Publicité
191. Logic element "3 AND" with sound
Assemble the circuit. In order for the sounds of the siren to be heard from the speaker, both reed
13
and button 14, and switch
1B
switch
need to be pressed simultaneously. The logic element
„3 AND" works according to this principle.
192. Logic element "3 AND" with light
Replace speaker
20
with LED
17
("plus" above – see circuit). The LED will light up only when
all three switches 13, 14,
15
are closed simultaneously.
118
193. Logic element "3 OR" with sound
Assemble the circuit. When closing EITHER reed switch 13, OR button 14, OR switch 1B, the
siren will sound. The logic element "3 AND" works according to this principle.
194. Logic element "3 OR" with light
30
17
("plus" above – see circuit). Now, when any of the switches 3,
Replace speaker
with LED
14
or
15
are closed, the LED will light up.
119
Publicité
