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The Keyes-039 or KY039 Heart rate monitor consists of two things, an Infrared LED, and an Infrared Phototransistor. The IR LED should come on whenever the sensor has power and stay on (because it is infrared, you won’t be able to see that it is on, but if you look through your cell phone camera you will). The IR photo transistor causes the voltage to change on a “sensor” wire, and this should be connected to one of the Arduino’s analog pins. -
Introduction: These 3-wire digital temperature sensors are fairly precise (±0.5°C over much of the range) and can give up to 12 bits of precision from the onboard digital-to-analog converter. They work great with any microcontroller using a single digital pin, and you can even connect multiple ones to the same pin, each one has a unique 64-bit ID burned in at the factory to differentiate them. Usable with 3.0-5.0V systems. Technical Details: Technical specs: Usable temperature range: -5° to 90°C (-23°F to 194°F) 9 to 12 bit selectable resolution Uses 1-Wire interface- requires only one digital pin for communication Unique 64 bit ID burned into chip Multiple sensors can share one pin ±0.5°C Accuracy from -10°C to 85°C Temperature-limit alarm system Query time is less than 750ms Usable with 3.0V to 5.5V power/data -
The Leonardo is Arduino’s first development board to use one microcontroller with built-in USB. Using the ATmega32U4 as its sole microcontroller allows it to be cheaper and simpler. Also, because the 32U4 is handling the USB directly, code libraries are available which allow the board to emulate a computer keyboard, mouse, and more using the USB-HID protocol! It has 20 digital input/output pins (of which 7 can be used as PWM outputs and 12 as analog inputs), a 16 MHz crystal oscillator, a micro USB connection, a power jack, an ICSP header, and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started. -
1. 10 DOF Module (3 axis gyroscope 3 accelerometer 3 axis magnetic field air pressure) 2. Technology:Immersion Gold PCB 3. Chip: MPU6050 HMC5883L MS5611 4.Power Supply :3-5v 5.Communication: IIC communication protocol (fully compatible with the 3-5v System, circuit LLC is contained ) 6.Size: 2.2cm * 1.7cm -
Module feature and performance: 5A high-power and high efficiency reduction voltage and low ripple High quality and good performance With power light and voltage display with self-correcting. Adopting advanced voltage microprocessor, and the voltmeter error ±0.1V, measuring range is 0~40V (Note: Please make sure input voltage more than 3.5V to make the voltmeter normal working) Touch the button to change input or output voltage, LED indicator light display is measuring voltage, and can autosave which one voltage, keep pressing the key can turn off the voltmeter Input voltage 4.0～38V (the input voltage must be higher 1.5V than output voltage) Adjustable output voltage range: 1.25V～36V (the input voltage must be higher 1.5V than output voltage) Output power can reach 75W. Output current can reach 5A, suggested use it less than 4.5A (note: Please add a cooling fin into power chip, if you use it with high-power) -
- Input: DC 3V to 40V (input voltage must be higher than the output voltage to 1.5v above can not boost)
- Output: DC 1.5V to 35V voltage continuously adjustable, high-efficiency maximum output current of 3A.
- Features: All solid capacitors, the 36u thickening circuit boards, high-Q inductance with output value of high-power LED indicator
- Dimensions: 45 (L) * 20 (W) * 14 (H) mm (with potentiometer)
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FEATURES: - With voltage meter display,voltage meter error of±0.1V, the range of 0~40V. (note: to ensure that the voltage meter accuracy, please make sure that the input voltage is 4.2V or more). - Low light touch button switch measurement input or output voltage,and a light show is voltage measurement which road, and keep the last set, even if the power switch on again. - Voltmeter fine-tuning: hold down the button about 1-2s into fine-tuning mode, can remove button on the calibration at this time. (please do not use standby function, usually). - Low voltage meter can be closed,long press button closure voltmeter (minimum power loss). - Input voltage:4.2~40v(input voltage must be higher than to the output voltage of more than 1v). - Output voltage adjustable range1.25V~37V adjustable (input voltage must be higher than to the output voltage is more than 1V). -
The LilyPad Arduino consists of an ATmega328 with the Arduino bootloader and a minimum number of external components to keep it as small (and as simple) as possible. This board will run from 2V to 5V and offers large pin-out holes that make it easy to sew and connect. Each of these pins, with the exception of ( ) and (-), can control an attached input or output device (like a light, motor, or switch). -
ISD1820 chipset - On board microphone for directly recording - Supports up to around 10 seconds - High-quality, natural voice restored, can be used as a loudspeaker module - Loop playback, jog playback, single-pass playback - All main pins are lead out, allows to operate with microcontroller - Working voltage: 3~5V
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