User Manual

6
Buzzer
A buzzer produce a signalling sound to alert for
a dangerous situation, timer conrmation, a
button is pressed, ... The pitch of the buzzer
can't be changed because the frequency of the
oscillator is xed. (Velleman part# SV3)
Push button
A push button will conduct current
when pushed and interrupt the cur-
rent when released.
(Velleman part# D6)
Inside connection
The supplied button has
4 connections, but only
2 are used.
2 are interconnected.