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1-8S Lipo Battery Voltage Tester / Low Voltage Buzzer Alarm.
This is a great two in one tool that gives a loud alarm at low voltage and can quickly display battery voltage. Simply plug a 1-8s battery’s balance connector into the voltage meter/buzzer. You will receive an instant readout of the total voltage and an individual reading of each cell.
Features:
3W Output at 10% THD with a 4Ω Load and 5V Power Supply
Filterless, Low Quiescent Current and Low EMI
Low THD+N
Superior Low Noise
Efficiency up to 90%
Short Circuit Protection
Thermal Shutdown
Few External Components to Save the Space and Cost
Pb-Free Package
Details
For plug-in test boards, the 3.3V and 5V power supplies
have jumper to adjust the desired power. Supports 9V
battery jacks, 6.5 – 12V input power adapter, or
power supply. Access via USB via Mini USB
cable is small space wasted experiment board.
FEATURES:
– Breadboard power supply module, compatible with 5 V, 3.3 V
– Input voltage: 6.5-12 V (DC) and USB power supply output
– Output voltage: 3.3V/5V can switch over
– Maximum output current: <700 ma
– Two rail independent control, can switch over to 0 V, 3.3 V, 5 V
– On-board two groups of 3.3V, 5V DC output plug pin, convenient external lead use
Low Power High Performance 2.4 GHz GFSK Transceiver
Features
2400-2483.5 MHz ISM band operation
Support 250Kbps, 1Mbps and 2 Mbps air data rate
Programmable output power
Low power consumption
Tolerate +/- 60ppm 16 MHz crystal
Variable payload length from 1 to32bytes
Automatic packet processing
6 data pipes for 1:6 star networks
1.9V to 3.6V power supply
4-pin SPI interface with maximum 8MHz clock rate
Compact 20-pin 4x4mm QFN package
RFID Card Reader Module (RC-522)
Specification:
Module Name: RC-522
Working current: 13—26mA/ DC 3.3V
Working frequency: 13.56MHz
Standby Current: 10-13mA
Standby Voltage: DC 3.3V
sleeping Current: <80uA
Peak Current: <30mA
Card reading distance: 0~60mm(mifare1 card)
Data communication speed: Maximum 10Mbit/s
Protocol: SPI
RTC module ds3231.
The DS3231 is a low-cost, extremely accurate I2C real-time clock (RTC) with an integrated temperature-compensated crystal oscillator (TCXO) and crystal. The device incorporates a battery input, and maintains accurate timekeeping when main power to the device is interrupted. The integration of the crystal resonator enhances the long-term accuracy of the device as well as reduces the piece-part count in a manufacturing line.
FEATURES:
– SD Card module can make your SD application more easier and simple.
– It is easily interfaced as a peripheral to your arduino sensor shield module.
– Through programming, you can read and write to the SD card using your arduino.
– Can be used for SD Card more eaisly, such as for MP3 Player, MCU/ARM system control.
– All SD SPI pins output, MOSI, SCK, MISO and CS.
– Support 5V/3.3V input.
n High sensitivity due to integrated low-noise RF input amplifier
n FM mixer for conversion to IF of the US/Europe (87.5 MHz to 108 MHz) and Japanese
(76 MHz to 91 MHz) FM band
n Preset tuning to receive Japanese TV audio up to 108 MHz
n RF Automatic Gain Control (AGC) circuit
n LC tuner oscillator operating with low cost fixed chip inductors
n FM IF selectivity performed internally
n No external discriminator needed due to fully integrated FM demodulator
n Crystal reference frequency oscillator; the oscillator operates with a 32.768 kHz clock
crystal or with a 13 MHz crystal and with an externally applied 6.5 MHz reference
frequency
n Phase-locked loop (PLL) synthesizer tuning system
n I2C-bus and 3-wire bus, selectable via pin BUSMODE
n 7-bit IF counter output via the bus
n 4-bit level information output via the bus
n Soft mute
n Signal dependent mono to stereo blend [Stereo Noise Cancelling (SNC)]
n Signal dependent High Cut Control (HCC)
n Soft mute, SNC and HCC can be switched off via the bus
n Adjustment-free stereo decoder
n Autonomous search tuning function
n Standby mode
n Two software programmable ports
n Bus enable line to switch the bus input and output lines into 3-state mode
Touch sensor module
The module is based on a touch-sensing IC (TTP223B) capacitive touch switch module. In the normal state, the module output low, low power consumption; When a finger touches the corresponding position, the module output high, if not touched for 12 seconds, switch to low-power mode.
Features:
Low power consumption
Power supply for 2 ~ 5.5V DC
Can replace the traditional touch of a button
Four M2 screws positioning holes for easy installation
Specification:
Power supply voltage VCC: 2V/3V/5.5V
Output high VOH: 08 Vcc
Output low VOL: 0.3 Vcc
Output Pin Sink Current (VCC = 3V, VOL = 0.6V): 8mA
Output pin pull-up current (VCC = 3V, VOH = 2.4V): 4mA
Response time (low power mode): 220mS
Response time (touch mode): 60mS
SD card voice module
Model no: WTV020-SD-16
Features:
1. It is an OTP(one time programmable) VOICE-CHIP.
2. ItsOperating voltage:2.5V-3.6V.
3. WTV010 with 10seconds , WTV020 with 20seconds duration at 6KHz .
4. Its sampling rate supported form 6KHz ,8KHz,10KHZ …. 32KHz max.
5. It has higher sampling rate better sound quality and shorter duration.
6. It is with DAC and PWM audio output .
7. DAC output connect to amplifier . PWM output can direct a 0.5W/8ohms speaker.
8. It is equipped with 16 bits DAC Mute will not take up any memory space.
9. The same voices can be re-use and will not take up memory space.
10. Multiple control modes: keymode(keyboard), parallel (COM+SBT), one line serial , two lines serial , three lines serial.
11. Quiescent current 2uA.
12. Support WAV ,16Bit, mono format.
13. Equip with PC software for project editing.
VOICE RECOGNITION KIT (SR-07)
Features of the kit include:
1. Self-contained stand alone speech recognition circuit
2. User programmable
3. 40 or 20 word vocabulary
4. Multi-lingual
5. Non-volatile memory back up
6. Easily interfaced to control external circuits & appliances
7. Speech recognition will become the method of choice for controlling appliances, toys, tools and computers. At its most basic level, speech controlled appliances and tools allow the user to perform parallel tasks (i.e. hands and eyes are busy elsewhere)while working with the tool or appliance.
8. The heart of the circuit is the HM2007 speech recognition IC.The IC can recognize either 40 words, each word a length of .96 seconds or 20 words, each word a length of 1.92 seconds.