Ocean College and School Students Science Projects materials

PRODUCT DESCRIPTION:

Bosch has stepped up their game with their new BMP280 sensor, an environmental sensor with temperature, barometric pressure that is the next generation upgrade to the BMP085/BMP180/BMP183. This sensor is great for all sorts of weather sensing and can even be used in both I2C and SPI!This precision sensor from Bosch is the best low-cost, precision sensing solution for measuring barometric pressure with ±1 hPa absolute accuracy, and temperature with ±1.0°C accuracy. Because pressure changes with altitude, and the pressure measurements are so good, you can also use it as an altimeter with ±1 meter accuracy.

Typical application：

Enhancement of GPS navigatione.g.time-to-first-fix improvement, dead-reckoning, slope detection, Indoor navigation (floor detection, elevator detection) Outdoor navigation, leisure and sports applications, weather forecast, health care application (e.g. sirometry); Vertical velocity indication (e.g. risk/sink speed); Target devices, handsets such as mobile phones, table PCs, GPS devices, navigation systems, portable health care devices, home weather stations, flying toys, watches.

PRODUCT DESCRIPTION:

Chip: Ntag213

Physical capacity: 180 bytes

Usable capacity: 144 bytes

Protocol: ISO14443A

Working frequency: 13.56 MHZ

Reading and writing distance: 1 to 5 cm

Reading and writing time: 1 to 2 ms

Working temperature: -20 to 55 degree, humidity of 90%

Erase times : > 100000 times

Data storage: > 10 years

Reading time: 100000 times

Diameter: 27mm

Product description

Chip: MPU-9250 Power supply: 3-5v (internal low dropout regulator) Communication: Standard IIC / SPI communication protocol 16bit AD converter-chip 16-bit data output Gyro range: ¡À 250 500 1000 2000 ¡ã / s Acceleration range: ¡À 2 ¡À 4 ¡À 8 ¡À 16g Magnetic field range: ¡À 4800uT Using Immersion Gold PCB, machine welding process to ensure quality 2.54mm pin spacing Module size 15mm X 25mm Package Included: 1 X MPU-9250 9DOF Module

Product information

Brand Name: DIYmall

Item model number: BC22781

Item Weight: 0.2 ounces

Product Dimensions: 1 x 0.1 x 0.6 inches

Item Dimensions L x W x H: 0.98 x 0.08 x 0.59 inches

Product description

Having added a pressure sensor to my Espiresso Machine, I needed an analogue input to be able to read the output voltage from the sensor. Unfortunately, the Raspberry Pi doesn’t have analogue inputs, so an external ADC is required. I settled on the Adafruit ADS1015 which has 4 inputs, 12-bit resolution, includes a programmable gain amplifier, and also uses an I2C interface:

There’s some useful information on how to set up I2C on the Pi on the Adafruit site. Having done that, there is sample code available to read the sensor from Python or C. With this, it was pretty easy to get readings from the sensor, and it seems to perform well.

The pressure sensor uses a 5V supply, and has a ratiometric output which ranges from 0.5V to 4.5V, proportional to input pressure. It has a 0-300 psi range (20.68 bar). The absolute maximum analogue input for the ADS1015 is VDD+0.3V. If we are running the ADS1015 from 3.3V for compatibility with the Pi I2C voltage levels, this limits the analogue input voltage 3.6V maximum.

Theoretically, the Ulka EP5 pump can develop up to 15 bar pressure, although this is limited by the OPV in the machine to 9~10 bar. If we assume the maximum pressure is 10 bar, and the response is linear, this would result in a maximum output voltage of:

4V x (10/20.68) + 0.5V = 2.4V

So it seems that for normal use, the output voltage should be below the maximum analogue input voltage limit of 3.6V. Even if we assume peak pressure of 15 bar is possible, that would be a maximum output voltage of:

4V x (15/20.68) + 0.5V = 3.4V

Based on these calculations the current plan is to interface the pressure sensor directly to the ADS1015.

The next step was to interface the board to the Pi in the Espiresso. Unfortunately, the SCL and SDA pins on my Pi are already used as inputs to read the two front panel buttons on the machine (using one GPIO per button). Also, almost all the other GPIOs are in use, so there was no free GPIO available to relocate the buttons.

To make the SCL and SDA lines available for the ADC, I decided to use a resistor ladder to read the buttons. This will make it possible to use a single analogue input to read all the buttons.

I’m also planning to use an opto-coupler to signal the Pi when the brew (pump) switch is switched on. Since that has an open collector NPN output, I plan to connect that to the resistor ladder also, so that it can be treated as another button input.

The pressure sensor and button input will only use 2 of the 4 analogue inputs, so there will be some inputs spare for future use.

