Test/Measure/Experiment
You can use this device from 3.5-7VDC input voltage (although most USB devices tend to hover around 4.75 to 5.25) and up to 3A of current. It flips between voltage and current readouts every 3 seconds or so. It's a very handy tool for testing USB devices, checking load levels and debugging battery chargers and boost converters.
Specifications:- USB 1.x and 2.x - all data speeds. Does not have USB v3 pins so USB v3 connections will automatically downgrade to v2
- Working Range: 0~3A, 3.5~7VDC
- Resolution: 10mV / 10mA
- Operating Temperature: 0-60ºC
- Contents:
- Camera Board 360 Gooseneck Mount V2
Dimensions:
- 21mm x 53mm x 15mm / 0.8" x 2.1" x 0.6"
- USB Plug: 13mm / 0.5"
- Weight: 16.2g
1 x USB Voltage and Current Meter
Features
- Display Colour: Red
- The black line connects to the negative electrode, red line connects to positive pole of power supply, white line connects to positive pole of tested power supply
- Material: Plastic Shell
- Display Digit: 3
- Measuring Range: DC 4.5-30V
Working voltage: 4.5-30V - Overall Dimension: Approx 28mm x 47mm x 21mm
RASPBERRY PI NOT INCLUDED(Neither the key-ring and keys for those who wondered)
This cute little GPIO reference board from allows you to quickly and easily distinguish between the different pins of the Raspberry Pi Model B , Raspberry Pi 2B, Pi 3B and Pi 4B . It's even got a key chain hole, so you can carry it around and keep it handy - you'll never know when you need to hack a Pi!
The GPIO reference board features BCM numbering on one side and the pin names on the other. It can be soldered for permanent referencing, or slipped on and off when required.
On the RPi3 and later you'll have to snip off a little bit of the corner closest to pin 39 thanks to the new POE pins on the board
What's in the box?
1 x GPIO reference board
Description:
This is an Experimental Platform For Raspberry Pi 2/3 Model B and B and Arduino UNO R3
With Breadboard, Male to Female jumper cables, T type 40Pin GPIO, Ribbon Cable.
Package includes:
1 x Acrylic Platform (with Installation screws pack)
1 x Breadboard 800
10 x Male to Female jumper cables (Length: 25cm±2cm)
1 x T type 40Pin GPIO
1 x 40 pin ribbon Cable (20cm±2cm Length)
Specifications
- Tests both RJ45 (max 8-pin Network) and RJ11 (max 6-pin phone)
- Powered by a single 9V cell battery(not included)
- Carrying case not included
What's in the box?
1 x RJ45 RJ11 Cable Tester
This clever little Servo Tester Module has three modes to check the reaction times, neutral points and maximum angles for up to 3 servos simultaneously.
Specifications
- Item Name: Servo Tester
- Size: 46x32x17mm
- Weight: 8g
- Color: Blue
- Input: DC 4.2 to 6.0V
- Output: ≤15mA (5.0)
- Output signal: 1.5ms±0.5ms
- Adjustment Methods: Manual, Neutral, Automatic.
Features
- Small size,low power consumption,high reliability and easy operation.
- It can easily detect and configure server virtual bit, jitter and middle position.
- Can connect two servos or ESC;
- MCU control,good stability,high accuracy.
Note:
This product can't test a servo with a weight more than 55g.
If you want to test the motor, please first connect the ESC.
What's in the box?
1x servo tester
The hole gap is 2.54mm, and it's compatible with IC with DIP package.
The IO port can be quickly and easily implement your ideas.
Note:
- Extra header spacer included
- 170 tie points breadboard arranged in 34 rows of 5 pins included
Package includes:
1 x Prototyping Shield kit
- Auto Range.
- True RMS measurement.
- Resistance capacitance frequency file high voltage 550V protection.
- Large screen display, the maximum of 6000 words.
- Sampling rate: about 3 times per second.
- Temperature measuring.
- Backlight display.
- Data retention.
