3Pcs DIY Touch Vibration Alarm Kit Electronic Training Teaching
$11.65
Shipping:Standard Shipping about 10-25 business days
Secure Payment:Paypal,VISA,MasterCard
Working principle
The touching vibration alarm consists of touch trigger circuit, vibration trigger circuit and alarm circuit. The 555 time base circuit U1 forms the typical monostable operating mode. The transient time is determined by the values of RP1, R2 and C2.
Usually the circuit is in steady state, 555 time base circuit 3 pin output low, the alarm chip does not alarm because there is no power supply. When the human touch the electrode sheet M, the human body induced by the clutter of the signal injected into the 555 trigger pin 2 through C1, or vibration sensor S1 connect instantly because of the vibration, will both cause the U1’s pin 2 to appear instantly low level , So that the 555 circuit flip into the transient, pin 3 mutate to high level, alarm chip works.
Transient time is over, the time base circuit back to steady state, stop the alarm. The length of the alarm time can be adjusted by changing RP1. LED is a two-color light-emitting diodes, green LED bright after power, use as the power indicator light, the red and green light are bright and shows the overall orange when alarming, the resistance of resistor R5 determines the alarm sound play speed, generally take 180K-240K, pay attention to install the resistor before installing the chip, the entire circuit can work under DC 3-6V.
Note
Battery is not included.
Package included
3 x DIY Touch Vibration Alarm Kit
Weight | 0.039 kg |
---|
Customers Also Viewed
20Pcs Serial Port WIFI ESP8266 Module Adapter Plate with IO Lead Out for ESP-07 ESP-08 ESP-12
$12.02Smart ModuleAdd to cart20Pcs Serial Port WIFI ESP8266 Module Adapter Plate With IO Lead Out For ESP-07 ESP-08 ESP-12This Adapter Plate is for ESP-07 ESP-08 ESP-12, a test board with IO lead out.NoteNeed to solder 3V regulator by youself.ESP-07, ESP-08, ESP-12 module board are not included!!!Package included20 x Serial Port WIFI ESP8266 Module Adapter Plate40 x Pins
20pcs 5V Low Level Trigger one 1 Channel Relay Module interface Board Shield DC AC 220V
$35.99Relay ModuleAdd to cartFeaturesWith isolation groove in control area and load area.With power and relay action indication, bright when connect and go off when disconnects.When there is a signal in signal input, public side and common side will breakover.It can be not only used as a microcontroller development board module, but also as a home appliance control.It can …
20pcs 5V Low Level Trigger one 1 Channel Relay Module interface Board Shield DC AC 220VRead More
10pcs DC 3V Watering Small Water Pump Silent Mini Water Pump
$26.77Other Module BoardAdd to cartFeatureAmbient temperature:-20 ° C ~ 60 ° CUse ambient humidityUse medium:water, non-flammable fluid liquidUse scene:medical, fountain, etc.Life:>=200H (continuous work)Motor model:140 type 5500RPM/MINModel:Voltage Scope (DC):Current (A):Power (W):Max. Water Head (M):Max. Flow Rate (L/H):Starting Voltage:Waterproof GradeJT-DC3W-3:3V:0.12:0.36:0.35:80:1:IP68Package includes10 x Water Pump
3Pcs I2C WiiChuck Nunchuck Small Adapter Shield Module Board
$6.63Sensor & Detector ModuleAdd to cartSpecificationWiichuck is a board for Wii-Nunchuck.Use this shield to achieve communication between nunchuck with for without broking the controller for Wii Nunchuck.It is grate for DIY projects.Dimensions:1.02 in x 0.47 in x 0.28 in (2.6 cm x 1.2 cm x 0.7 cm)Package includes3 x Adapter Module
5Pcs YS-U12S5H AC to DC 5V 2A Switching Power Supply Module AC to DC Converter 10W Regulated Power Supply
$37.17Power Supply ModuleAdd to cart>>>Manual:Click here to openFeatures-Universal voltage input:AC100-265V AC-With overload, short circuit, over temperature protection function-Full load aging test-Ultra low output rippleSpecificationsModel:YS-U12S5HOutput characteristics:Output voltage:5VRated current:2000mACurrent range:0-2000mARippleOutput accuracy:÷1%Voltage regulation rate:÷1%Load regulation rate:÷1%Rated power:10WAdjustable output range:/Setup, rise, hold time:300ms、20ms、20ms/220VACInput characteristics:Input voltage range:AC100-264VInput currentFrequency range:47Hz-63HzEffectiveness:>83.5%Start impact circuit:COLD STARTLeakage currentProtection characteristics:Over power protection:150-170% rated power, automatic recovery after fault removalOver voltage …
CBB60 5Pcs 50UF 450V Water Pump Motor Run Capacitor
$64.03Module ComponentsAdd to cartFeaturesCBB60 Capacitors takes heavy-edge metallized Al/Zn PP film or web-like fuse film as dielectric. Its components are sealed with flame-retardant epoxy resin. It has cylindric outline with high reliability and stability.CBB60 capacitor has features of small size, light weight, small tangent in waste angle, and good self-concrescence. Applicable to startand operation with 50/60Hz. A. C …
CBB60 5Pcs 50UF 450V Water Pump Motor Run CapacitorRead More
20pcs ZFX-W1302 Digital thermostat Controller Temperature Controlling Temperature Meter for Automatic incubator
$172.94Test & Measuring ModuleAdd to cartSize ConversionInchesCentimetersPlease according to your own measurements to choose your suitable size. The tags inside the items will show in our Asian (Type) size.SpecificationsModel:ZFX-W1302Material:PVCPower Supply:DC 9-24VTemperature Measurement:-50 C – 120 CTemperature Control:0 C – 110 CTemperature Control:0.1 CDisplay Color:RedSensor:NTC B3435 10KSensor Cable Length:1MSize:99 * 43 * 22.6mmSetting Steps1. Short press the ‘Set’ key, the screen …
Reviews
There are no reviews yet.