Step 8 - Switches
A tact switch is type of switch that is only on when the button is pressed. As soon as you release the button, the circuit is broken.
These switches in this circuit are used to feed positive voltage to latch circuit or to ground that positive voltage, they are turning on or
off transistor which is then turning on or off relay module.
There are two tactile switches. Only one alignment will fit. They will pop into the board when you press on them.
Solder them into place. You will not need to snip the legs because they are short already.
Step 9 - Dip switch
A DIP switch is a manual electric switch that is packaged with others in a group in a standard dual in-line package (DIP). The term may
refer to each individual switch, or to the unit as a whole. This type of switch is designed to be used on a printed circuit board along with
other electronic components and is commonly used to customize the behavior of an electronic device for specific situations.
DIP switches are an alternative to jumper blocks. Their main advantages are that they are quicker to change and there are no parts to
lose.
Dip switch in this circuit is used to determine on which level water pump will turn off. One side of terminals are connected to outputs of
NOT gates before LEDs and other side is short circuited and connected with base of Q1 transistor. When one contact is turned on
switch will allow signal from not gate to turn on transistor which will ground latch circuit and water pump will be turned off.
Place dip switch on board, switch is designated as level_off on top silk picture. Little squares on dip switch symbol are showing contacts
in off position, on position is show on switch itself.
When you place switch on board you can secure it from moving with tape, after you solder it to board tape can be removed.