- Polarity automatic recognition.
- Low voltage display.
- 10A large current measurement MA level small current measurement Automatic shutdown.
- Main measurement: AC / DC voltage, AC / DC current, resistance, capacitance.
- Diode / off measurement, frequency and duty ratio measurement.
Function | Range | Resolution | Accuracy | MAX.Value | Other |
DC Voltage | 6.000V | 0.001V | ±(0.5% 3) | 1000V | Input Resistance:10MΩ |
60.00V | 0.01V | ||||
600.0V | 0.1V | ||||
1000V | 1V | ||||
60.00mV | 0.01mV | 600mV | |||
600.0mV | 0.1mV | ||||
AC Voltage | 6.000V | 0.001V | ±(1.0% 3) | 750V | Input Resistance:10MΩ(600mV range, >60MΩ) Frequency Response: 40Hz-1kHz |
60.00V | 0.01V | ||||
600.0V | 0.1V | ||||
750V | 1V | ||||
60.00mV | 0.01mV | 600mV | |||
600.0mV | 0.1mV | ||||
DC Current | 6.000A | 0.001A | ±(1.2% 3) | 10A | MAX.Current: 10A(no more than 15 seconds) No Voltage input at this mode Frequency Response(AC): 40Hz-1kHz |
10.00A | 0.01A | ||||
60.00mA | 0.01mA | 600mA | |||
600.0mA | 0.1mA | ||||
AC Current | 6.000A | 0.001A | ±(1.5% 3) | 10A | |
10.00A | 0.01A | ||||
60.00mA | 0.01mA | 600mA | |||
600.0mA | 0.1mA |
Resistance | 600.0Ω | 0.1Ω | ±(0.5% 3) | 60MΩ | No Voltage input at this mode | |||||
6.000kΩ | 0.001kΩ | |||||||||
60.00kΩ | 0.01kΩ | |||||||||
600.0kΩ | 0.1kΩ | |||||||||
6.000MΩ | 0.001MΩ | |||||||||
60.00MΩ | 0.01MΩ | ±(1.5% 3) | ||||||||
Capacitance | 9.999nF | 0.001nF | ±(5.0% 20) | 9.999mF | No Voltage input at this mode | |||||
99.99nF | 0.01nF | ±(2.0% 5) | ||||||||
999.9nF | 0.1nF | |||||||||
9.999μF | 0.001μF | |||||||||
99.99μF | 0.01μF | |||||||||
999.9μF | 0.1μF | |||||||||
9.999mF | 0.001mF | ±(5.0% 5) | ||||||||
Frequency | 99.99Hz | 0.01Hz | ±(0.1% 2) | 9.999MHz | ||||||
999.9Hz | 0.1Hz | |||||||||
9.999kHz | 0.001kHz | |||||||||
99.99kHz | 0.01kHz | |||||||||
999.9kHz | 0.1kHz | |||||||||
9.999MHz | 0.001MHz | |||||||||
Duty Cycle | 1%~99% | 0.1% | ±(0.1% 2) | |||||||
Diode | √(DC forward current is 5mA, voltage is 3V) | No Voltage input at this mode | ||||||||
Continuity | √(no more than 50Ω) | |||||||||
Temperature | -20~1000℃ | 1℃ | ±(2.5% 5) | 1000℃ | ||||||
-4~1832℉ | 1℉ | 1832℉ |
- Measurement mode: double-integral style A/D transform
- Sample rate: 3 times per second
- Over range indication: OL
- Powered by 2 x AAA batteries (Not included).
- Working Environment: 0-40 degrees relative humidity: <80%
- Product size: approx. 130 x 65 x 30mm/5.11 x 2.55 x 1.18''
- Net weight: approx. 170g
- Gross weight: approx.238g
The LiitoKala Lii-402 Smart Charger for Lithium Ion and NiMH batteries is the perfect bench mate to keep your radios, robotics and flashlights running at peak efficiency. In a sea of endless chargers for sale, we have found one that will meet and exceed the needs of many consumers.