SKU: 51_N1000351001292

The HC-12 is a half-duplex 20 dBm (100 mW) transmitter paired with a receiver that has -117 dBm (2×10-15 W) sensitivity at 5000 bps. Paired with an external antenna, these transceivers are capable of communicating up to and possibly slightly beyond 1 km in the open and are more than adequate for providing coverage throughout a typical house.

The Si4463 Transceiver The Si4463 provides the wireless communication in this circuit. It has a maximum transmit power of 20 dBm (100 mW) and receive sensitivity of -129 dBm. Two 64-byte Rx and Tx FIFO memories are built into the chip along with a great many advanced features that are not implemented in the HC-12 design. See the datasheet for more information on multiband operation, frequency hopping, etc. The STM8S003FS Microcontroller This is an 8-bit microcontroller with 8 kB of flash memory, 128 bytes of EEPROM, and a 10-bit ADC. It supports UART, SPI, and I²C and has multiple I/O pins. It offers many of the same capabilities as its ATMega and XMC counterparts. It is programmed to control the Si4463 as well as handle the UART communication between the HC-12 and whatever it is connected to on the other end. The HC-12 Transceiver Module Combined with other components, the Si4463 and STM8S003 create the HC-12 transceiver, which provides a 4-pin TTL-level UART interface (Vcc, Gnd, Tx, Rx), with a 5th pin that is used to enter "command" mode for changing the module's configuration. The HC-12 has 100 supported channels spaced 400 kHz apart, eight transmit levels, eight supported baud rates, and three different working modes. The 5th pin on the HC-12 is labeled "Set" and, when driven to logic low, allows various settings to be selected on the HC-12 using AT commands sent to the "RXD" pin. The default configuration of the HC-12 is FU3—on Channel 1, FU3 is a fully automatic and transparent (to other devices) setting that adapts to the transmission rate of the connected device (although 9600 baud is still required to program it in Command mode). Note that as the transmission rate increases, the sensitivity of the receiver decreases. You can return to the default state by sending AT+DEFAULT once in command mode.

1. product brief: BT835 is based on a Bluetooth module CSR BC8 chip BC8635, it integrates almost all Bluetooth peripheral components, and optimize RF and audio performance module, provides an easy to use solution for Bluetooth product design. Applications are mainly located in the Bluetooth stereo speakers, such as Bluetooth, Bluetooth Car Kit, Bluetooth Headset etc..

3, characteristics: - a high degree of integration, high performance, low power consumption - support A2DP, AVRCP, HSP, HFP protocol framework - meet the Bluetooth v4.0 specification - high replacement of high, fully compatible with the Bluetooth Module Division I other Bluetooth chip, no need to change the design of a direct replacement - 3/5 a key input (switch / pairing / answer / hang up, play / pause, volume +, volume, the song, the next song) - using the built-in DSP chip can achieve echo cancellation, environmental noise elimination, sound and other functions of EQ regulation - module with antenna, good consistency with RF distance - 128K EEPROM - the USB sound card function - AUX-IN input switching function 3 applications - stereo Bluetooth Headset Body - stereo Bluetooth speaker - the Bluetooth hands-free Need module data, with reference to the application, development tools, please contact the owner. This module shipments to write the default software, the software function is described as follows, if there are other special requirements, please contact the owner.

8635 software description:

1 buttons: 6 buttons, MFB, PLAY, VOL+, VOL-, PREV, NEXT. Key functions as follows; MFB: boot, shutdown state long press 1S Shutdown, boot state long press 3S shutdown Enter pairing mode, shutdown mode press 5S. (after the boot does not let go) Function: Click to answer phone calls, long press to reject; call click hang, long press toggle mobile phone and Bluetooth; double click the redial. PLAY: play / pause VOL+: volume plus VOL-: the volume reduction PREV: the last song NEXT: the next song

2 LED: boot blue long bright light 1S, shut down a long red light 1S standby blue light 5S flash once, the connection state blue light 2S flash once, pairing state, red and blue flashing alternately, charging red light, full of brilliant blue lamp.

3 USB card function

4 AUX-IN switching function

5 3.4V 3.0V low battery alarm, automatic shutdown

6 the maximum charge current is set to 200MA

7.5 minutes without connecting the automatic shutdown

8 IPHONE power display

Buyers please note:

1 this module is semi-finished module, you need to configure the external circuit to use, see the link below the reference circuit 2 .Audio output module for differential output, can not be directly connected with an amplifier, circuit needs into non differential signal, of course if amplifier support can be directly connected with an amplifier IC. 3.The module of the software has two kinds, one kind is the key to boot, suitable for battery powered occasions; one is electrically powered, adapted to the ordinary power supply occasions to use the kind of software, please note. 4.The module requires a knowledge of iron welding technology and electronic technique, if does not have this condition, is likely to be a good module to your hand will become a waste, please take caution. 5.A voltage of IO the highest resistance to 1.8V module only, more than 1.8V burning module may, please note. 6.Bluetooth module are very sensitive to static and electric leakage, please use the constant temperature soldering iron.

