Car wiper automatic controller circuit

Working principle of the circuit: As can be seen from the figure, the electronic clock alarm switch S. Connect between relay
K and the positive terminal of the 12 V power supply, disassemble the recorder , and remove the two wires on the "automatic shutdown switch"
(solder the two removed wires together). One end of S2 is connected to K,
and the other end is connected to the negative pole of the 12 V power supply. The power supply for the 50 W amplifier and recorder
is supplied by a set of normally open contacts of relay K. Transformer T is a 220 V/5 W power transformer with a secondary of 9V. It provides a 12 V power supply system
through VD, VD4 rectification and C filtering .
The night before, insert the tape into the tape recorder , press the "play
" button (close S2), and insert the signal cable into the corresponding jack of the amplifier.