Specifications
Product name: Liitokala Lii-402 Micro USB 4Slots Battery Charger
Input : Micro USB DC 5V/2A
Output
- 1.42V
- 4.2V±0.05V
- 3.65±0.05V
- 4.35±0.05V
Current
- 2000mA*1
- 1000mA*2
- 700mA*3
- 500mA*4
Constant voltage, cut-off current: less than 100mAh
Standby current: less than 15mAh
Compatible with
Ni-MH/Cd
AA/AAA/A/SC Sizes
3.7V Li-ion battery including
26650,22650,26500,18650,18490,17670,17500,16340,14500,10440
Size: 112mm x 90mm x 30mm (L x W x H)
Weight: 150 grams (incl. micro cable)
USB Output function
1. 0pen-circuit voltage of USB output : 4.9-5.3V; and the 4th slot is fixed for the USB discharge power source
2. Output current: 1000mAh
3. Open circuit current: <1mAh
4. The corresponding voltage is 4.75-5.25V under 1000mAh current
5. Cut-off voltage for discharge protection: 3.0±0.1V
1 x Liitokala Lii-402 Micro USB 4Slots Battery Charger
1 x USB micro B male to USB A male Cable
You will also need.....
power supply for this charger
Usage Examples
How Much Power Does my Fridge Use - with the Battery connected to the SOURCE side and Car Fridge (or other accessory) connected to the LOAD side. The Watt Meter shows the current into the Fridge, voltage and power at the battery and accumulates the Ah and Wh while the fridge is running.
How much charge is going into my battery - With a battery charger (or alternator) connected to the SOURCE side and the aux battery connected to the LOAD side, the Watt Meter shows the charging current into the battery, the voltage and charging power at the battery and accumulates the charge (Ah) and energy (Wh) into the battery.
What is the output of my solar panel - With a solar panel connected to the SOURCE side and solar regulator connected to the LOAD side, the Watt Meter shows the charging current into the regulator, the voltage and charging power at the solar panel and accumulates the charge (Ah) and energy (Wh) into the regulator.
How much charge is my solar panel putting into my battery - Now with a solar regulator connected to the SOURCE side and battery connected to the LOAD side, the Watt Meter shows the charging current into the battery, the voltage and charging power at the regulator and accumulates the charge (Ah) and energy (Wh) into the battery.
Specifications
Item Name | Watt Meter and Power Analyzer |
Item NO. | FT08 |
Operation Voltage | 4.8V-60V |
Measures Range | 0-130A, resolution 0.01A; 0-60V, resolution 0.01v; 0-6554W, resolution 0.1w; 0-65Ah,resolution 0.001An; 0-6441Wh,resolution 0.1Wh; |
LCD | 16 x 2, backlit LCD display |
Size | 85 mm x 43 mm x 25 mm (3.35 in x 1.69 in x 0.98 in) |
Weight | 82g |
Colour | Black |
What's in the box?
1x 130A High Precision Battery Watt Meter And Power Analyzer
Resources
English Manual please click here
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.
The top row is for 2 pin LED's with currents ranging from 2mA - 30mA
The bottom row is for 4 pin LED's (piranha LED's) with currents ranging from 20mA - 150mA
Specifications:
Material: Plastic
Colour: White
Lightweight & compact
Item size(L*W*H) : Approx. 80mm x 55mm x 22mm
Powered by a 9V battery (not included)
What's in the box?
1 x LED tester
Specifications
- Voltage 0.0V to 100V
- Current 0A to 10A
- Working voltage DC 4 to 30V
- Working current <20mA
- Size 48mm x 29mm x 22mm
What's in the box?
1 x Digital Voltmeter Ammeter
Resources

Features
- Material: Plastic
- Indoor temperature °C display.
- It comes with a mounting clips which allows it to be panel mounted
- Temperature range: -50 ~ 70 Degrees.
- Usage temperature: -10 ~ 50 Degrees.
