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Description： 1 .Chip : BH1750FVI 2. Power supply: 3v-5V power 3. Light range: 0-65535 lx 4. Sensor built-in: 16 bitAD converter 5. Direct digital output, bypassing the complex calculation, bypassing the calibration 6. Don't distinguish between ambient light 7. Close to the spectral characteristics of visual acuity 8. Widely use to 1-lux high precision measurement 9. Standard IIC communication agreement

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Description： Description: 100% Brand new and high quality Size: Approx. 42mm x 20mm x 10mm Full load Temperature rise: 40 Load Regulation: ± 0.5% Voltage Regulation: ± 0.5% Dynamic Response speed: 5% 200uS Input voltage: 3-32V Input current: Max 4A Output voltage: 5-35V(Adjustable) Output current: Rated current is max 4A, that's according to the input No load consumption: 18mA (5V input, 8V output, no-load is less than 18mA. Higher the voltage, the greater the load current.) Conversion Efficiency: Up to 92% (output voltage higher, the higher the efficiency) Switching Frequency: 150KHz Rectifier: Non-Synchronous Rectification Module Properties: Non-isolated booster step up module Short Circuit Protection: NONE Operating Temperature: Industrial grade (-40 to +85 ) (output power 10W or less) Package Included: 1PCS x DC-DC Adjustable Step-up Power Converter Module XL6009

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Description： Features: JDY-31 Bluetooth-compatible is based on Bluetooth-compatible 3.0 SPP design, which can support Windows, Linux, for android data transmission, working frequency 2.4GHZ, modulation mode GFSK, maximum transmission power 8db, maximum transmission distance 30 meters, support users to modify device name through AT command The baud rate and other instructions are convenient and quick to use. This Bluetooth-compatible module can only be used as a Bluetooth-compatible slave. JDY-31 is a classic Bluetooth-compatible protocol that can communicate with Bluetooth-compatible-enabled computers (desktops, notebooks) and mobile phones (for android). ? Windows computer Bluetooth-compatible serial port transparent transmission ? For Android Bluetooth-compatible serial port transparent transmission ? Smart home control ? Automotive ODB testing equipment ? Bluetooth-compatible toy ? Share mobile power, share weight ? Medical equipment Parameters: ? Model: JDY-31 ? Bluetooth-compatible version: Bluetooth-compatible 3.0 SPP ? Working frequency band: 2. 4GHZ ? Communication interface: UART ? STM connection temperature: <260 degree ? Operating voltage: 1.8-3.6V (3.3v recommended) ? Operating current not connected: 4. 7mA ? Working temperature: -40~80 degree ? Current after BLE connection: 7.3mA ? Antenna: Built-in PCB antenna ? Transmit power: 8db (Max) ? High transmission distance: 30 meters ? Receive sensitivity: -97dbm ? Master-slave support: slave ? SPP maximum throughput: 16K bytes/s (for android, windows) JDY-31 support patch and solder pin header Needle pin application: The pin header specification is standard 2.54 pitch pin header, just need to weld 5 pin holes on the module. SMD application: Generally, only four pins of VCC, GND, RXD and TXD need to be connected. If you need to disconnect actively in the connection state, send AT+DISC in the connection state.

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Description： 1. Circuit board size:Diameter: 50mm 2. Circuit board material: Single- -sided 1 .6mm FR-4 3. Voltage: 5V 4. LED aty: 10pcs of 5mm LED 5. LED color: green, blue, white, red, yellow

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Description： The LM317 large integrated circuit manufacturers have similar products to choose from, and are a widely used series of integrated regulators. The output voltage range of the LM317 is 1.25V-37V (the design output voltage range of this kit is 1.25V-12V), and the load current is up to 1.5A. Its use is very simple, only two external resistors are needed to set the output voltage. In addition, its linear regulation and load regulation are better than standard fixed voltage regulators. The LM317 has built-in protection circuits such as overload protection and safety zone protection. To ensure the output performance of the regulator, R should be less than 240 ohms. The regulated voltage value can be adjusted by changing the RP resistance. D5, D6 are used to protect the LM317. Output voltage calculation formula: Uo = (1 + RP / R) * 1.25 Performance parameter 1. Product name: LM317 adjustable DC regulated power supply module 2. Chip model: LM31 7 3. Output voltage: 1 .25V-22V continuously adjustable 4. Typical linear adjustment: 0.01% 5. Typical load adjustment rate: 0.1% Ripple rejection ratio :80dB 6. Operating ambient temperature: -10°C +85°C 7. Storage ambient temperature: -65°C +150°C 8. Operating status: With power indicator 9. Size of finished plate: 63* 40*27mm(without potentiometer handle) 10. Internal chip with overheating, overcurrent, short circuit protection circuit

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