20pcs garden adjustable

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20Pcs Soil Hygrometer Humidity Detection Moisture Sensor For Arduino Description: This is a summary of the soil moisture sensor can be used to detect moisture, when the soil is dry, the module outputs a high level, whereas output low. Using this sensor make an automatic watering system, so that your garden plants without people to manage. Operating voltage: 3.3V~5V. Adjustable sensitivity (shown in blue digital potentiometer adjustment) Dual output mode,analog output more accurate. A fixed bolt hole for easy installation. With power indicator (red) and digital switching output indicator (green). Having LM393 comparator chip, stable. Panel PCB Dimension: 3cm x 1.5cm. Soil Probe Dimension: 6cm x 2cm. Cable Length: 21cm. VCC: 3.3V-5V. GND: GND. DO: digital output interface(0 and 1). AO: analog output interface. Instructions for Use: 1. Soil moisture module is most sensitive to the ambient humidity is generally used to detect the moisture content of the soil. 2. Module to reach the threshold value is set in the soil moisture, DO port output high, when the the soil humidity exceeds a set threshold value, the module D0 output low. 3. The digital output D0 can be connected directly with the microcontroller to detect high and low by the microcontroller to detect soil moisture. 4. The digital outputs DO shop relay module can directly drive the buzzer module, which can form a soil moisture alarm equipment. 5. Analog output AO and AD module connected through the AD converter, you can get more precise values of soil moisture. Package Included: 20 x Soil moisture detector module 20 x Probe 20 x 2P Jumper Cable

20Pcs NE555 Pulse Frequency Duty Cycle Adjustable Module Square Wave Signal Generator Features: 1. As a square wave signal generator,generates a square wave signal used for experimental development. 2. Used to drive a stepper motor for generating a square wave drive signal. 3. Generate adjustable pulse for MCU. 4. Generate adjustable pulse,to control circuitry associated. 5. Size: 31mm x 22mm 6. Main chip: NE555 7. Input Voltage: 5V-15V DC. When power supply is 5 V, the output current can be 15 MA around; when 12V power supply, the output current can 35 MA around 8. Input current: >=100 MA 9. Output amplitude: 4.2V V-PP to 11.4V V-PP. (Different input voltage, the output amplitude will be different) 10. Maximum output current: >=15MA (5V power supply, V-PP greater than 50%), >=35MA (12V power supply, V-PP greater than 50%) 11. Output with LED indication(low level,LED will on; high level,LED will off;low frequency, the LED flashes) 12. The output frequency range is selectable: LF file: 1Hz ~ 50Hz                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        &nbs

20pcs 4.75V-24V To 0.92V-15V DC-DC Adjustable Power Supply Buck Converter Step Down Module Package contains 1 X item of the smallest listed variant.

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Specifications: Output Current: 1.5A (minimum), 2.2A (typical value) Input-output voltage difference (VI-VO): 40Vdc (max) Adjustable output voltage range: 1.2 - 37V Working temperature: -55 ° C to + 150 ° C Current output: 1.5A Voltage Input: 4.2 - 40 V Operating temperature: 0 ° C - 125 ° C Characteristic frequency: 100 (MHz) Module size: 35.6 (mm) x 16.8 (mm) Output mode: VOUT output positive, GND output negative Package included: 20 x LM317 DC-DC 1.5A 1.2-37V adjustable power board

FAST AFFORDABLE COURIER SHIPPING TO SOUTH AFRICA Description: Material: plastic, metal Suitable for electric furnace, water heater, lamps, small motor, electric iron. etc Input Voltage: 220V Maximum Power: 2000W Adjustable Voltage: 90-220V AC Size: 5.3 x 4.7 x 2.8 cm Life span and easy installation Chip is 25A. If you use this for voltage adjustment, 1000W, under 5A is nice. If you use this for electrical machine, under 3A is nice. How to use: Connect this device with lamp or home appliance in a series connection, that is, Using the module's two wires connected to lamp or home appliances' disconnect FireWire or zero line. You can play a brightness adjustment, speed, pressure, temperature control effect, very convenient to use. Package included: 20 x Voltage regulator 20pcs 2000W Speed Controller SCR Voltage Regulator Dimming Dimmer Thermostat 20pcs 2000W Speed Controller SCR Voltage Regulator Dimming Dimmer Thermostat 20pcs 2000W Speed Controller SCR Voltage Regulator Dimming Dimmer Thermostat