- Usage humidity: 5% ~ 80%
- Accuracy: /-01 Degrees.
- Distinguishing temperature: 0.1 Degrees.
- Power: 2 x DC1.5V LR44 button batteries (Not included)
- Cable length: 0.8M.
- Size: 48 x 28 x 15(mm)
- Colour: Black
What's in the box?
1 x LCD Digital Thermometer Temperature Sensor
Specifications
- Working current:5-15mA
- Eight electricity Level Resolution:10% 25% 40% 50% 60% 75% 90% 100%
- Voltmeter accuracy:1%
- Working temperature: -10 ~ 65 Celsius
- Operating Humidity: 10 ~ 80%
- Dimensions: 48mm x 29mm x 22mm
Indicator
- Battery voltage is greater than 11.1V, 1 led indicator is lit.
- Battery voltage is greater than 11.3V, 2 led indicator is lit.
- Battery voltage is greater than 11.6V, 3 led indicator is lit.
- Battery voltage is greater than 11.9V, 4 led indicator is lit.
- Battery voltage is greater than 12.2V, 5 led indicator is lit.
- Battery voltage is greater than 12.5V, 6 led indicator is lit.
- Battery voltage is greater than 12.9V, 7 led indicator is lit.
- Battery voltage is greater than 13.3V, 8 led indicator is lit.
What's in the box?
1 x lead acid LED indicator battery capacity tester voltmeter 12V
This is a 4-ch current and power monitor HAT designed for Raspberry Pi. Via the I2C or SMBus interface, it is easy to monitor each channel's current, voltage, and power consumption, as well as the voltage between both sides of the sampling resistor.
- Standard Raspberry Pi 40PIN GPIO extension header, supports Raspberry Pi series boards
- 4-ch monitoring, via I2C/SMBus interface
- Onboard 0.1Ω 1% sampling resistor, allows measuring bi-directional current up to 3.2A
- Embedded 12-bit ADC, supports multiple successive converting, 0~26V voltage measuring range
- Directly calculate and output measured power value through additional multiply register
- I2C control pins for connecting with other host boards
- Comes with development resources and manual (examples for Raspberry Pi/Arduino/STM32)
Specifications
- Operating voltage: 3.3V/5V
- Control interface: I2C/SMBus
- Sampling resistor: 0.1Ω 1%
- Voltage range: 0~26V
- Current range: ±3.2A
- Resolution: 0.8mA (±3.2A range) OR 0.1mA (±400mA range)
- Dimensions: 65mm × 30mm
- Mounting hole size: 3.0mm
Dimensions

What's in the box?
1 x Current/Voltage/Power Monitor HAT
Resources
- ADUM3160 isolation voltage: 2500V
- Power module isolation voltage: 1500V
- Power supply: taken from the computer host USB port
- Operating environment: -40 °C to 85 °C
- Dimensions: 15mm x 25mm x 66mm
LCD Digital Multimeter AC/DC 750/1000V Handheld multimeter for voltmeter, ammeter Ohm tester meter with probes.
Specifications
- Brand Name: Rainwayer
- DIY Supplies: ELECTRICAL
- Certification: NONE
- Origin: CN(Origin)
- Model Number: Digital Multimeter
- AC Current: /
- Is Smart Device: No
- AC Voltage: 200-750V
- Measuring Resistance Range: 20k-2000k
- Operating Mode: Manual
- Measuring Inductance Range: /
- Display Type: Digital Display
- DC Current: 200u-2000u-20m-200m-10A
- DC Voltage: 200m-2000m-20-200-1000V
- Measuring Capacitance Range: /
- Dimensions: 126 x 70 x 24mm
- Operating Temperature: 0 - 40 ℃
- Colour: Black
What's in the box ?
The Raspberry Leaf GPIO template is a great way of identifying the GPIO pins on your Raspberry Pi. Small and effective, always handy to have in your spares box !
What's in the box ?
1 x Raspberry Leaf GPIO templates