SWITCH SOUND: schema and realization of electronics assembly
ACOUSTIC SWITCH SCHEME:
It is a device sensitive to sounds and noises, Receipts in a microphone capsule and drafts act on a relay.
It can be set in two different operating modes:
1) The relay is energized whenever it receives a sound and de-energizes when the sound stops. 2) The relay is energized when the capsule receives a sound and remains excited when the sound stops. To energize, you have another sound. It thus functions as a switch in itself. It is a device sensitive to sounds and noises. It can be pre-rule in two different modes of operation With the DV selector in position 1, the relay is energized when the capsule M receives a sound and de-energizes when the sound stops DV With the deflector in position 2, the relay s 'excite the capsule M recoil when a sound and the relay remains excited when the sound stops. To energize requires a different sound. It thus functions as a real interrupteur.La sensitivity is governed by acting on the trimmer Tl. The microphone capsule is connected to the circuit by a small armored cable, it is placed at a distance (minimum 15 to 20 cm) in a way not not pick up the vibrations of the relay. The supply voltage must be 12 Volt DC stabilized. At rest the consommalion is approximately 1 mA with relay excited she is about 45 mA.
For the completion of the installation, you must follow the atlenlivement components planting scheme.
LIST OF ELECTRONIC COMPONENTS:
All resistors are
of 1/4 watt unless stated
otherwise.
R = 6,8Kohms
R2 = 4.7 ohms
R3 = 39 ohms
R4 = 5.6 ohm
R5 = 470 ohms
R6 = 470 ohms
R7 = 100 Kohm
R8- 3.9 Kohm
TRl 2,2Mohms =
CI = 100 nFceramique.
C2 = 22uF16Velec.
C3 = 22uF16Velec.
C4 = luF16Velec.
D1-1N4148
D2 = 1N4148
Tl = 2N1711
IC 1 = LM324
IC2-4017
DV = Selector.
M = micro capsule.
RL1 Relay 12V =
1 Support pin 14.
1 Support 16 pin. Technical features: POWER: 12V DC CONSUMPTION MAX: 45mAMAX CURRENT CONT. RELAY: 2 Amperes