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4. This is an entry level measuring solution. Do not expect 100% accuracy.
| Product Type | PZEM-022 |
| Accuracy | 1.0 grade |
| Display Size | 51mm x 30mm |
| Product Size | 89.6mm x 49.6mm x 24.3mm |
| Weight | 150g(with split CT) |
| Test Range | 1. Voltage: 80~260V 5. Frequency: 45~65Hz 6. Power factor: 0~1PF |
| Function | 1. Electrical parameter measurement function (voltage, current, active power, energy, frequency, power factor) 2. Overload alarm function (over power alarm threshold, backlight and power flashing to alarm). 3. Power alarm threshold preset function (can set power alarm threshold). 4. The energy can be reset use the key. 5. Store data when power off. 6. Large-screen LCD 7. Backlight function. |
What's in the box?
1 x CT
Resources
FAQ
Why is the test data wrong? Voltage * Current = Power, But power is less than the actual test voltage * Current, Why is that?
Answer: There are three types of power:
Active Power (P represents / unit W)
Reactive power (Q represents / unit Var)
Apparent power (S represents / unit VA)
Here we only talk about Active Power, for others, please google it:
P = U * I * cosφ, cosφ it represents the power factor, purely resistive load (Such as incandescent, heater, etc.) the power factor is generally close to 1,Between the inductive and capacitive load load power factor 0-1. So purely resistive load test time, P is substantially equal to or close to U * I. When Inductive or capacitive load test (Such as refrigerators, washing machines, televisions, computers, etc.) P<U*I, As for how much to keep the power factor related to the specific, Different for each appliance power factor.
Know how much rain you got overnight with this digital wireless rain station
Features
- Outdoor wireless sensor (range up to 100 meter)
- Detail display of rainfall data in 1hour, 24hour, week, month
and total since last reset(user selectable in inch or mm) - Indoor and outdoor temperature (°F to °C)
- Time and date with manual setting option
- 12 /24 hour time mode
- Calendar
- Time zone setting
- Time alarm
- Free standing
Specifications
- Rainfall display range: 0 to 19,999mm
- Outdoor temperature range: -40 ~ 65°C (-40°F to 149°F)
- Indoor temperature range: -9.9 ~ 60°C (-15.8°F to 176°F)
- Temperature accuracy: ±1.0°C5) Power requirements:
a) Receiver: 2 x "AA" alkaline batteries (not included)
b) Rain gauge: 2 x "AAA" alkaline batteries (not included) - Transmission range: up to 100meters( 330feet)
- Transmission frequency: 433MHz
What's in the box?
1 x Rain Gauge
1 x Receiver
1 x User Manual
2 x Screws
Features
- Support Card Type: Read-only ID cards (such as EM4100, EM4001, etc.)
- Working voltage: 4.5~5.5VDC
- Working current: 40mA (max)
- Working frequency: 125KHz
- Reading distance: 2~5cm
- Logic Interface: UART TTL serial port
- Communication format: 8N1
- Baud rate: 9600
- Induction coil: pluggable
- Coil size: 35X40mm
- Coil lead length: 15cm
- Great for DIY
- Applications: Access control systems, Attendance system
What's in the box?
1 x 125KHz Serial UART RFID Card Reader
Resources
- Interfacing with ESP32, Arduino and NodeMCU
- Interfacing with Raspberry Pi
Specifications
- Type:Field-Effect Transistor
- Brand Name: International Rectifier
- Package Type: Throught Hole
- Model Number: IRFZ44NPBF
- TO-220AB: MOSFET N-Channel, Metal Oxide
- 55V 49A: FETs - Single
- Mosfet Type : N-channel
- Current Rating : 49A
- Rds (On) : 17.5mΩ
- Voltage Rated : 55V
What's in the box?
1 x IRFZ44N Transistor
Resources
Introduction to Transistors
Different Types of Transistors and Their Working
Features
- Name: Arduino MEGA2560 R3 DIY acrylic case
- Dimensions: 118 x 72 x 18mm
- Weight: 72g
- Material: A level acrylic
- For Arduino MEGA2560 R3 Development Board only
Please Note: Arduino Mega is not included. Don't forget to remove the protective film from the acrylic parts.
What's in the box
1 x Transparent Acrylic case
Features
- Total length: about 250M
- Wire type: 30AWG
- Single core wire outer diameter: 0.55mm
- Copper core diameter: 0.25mm.
- Temperature: 80 degrees, single-strand copper core crossing tin, with antioxidant effects.
- Colour: Red
What's in the box?
1 x Red wire wrap
Specifications
- Size: 40mm x 40mm x 10mm
- Voltage: DC 24V 0.1A
- Cable length: 200mm
- Application: For 3D Printer Ender-3
What's in the box?
1 x Creality 3D® cooling fan
Features:
- Opening size: 13x13mm
- Rated input current (RMS): 10% - 120% of that is 3A - 36A
- Output voltage(RMS): linear output. When the input current is 30A, the output voltage is 1V
- Linearity: ± 3%
- Output connectors: 3.5mm standard three-pin plug
- Lead length: 1 m
What's in the box?
1 x Current sensor
This sensor is perfect for use with our Raspberry Pi RPICT3T1 current and temperature sensor board.
This is a split-core current transformer which is used as an AC current sensor. It is popularly used for current measurement, monitoring and protection for AC motors, lighting equipment, air compressors, home automation etc.
Features
- Opening size: 13 x 13mm
- Rated input current (RMS): 10% - 120% of that is 1A~100A
- Output voltage(RMS): linear output. when the input current is 100A, the output voltage is 1V
- Linearity: ± 3%
- Output connectors: 3.5mm standard three-pin plug
- Lead length: 1m
What's in the box?
