10Pcs DIY Touch Vibration Alarm Kit Electronic Training Teaching
Shipping:Standard Shipping about 10-25 business days
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.
Battery is not included.
10 x DIY Touch Vibration Alarm Kit
Customers Also Viewed
12W 5.5V Tri-fold Foldable Waterproof Monocrystalline Silicon Solar Panel with 2Pcs Carabiner + USB Port$91.31Smart Robot & Solar PanelAdd to cart
Features1. Constructed by high quality material, eco-friendly, waterproof, durable and sensitive.2. Can be used for charging cellphones, mobile power bank, etc.3. Portable, foldable and lightweight, easy for carrying.4. Offers continuous power supply even on overcast day.5. Suitable for outdoor activities, emergency, and outdoor working.SpecificationsActual power:12W Solar energy output:5.5V, 2ASolar panel type:Monocrystalline silicon Conversion efficiency:21% Output …
12W 5.5V Tri-fold Foldable Waterproof Monocrystalline Silicon Solar Panel with 2Pcs Carabiner + USB PortRead More
Temperature and Humidity Control Module Switch Digital Display Dual Output Automatic Constant instrument Board with Sensor$39.15Sensor & Detector ModuleAdd to cart
>>>Manual:Click here to openFeatureProduct Name:Temperature and Humidity ControllerProduct model:XY-TR01Temperature range:-20 ° C ~ 60 ° CHumidity range:00%~l00%RHControl accuracy:0.1 °C 0.1% RHDetection probe:integrated sensorOutput type:relay outputOutput capacity:up to 10ANet weight:about 77g (including sensor)Appearance size:57 x 60 x 20mmProduct FeaturesProduct functions are mainly classified into two categories:temperature function and humidity function.Temperature Function1. Automatic recognition of working mode2. …
Temperature and Humidity Control Module Switch Digital Display Dual Output Automatic Constant instrument Board with SensorRead More
10pcs 1A 4.2V 3.7V Li-ion Li-Po Lithium Battery Multifunction Charger MPPT Solar Controller Module for Solar Panel Mobile Power USB SD05CRMA$39.29Other Module BoardAdd to cart
Descriptions– 3.7V 4.2V Li-ion Li-Po Lithium Battery Charger Module with automatic current limiting function – Power supply voltage DC 4.4-6V(DC 5V),Charging output voltage DC 4.2V; – The maximum charge current / output current is 1A, but you can change the current by changing the value of the R1 resistor. – Automatic charge current adjustment based …
10pcs 1A 4.2V 3.7V Li-ion Li-Po Lithium Battery Multifunction Charger MPPT Solar Controller Module for Solar Panel Mobile Power USB SD05CRMARead More
Automatic Irrigation Timer Controller LCD Display Watering Device for Family Garden Greenhouse Plants$60.74Electrical Relay & TimersAdd to cart
SpecificationsProduct Name:Timing Irrigation ControllerMaterial:ABSWeight:Approx.280gBattery:2*AA(Not Included)Working Water Pressure:Minimum:25psi; Maximum:100psiFeatures Fully automatic irrigation, multi-cycle setup, intelligent synchronization, large LCD display, large button update, large font clarity. A fully automatic smart watering device that can irrigate your flowers. It is completely waterproof and can be installed vertically outside to protect it from rain. The use of automatic irrigation …
Automatic Irrigation Timer Controller LCD Display Watering Device for Family Garden Greenhouse PlantsRead More
5Pcs 433MHz SW433-WT36 Gold-plated Small Elbow Bar Antenna Communication Antenna$24.79Module ComponentsAdd to cart
FeaturesSW433-WT36 small elbow bar antenna is a special antenna designed for 433MHz wireless data transmission/meter reading communication system. The antenna has good standing wave ratio, compact shape, ingenious structure, convenient installation, stable performance and good anti-vibration and aging ability.SpecificationFrequency range:433 MHz (+/-5)Standing wave ratioInput impedance:50Maximum power:10 WGain:2.5 dBiPolarization:Vertical PolarizationWeight:7gHeight:45mmLead-out cable:noneAntenna color:blackInterface Form:SMA-JWPackage included5 x Antenna
X9C103S Digital Potentiometer Board Module DC3V-5V for Arduino$6.88Driver ModuleAdd to cart
FeatureWide voltage (3V-5V) power supplyThe chip is X9C103SPCS size:2.7*1.3cm10K full range potentiometer.The central tap of the potentiometer slides 100 stages between 0 -10K(Typical impedance of the sliding end of the potentiometer is 40 ohms)The VL and VH ports of the digital potentiometer correspond to the low end and the sliding rheostat respectively High end, allow …
X9C103S Digital Potentiometer Board Module DC3V-5V for ArduinoRead More
with Shell Mini-Whip MF/HF/VHF SDR Antenna Miniwhip Shortwave Active Antenna for Ore V6N7$38.88Motherboard & Development BoardAdd to cart
DescriptionAccessory Type:USB To DC CableCompatible With:HackRF RTL-SDRColor:greenMaterial:metal + pcEffective band:Medium wave/Shortwave/Ultrashort waveApplicable environment:Indoor/OutdoorVoltage range:9V-15VPackage includes2 x Antenna2 x Module1 x Power cable
There are no reviews yet.