3pcs 9v 12v

Buy 3pcs 9V 12V 24V to 5V DC-DC USB Step Down Module Car Charging Car Charger for R210.00

Scope: Mainly used in battery (9V or 12V) voltage monitoring, simple and practical, support sound and light alarm. Features: When the buzzer low voltage will "DiDiDi" sounds and the red LED lights up, when the battery voltage rise above to the set value, buzzer will stop alarm. Size: 2.9 x 3 cm The main chip: LM358 9V Battery: When a battery over-discharge (battery voltage drops below about 8V), the red lights and the buzzer calling to achieve sound and light alarm, to achieve control battery discharge status, prevent over-discharge battery, and damage battery; 12V Battery: When a battery over-discharge (battery voltage less than 10.4V), the red lights and the buzzer calling to achieve sound and light alarm, to achieve control battery discharge status, prevent over-discharge battery, and damage battery; Advantages: With a sound and light alarm, simple and practical. The module input with reverse protection, if reverse polarity power input will not burn. But without overvoltage protection, if the input exceeds 15V, the chip above the module will burn out. Adjustment method: 9V Battery: Input 9V, the LM358 voltage adjustment between 2 feet and 4 feet to about 5.78V, the alarm voltage is 8V (we has set it before shipment, so you don't need to adjust it again). Clockwise adjustment, 2 feet and 4 feet voltage is reduced, the sensitivity increased. 12V Battery: Input 12V, The LM358 voltage adjustment between 2 feet and 4 feet to about 6.05V, the alarm voltage is 10.4V (we has set it before shipment, so you don't need to adjust it again). Clockwise adjustment, 2 and 4 feet voltage is reduced, the sensitivity increased. Package includes: 3 x Battery Over-discharge Protection Module

3pcs AC-DC 12V 0.5A 6W Switching Power Bare Board For LED Stage Light AC 100-240V To DC 12V Description: 1. Input voltage: AC 100V-240V 50-60Hz2. Output voltage: DC 12V3. Output current: 500ma4. Output power: 6W5. Size: 5.5 x 3.5 x 1.9cmPackage included:3 x AC-DC 12V 500ma 6W switching power module

3pcs DIY 12V 8 x AA Battery Holder Box Case With Leads Switch Feature:Material: ABS impact resistant materialHardware: Nickel-plated steelSpring: Nickel-plated steelRivet: NoneWire: 1007 # 26AWGColor: BlackPackage included:3 x DIY 12V 8 x AA Battery Holder Case Box With Leads Switch

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FAST AFFORDABLE COURIER SHIPPING TO SOUTH AFRICA Summarize: LC 12V WiFi relay module carried a ESP8266 WiFi module and microcontroller. It will send the serial port instructions to the cell phone APP and Implementation within the local area network (LAN) for wireless control relay. The function and characteristics: Onboard ESP8266 WIFI module, AP mode 5 client can be connected at the same time; Module has two work modes: 1, cell phones, carry on the WiFi module;2, mobile phone and WiFI module Carrying on the same router, by mobile phone APP to control relay; Transmission distance: 1, the open environment, the mobile phone when carrying on the WIFI module maximum transmission distance of 400 m; 2, when the WiFI module and cell phone carrying on the router at the same time the signal transmission distance in accordance with the router on the weak; Onboard 12 v, 10 A / 250 v AC 10 A / 30 v DC relay, absorb 100000 times continuously; Module with diode effusion protection, short response time; Module baud rate: 9600,8,1,0,0. Introduced the hardware and instructions: Size: 45*28mm The board function description: IN +,IN-: 12 v power input; TX,RX and GND: a serial port debug pins; Introduction: Onboard the ESP8266 WIFI module has three work modes: STA (client), AP (hot), the STA + Ap(hot +client), according to the workings of a module to the corresponding choice of WIFI module working mode.Module need before use serial debugging software and USB to TTL module send serial command was carried out on the WIFI module configuration (don't power outages after configuration is complete, as some of the parameters of WIFI module cannot be saved when the power is cut off), mobile phone and WIFI module after establishing a network connection can use the phone APP control relay. App download from here ! Package included: 3 x ESP8266 12V WiFi Relay Networking Smart Home Phone APP Remote Control Switch 3Pcs ESP8266 12V WiFi Relay Networking Smart Home Phone APP Remote Control Switch 3Pcs ESP8266 12V WiFi Relay Networking Smart Home Phone APP Remote Control Switch 3Pcs ESP8266 12V WiFi Relay Networking Smart Home Phone APP Remote Control Switch

FAST AFFORDABLE COURIER SHIPPING TO SOUTH AFRICA Features: LC 5A Over-current protection Sensor module uses current transformer to collect the AC signal to achieve the relay over-current signal output within 0-5A. Relay pull while over-current, relay released while not over-current. Users can use the relay COM, NC, NO three ports to control the external circuit on and off, in order to achieve over-current protection. Functions: -Current detection resolution can change the parameter of resistance parameters; -Output over-current switching signal output; -Over-current signal setting critical point adjustable, Specifications: Operating voltage: DC12V Operating current: Operating frequency range: 20Hz ~ 400Hz Output mode: switch signal output Maximum detection wire diameter: 5.2mm Mounting hole: hole diameter is 3mm, hole distance is 52.5mm Operating environment: -40 ￢ﾄﾃ ~ +85 ￢ﾄﾃ The current detection range:AC0.3A-5A Board size: 38 * 44mm The Board Description: VCC: Operating voltage positive; GND:Operating voltage negative; NO: Normally open, the relay pulls before the NO and COM disconnect, short-circuit after the suction; COM: common, relay common interface; NC: Normally closed, the relay before the NC and COM short-circuit, pull off after. Using Instructions: By setting the potentiometer to set the overcurrent protection point, the clockwise adjustment reduces the detection current. As bellows: 1. Measured the wire through the current transformer, connect VCC and GND to DC12V power supply; 2. Adjust the potentiometer, when you hear the sound of the relay pull (can be measured with a multimeter COM and NO whether was turned on, if connected to the relay means activated), then reduce or cut off the current flowing that through the tested wire, if the relay release at this time that over-current protection point has been identified (available to multimeter COM and NC measurement whether is connected, if connected to the relay means been released); 3. When reduce or cut off the current flowing through the wire, the relay is not released, will still need to continue to adjust the potentiometer to find the over-current protection point. Package Included: 3 x 5A 12V Relay Module 3Pcs DC 12V 5A Overcurrent Protection Sensor Module AC Current Detection Relay Module Switch Output 3Pcs DC 12V 5A Overcurrent Protection Sensor Module AC Current Detection Relay Module Switch Output 3Pcs DC 12V 5A Overcurrent Protection Sensor Module AC Current Detection Relay Module Switch Output

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