+
  +---+--100nF--1k--+--|>|--+--|LM2951-5|-+------+
  |   |             |       |  +--------+ |      |            +-- +5V
  |  910k         ZD12   47uF       |     |  +------+         |
  o   |             |       |   +---(-22k-+  |  AT  | PC817  |<
230V~ +-------------(-------(---+   |     |  | Tiny |-|>|-+   |E
  o   |             |       |   +---(-----(--|  15  |     |   +--
  |  22k            |       |       |   10uF +------+    1k  10k
  |   |             |       |       |     |      |        |   |
  +---+-------------+-------+-------+-----+------+--------+   +-- GND