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The LiPo low voltage Tester cum Alarm is small and light for on board use, plugs into balance lead for detecting low voltage on individual cells. A loud alarm will go off with flashing LED if the voltage on any of the individual cells drops below the adjustable threshold. Essential while working with any Lithium Polymer battery.
This tiny module is perfect for charging single cell 3.7V 1 Ah or higher LiPo cells such as 16550s that don’t have their own protection circuit.Based around the TP4056 charger IC and DW01 battery protection IC this module will offer 1A charge current then cut off when finished.Futhermore when the battery voltage drops below 2.4V the protection IC will switch the load off to protect the cell from running at too low of a voltage – and also protects against over-voltage and reverse polarity connection (it will usually destroy itself instead of the battery) however please check you have it connected correctly the first time.
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SMD diodes LL34 have a range of anode/cathodeidentifiers. Sometimes it’s easiest to just use a multimeter to test for polarity. Turn the multimeter to the diode setting (usually indicated by a diodesymbol), and touch each probe to one of the LEDterminals. … Diodes certainly aren’t the only polarized component.
This is an LM2596 DC-DC buck converter step-down power module with high-precision potentiometer for adjusting output voltage, capable of driving a load up to 3A with high efficiency. When the output current required is greater than 2.5A(10W) an external heatsink is suggested. Use on board switch to change display measurement between the input or output voltage, and a LED indicate which value(IN/OUT) is being measured. This setting is stored even after power off. Voltmeter can be turned off, just keep the switch pressed for 1 second and leave it. Adjust Input and output voltage measurement error offset – long press switch for 4 seconds or more, the digital display flashes, then short press the button to change the value of output (values range from -0.5 to 0.5, the unit is V), a positive number indicates an upward calibration, negative downward calibration. Now press the button again for adjust input offset in same manner.
LM393 SOP8 Low Power Low Offset Voltage Dual Comparator.The LM393 is a dual differential comparator; this means that it accepts 2 inputs for comparison. It compares these voltage inputs and determines which is the larger value. Based on this, electronic decisions can be made based on which input is greater and which is smaller.
This extension tube set can help you achieve macro lens while not affect the picture quality because there is no optics inside. The closer the focus, the greater the magnification.
It is used between camera body and 35mm single-lens reflex camera. It comes as a set of 3 tubes in different lengths, and you can use them in single ones or in combinations as prefer. The electronic copper pins make it perfect to couple with camera’s auto diaphragm, TTL metering.
Fit for Canon EOS series camera and DSLR camera
This product is a serially driven 8×8 LED Matrix which powered by MAX7219.The 8×8 LED Matrix is easy to use and compatible with Arduino, only needs three data lines and two power lines. It can be used in lots of place like various types of electronic display panels. You can make your applications more vivid because of the LED brightness adjustment can be implemented in software. For the kit of this module
Heart Rate click carries Maxim’s MAX30100 integrated pulse oximetry and heart-rate sensor. It’s an optical sensor that derives its readings from emitting two wavelengths of light from two LEDs – a red and an infrared one – then measuring the absorbance of pulsing blood through a photodetector. This particular LED color combination is optimized for reading the data through the tip of one’s finger. The signal is processed by a low-noise analog signal processing unit and communicated to the target MCU through the mikroBUS I2C interface. Developers of end-user applications should note that the readings can be negatively impacted by excess motion and changes in temperature. Also, too much
pressure can constrict capillary blood flow and therefore diminish the reliability of the data. A programmable INT pin is also available. Uses3.3V power supply.
The MAX6675 performs cold-junction compensation and digitizes the signal from a type-K thermocouple. The data is output in a 12-bit resolution, SPI™-compatible, read-only format. This converter resolves temperatures to 0.25°C, allows readings as high as +1024°C, and exhibits thermocouple accuracy of 8LSBs for temperatures ranging from 0°C to +700°C. The MAX6675 is available in a small, 8-pin SO package
The MAX6675 performs cold-junction compensation and digitizes the signal from a type-K thermocouple. The data is output in a 12-bit resolution, SPI™-compatible, read-only format. This converter resolves temperatures to 0.25°C, allows readings as high as +1024°C, and exhibits thermocouple accuracy of 8LSBs for temperatures ranging from 0°C to +700°C. The MAX6675 is available in a small, 8-pin SO package
Fast Quick Charger QC3.0 DC-DC Step Down Buck Converter 
MB102 Solder less Breadboard Power Supply Module 3.3V/5V 