Package includes:

1PCS Bluetooth 4.0 Stereo Audio Module Control Chip CSR8635 Stereo Bluetooth Module

Product Description:

overview

The ML8511 breakout is an easy to use ultraviolet light sensor. The MP8511 UV (ultraviolet) sensor works by outputting an analog signal in relation to the amount of UV light thats detected. This breakout can be very handy in creating devices that warn the user of sunburn or detect the UV index as it relates to weather conditions. This sensor detects 280~390nm light most effectively. This is categorized as part of the UVB (burning rays) spectrum and most of the UVA (tanning rays) spectrum. It outputs a analog voltage that is linearly related to the measured UV intensity (mW/cm2). If your microcontroller can do an analog to digital signal conversion then you can detect the level of UV!

Product Description:

Description:

1, support CAN V2.0B specification, the communication speed 1Mb / S

2,0 to 8-byte data field

3, the standard frame and expand the frame and remote frame

4. 5V DC power supply module, SPI interface protocol control

5,120 ohm termination resistors. Impedance matching, ensure drive capacity, long-distance data transmission against signal radiation

6, module size: 4.4cm x 2.8cm screw hole center spacing 23mm x 38mm

7, the working current: typ. 5mA, 1 microamp standby current. Except the power indicator.

8, the working temperature: Industrial grade to 85 ℃ -40 ℃

Description:

Specification:

Product description

The development board is based on the WiFi-SoC ESP8266 and is made for fast Internet-of-Things (IoT) prototyping. It is flashed with the NodeMCU firmware and can be set up and programmed right away with the on-board microUSB connection. With only few lines of code the NodeMCU Dev Kit is connected to your local network and ready to be controlled by other network members like computers and smartphones. The D1 mini is a mini wifi board based on ESP-8266EX. Features: -11 digital input/output pins, all pins have interrupt/pwm/I2C/one-wire supported(except D0) -1 analog input (3.3V max input) -A Micro USB connection -Check out the sample Lua commands on the: https://github.com/nodemcu/nodemcu-firmware -Compatible with: https://github.com/esp8266/Arduino -Compatible with: http://nodemcu.com/index_en.html Package included: 1 x D1 Mini 2 x Lange Weibliche Pins 2 x Kurze Weibliche Pins 2 x Normal Pins

Obstacle Detector Sensor, Line Following Sensor, Proximity Sensor 10-12cm range. Potentiometer for maximum range setting. Can be used to differentiate between black and white (Can be used for line sensing) Onboard LED indication for detection Works on 5V or 3.3V input. TTL compatible output

DESCRIPTION

For microcontrollers without an analog-to-digital converter or when you want a higher-precision ADC, the ADS1115 provides 16-bit precision at 860 samples/second over I2C. The chip can be configured as 4 single-ended input channels, or two differential channels. As a nice bonus, it even includes a programmable gain amplifier, up to x16, to help boost up smaller single/differential signals to the full range. We like this ADC because it can run from 2V to 5V power/logic, can measure a large range of signals and its super easy to use. It is a great general purpose 16 bit converter.

The chip's fairly small so it comes on a breakout board with ferrites to keep the AVDD and AGND quiet. Interfacing is done via I2C. The address can be changed to one of four options (see the datasheet table 5) so you can have up to 4 ADS1115's connected on a single 2-wire I2C bus for 16 single ended inputs.

To get you started, we have example code for both the Raspberry Pi (in our Adafruit Pi Python library) and Arduino (in our ADS1X15 Arduino library repository) Simply connect GND to ground, VDD to your logic power supply, and SCL/SDA to your microcontroller's I2C port and run the example code to start reading data.

