CN207852008U - A kind of novel touch formula voice warning circuit - Google Patents

Abstract

A kind of novel touch formula voice warning circuit, including power circuit, bridge-type resistance circuit, amplifier, delay chip, voice module five are most of；Power circuit selects YS U5S5 Switching Power Supplies, bridge-type resistance circuit is connected and composed by the dry cell of three 5M Ω resistance R1, R2, R3, two touch electrodes S1, S2 and two section 1.5V, amplifier selects Risym AD620 modules, delay chip selects the new C005 chips in east, voice module to select YS M3 modules；Circuit structure is simple, and performance is stablized, easy to implement, the trigger circuit especially suitable for children intelligent developmenting toy and other types of touch type Alarm.

Description

A kind of novel touch formula voice warning circuit

Technical field

The utility model is related to a kind of sound circuits, especially using human contact as the voice warning circuit of trigger signal.

Background technology

Traditional mechanical switch circuit volume is larger, and flexibility is relatively poor.It is tactile that touch circuit, which is with human contact, It signals, service life is long, beautiful and compact, has more be widely applied in daily life.

Invention content

The utility model is intended to design a kind of of simple structure and strong practicability, and voice can be carried out after human body touch The circuit of prompt.

The technical solution of the utility model is：A kind of novel touch formula voice warning circuit, the electricity routing power, bridge-type electricity Resistance circuit, amplifier, delay chip, voice module five are most of to be constituted.Power circuit selects YS-U5S5 Switching Power Supplies, is used for By 220V AC rectifications at 5V/1A direct currents；Bridge-type resistance circuit by three resistance values be 5M Ω resistance R1, R2 and R3, two The dry cell of touch electrode S1, S2 and two section 1.5V connect and compose；Amplifier selects Risym AD620 modules；Delay chip selects With eastern new C005 chips；Voice module selects YS-M3 modules.Wherein, two section dry cells are composed in series 3V DC power supplies, and power supply is just Pole is connect after resistance R1 and R2 with power cathode；3V DC power anodes are connected by resistance R3 with touch electrode S1, are touched Electrode S2 is touched to connect with power cathode；Bridge circuit vertex a and b is connect with the ends S+ and S- of Risym AD620 respectively；YS- The 5V output voltage anodes of U5S5 are connected on the ends VCC at the ends Vin of Risym AD620, the ends VCC of C005 and YS-M3, simultaneously The IN triggering ends of the OUT output ends access C005 of Risym AD620, the ends GND ground connection；The ends GND of C005 are grounded, and pin 5 passes through Time adjustment resistance RT is connect with pin 6, and OUT output ends access the ends A1 of YS-M3；The ends GND of YS-M3 are grounded, sp1 and sp2 Pin accesses the loud speaker of 4 Ω 3w of TELESKY.

The utility model has the advantage of：Circuit structure is simple, and performance is stablized, easy to implement, especially suitable for children's intelligence Power develops the trigger circuit of toy and other types of touch type Alarm.

Description of the drawings

Fig. 1 is a kind of circuit diagram of novel touch formula voice warning circuit.

Specific implementation mode

After circuit accesses power supply, as the non-touching electrode S1 and S2 of human body, it is transferred to Risym AD620's by bridge circuit The ends S+ are about 3V, and the ends S- of Risym AD620 are about 1.5V, and the output of Risym AD620 at this time is high level；And human body and electricity When S1 and the S2 contact of pole, the ends S- that Risym AD620 are transferred to by bridge circuit are about 1.5V, since Human skin resistance is about 1.5M Ω, resistance value are less than 5M Ω, and the ends S+ that Risym AD620 are transferred to after partial pressure are less than 1.5V, at this time Risym AD620 Output end becomes low level, generates failing edge.When C005 delay chips detect the failing edge, one is generated in its output end Duration is the low level signal of 5-6s clocks, the ends A1 of YS-M3 is transferred to, when YS-M3 modules detect the low level signal When, the First song in the loud speaker broadcasting SD card that it is connected is controlled, prompt is thus played the role of.

Claims (1)

1. a kind of novel touch formula voice warning circuit, it is characterised in that：Including power circuit, bridge-type resistance circuit, amplification Device, delay chip, voice module five are most of；Power circuit selects YS-U5S5 Switching Power Supplies, and bridge-type resistance circuit is by three 5M The dry cell that Ω resistance R1, R2, R3, two touch electrodes S1, S2 and two save 1.5V connects and composes, and amplifier selects Risym AD620 modules, delay chip select the new C005 chips in east, voice module to select YS-M3 modules；Two section dry cells are composed in series 3V DC power supply, positive pole are connect after resistance R1 and R2 with power cathode；3V DC power anodes are by resistance R3 and touch Electrode S1 connections are touched, touch electrode S2 is connect with power cathode；Bridge circuit vertex a and b respectively with the S+ of Risym AD620 and The ends S- connect；The 5V output voltage anodes of YS-U5S5 are connected on the ends Vin of Risym AD620, the ends VCC of C005 and YS-M3's The ends VCC, while the IN triggering ends of the OUT output ends access C005 of Risym AD620, the ends GND ground connection；The ends GND of C005 are grounded, Pin 5 is connect by time adjustment resistance RT with pin 6, and OUT output ends access the ends A1 of YS-M3；The ends GND of YS-M3 are grounded, Sp1 and sp2 pins access the loud speaker of 4 Ω 3w of TELESKY.