1 x Split-Core Current sensor
Specifications
- Model: PJ-392
- Size(LxWxH): Approx. 22.5mmx 8mm x 8mm/ 0.89x3.15x3.15"
What's in the box?
1 x Stereo Headphone Audio Video Jack Socket
- Using the ITR20001 Reflective Photoelectric Sensor
- Five ITR20001/T infrared light detectors are used with higher sensitivity, wider detection range and anti-interference.
- Five-channel analog output, higher accuracy, so that the tracking range of the car is wide and stable
Connection Reference:
VCC: Connect 3.3~5V
GND: Connect GND
U1: Connect MCU.IO(Channel, analog output)
U2: Connect MCU.IO(Channel, analog output)
U3: Connect MCU.IO(Channel, analog output)
U4: Connect MCU.IO(Channel, analog output)
U5: Connect MCU.IO(Channel, analog output)
Specifications:
Note:
*Please allow 1-3mm difference due to manual measurement.
Package Includes:
1 x Infrared Tracking Sensor
When the soil moisture is lower than preferred setting, the relay will automatically pull in, start the sprinkler, water pump etc. until the moister reaches the desired humidity level and automatically stop.
Product use: Through the potentiometer, adjust to the desired soil moisture level
Specifications
- Electrical parameters: Supply voltage: 12VDC
- Input current: more than 100mA
- Relay Load Max: 10A 250V AC or 10A 30V DC
What's in the box?
1 x Soil moisture control module
1 x Soil sensor
2 x 20cm long DuPont lines
Resources
Module instructions
1 Module sensors applied to the detection of soil moisture,
2. Blue potentiometer is used to adjust soil moisture level, clockwise adjustment and control the humidity will be bigger, counterclockwise smaller;
3. Due to module delay function, adjust the humidity value, wait about 5-8 seconds, see if the the relay state changed, the green LED lamp will also have corresponding change, until adjusted to meet the requirements.
Specifications
Size: 62mm(L)x44mm(W)x23mm(H)
Input Voltage (Trigger): DC 3-32V
Output Voltage(Line): AC 24-380V
Output Current(Line): 50 A
On Voltage: ≤1.6V
OnOff Time: ≤10ms
Control Current: 3-35mA
Transparent Lid Included: Yes
What's in the box?
1 X 50A SSR-50DA Solid State Relay With Cover
Resources
Datasheet available at https://cdn.sparkfun.com/datasheets/Components/General/SSR40DA.pdf
Depending on how hard your relay works, you might want to add a heat sink to it.
Q:During continuity testing with my multimeter why does my relay on the AC side not switch on?
A: The below info was found at http://www.crydom.com/en/tech/newsletters/solid statements - bench test an ssr.pdf
A multimeter determines impedance by injecting a small amount of voltage through it's probes into the circuit being tested. It then measures the current flowing through the probes and calculates resistance. Easy enough; Resistance = Voltage / Current! However, as we just discussed above, a solid state relay’s output turns on by “stealing” a bit of voltage from the AC mains in order to supply current to the gate of the SCRs. Simply put, if the AC mains is not connected to the relay then the output cannot turn on. Since the voltage and current produced by a multimeter is not sufficient enough to turn on the SCRs, the output of a solid state relay will remain in the off state; even with the input signal applied. As a result, SSRs will sometimes fail an incoming inspection because the engineer expects to see a significant change in the output impedance when they turn on the relay.The most effective way to bench test a solid state relay is to construct a simple test circuit consisting of a DC power supply or battery (a 9Vdc battery will work fine in most cases ) and a 60W or 100W light bulb.
Specifications
| Colour | Black blue |
| Material | Plastic iron |
| Specification | Detecting range: 0.591" (15mm); Detecting method: Reflective; Collector Emitter Voltage: 70V; Collector Current: 100mA; Forward Current: 60mA; Output type: Phototransistor; Working temperature: -25~85'C |
| Features | Compact construction, sense the presence of an object by using the reflective IR beam from the object |
| Application | Perfect for line tracking robot car DIY project |
| Packing List | 1 unit |
What's in the box?
1 x TCRT5000L Reflective switch
Resources
How to use TCRT5000 switches
What's in the box?
2 x USB female adapter boards
Resources
Please Note:
You will need to solder 3V regulator by yourself.
ESP07, ESP08, ESP12 module boards, or voltage regulator are not included.
What's in the box?
1 x Serial Port WIFI ESP8266 Module Adapter Plate
2 x Pin headers
JST XH connectors were developed based on the high reliability and versatility of the NH series connectors
What's in the box?
2pin = 10Sets =20PCS
3pin = 10Sets =20PCS
4pin = 10Sets =20PCS
5pin = 10Sets =20PCS
Pin Connector Terminal :150PCS
Specifications
- 250 V
- 3A
- 10mm x 15mm
1 x Black Mini Rocker Switch
Resources
Python library
Introduction to Buttons and Switches
Types of buttons and switches
Description:
Crimps 8P8C/RJ-45,6P6C/RJ-12, and 6P4C/RJ-11 connectors
Ratcheted handle movement for added precision
Plastic-covered handles to reduce fatigue
This small size Bluetooth 4.0 TTL transceiver module allows your target device to communicate with your iPhone/iPAD, IOS 6 or Android 4.3 devices.
Features
- It's easy to use and completely encapsulated.
- You can set it as slave or master.
- You can use AT command to set the baudrate.
Specifications
- Ultra-low standby power consumption 90uA~400uA
- Coverage up to 60 meters
- Built in PCB antenna
- Power input: 3.6V-6V DC(Can not higher than 6V)
- Size: 43mm x 15mm
- Colour: Blue
- Net Weight: 4g
What's in the box?
1 x IOS HM-10 BLE Bluetooth 4.0 CC2540 CC2541 Serial Wireless Module
Resources
Setup