DESCRIPTION

Using USB2.0 FT232RL chip, USB power supply with overcurrent protection, 500MA resettable fuse to protect your computer and device! More stable performance! ! This product uses a new design, and convert the USB serial port. By plugging the jumper cap to free choice of 3.3V and 5V TTL level, by the spontaneous self-closing 10W byte test by the factory before! ! Introduction FT232R With the development of computer technology, the parallel port and the serial port on the PC slowly disappear, even desktops are now rare in the parallel port. But for the engineers, parallel and serial interfaces are essential, especially serial. For computers without a serial port, the most convenient solution is to use a USB to serial chip virtual serial out, many manufacturers have produced such a chip, such as silicon LABS CP210x series, TI TUSB3410, Nanjing Qinheng CH34x Series FTDI's FT232 series, Prolific PL230x series, acco ARK3116 more. Stability perspective, or FT232 series the most reliable, the debugger can use it to feel at ease and not have to worry about the blue screen appears. FT232R chip is a single-chip solution, generally use the basic need peripherals, and even crystal, the USB matching resistor, place the product information EEPROM are already integrated in-house. FT232R as well as some of the more useful features of the specific details can refer to the FT232R the data manual

DESCRIPTION

Feature: - Small size, easy to use. - Compatible with bread board - Power supply voltage: normally ±9V dual power supply, minimum voltage is ±3.5V Package included: 1 x EMG Sensor 1 x Professional EMG Cable 3 x Disposable Surface Electrode

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DESCRIPTION

Heart beat sensor is designed to give digital output of heat beat when a finger is placed on it. When the heart beat detector is working, the beat LED flashes in unison with each heart beat. This digital output can be connected to microcontroller directly to measure the Beats Per Minute (BPM) rate. It works on the principle of light modulation by blood flow through finger at each pulse.

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DESCRIPTION

The PCA9532 is a 16-bit I2C-bus and SMBus I/O expander optimized for dimming LEDs in256 discrete steps for Red/Green/Blue (RGB) color mixing and back light applications.The PCA9532 contains an internal oscillator with two user programmable blink rates andduty cycles coupled to the output PWM. The LED brightness is controlled by setting theblink rate high enough (> 100 Hz) that the blinking cannot be seen and then using the dutycycle to vary the amount of time the LED is on and thus the average current through the LED

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Features

8 channels bidirectional voltage translation between different logic level, translate between Ax and Bx automatically 4 pairs of power supply interfaces, supports more situations Use tantalum capacitors for power filter, provides more stability Voltage level: 1.8V-6V Dimension: 31.6mm x 25.4mm

Features

Description GP2Y1010AU0F is a dust sensor by optical sensing system.An infrared emitting diode (IRED) and an phototransistor are diagonally arranged into this device. It detects the reflected light of dust in air. Especially, it is effective to detect very fine particle like the cigarette smoke. Compact, thin package (46.0 × 30.0 × 17.6 mm) Low consumption current (Icc: MAX. 20 mA) The presence of dust can be detected by the photometry of only one pulse Enable to distinguish smoke from house dust Lead-free and RoHS directive compliant In addition it can distinguish smoke from house dust by pulse pattern of output voltage. Technical parameters: Avg Current Consumption- 11 Functionality- ANALOG Response Time- .28ms Sensitivity- 0.5 V/0.1 cu mg Vcc- 5 Vout- 0.9

Features

"Product Specification 100% brand new Module main technical parameters: 1.Working Voltage : 5V(DC) 2.Static current: Less than 2mA. 3.Output signal: Electric frequency signal, high level 5V, low level 0V. 4.Sensor angle: Not more than 15 degrees. 5.Detection distance: 2cm-450cm. 6.High precision: Up to 0.3cm 7.Input trigger signal: 10us TTL impulse 8.Echo signal : output TTL PWL signal Mode of connection: 1.VCC 2.trig(T) 3.echo(R) 4.GND Use method: Supply module with 5V, the output will be 5V while obstacle in range, or 0V if not.The out pin of this module is used as a switching output when anti-theft module, and without the feet when ranging modules. Note : the module should be inserted in the circuit before been power, which avoid producing high level of misoperation;if not, then power again. Module Working Principle: 1.Adopt IO trigger through supplying at least 10us sequence of high level signal. 2.The module automatically send eight 40khz square wave and automatically detect whether receive the returning pulse signal. 3.If there is signals returning, through outputting high level and the time of high level continuing is the time of that from the ultrasonic transmitting to receiving. Test distance = (high level time * sound velocity (340M/S) / 2. Note : This module is not suitable to connect with electric power, if you need to connect this module with electronic power,then let the GND terminal of this module to be connected first,otherwise, it will affect the normal work of the module Package Include 1 x Ultrasonic Sensor"

PRODUCT DFESCRIPTION:

NeuroSky ThinkGear ASIC Module(AM) is the world’s most popular EEG technology. Together with a dry electrode, it senses the faint signal from the human brain, filters out extraneous noise and electrical interference and converts to digital to power games, apps, toys, and research. The embedded ASIC within the TGAM is truly a system on chip; programmed with NeuroSky eSense, A/D, amplification off-head detection and noise filtering for EMG and 50/60Hz AC.

FEATURES

Direct connect to dry electrode One EEG channel + Reference + Ground Extremely low-level signal detection Advanced filter with high noise immunity RAW EEG at 512Hz