Size: 38mm (length) * 22mm (W) * 14mm (height)
Operating voltage :3.3 - 5 .5 V
Clock chip: high-precision clock chip DS3231
Clock Accuracy :0-40 ℃ range, the accuracy 2ppm, the error was about 1 minute
Calendar alarm clock with two
Programmable square-wave output
Real time clock generator seconds, minutes, hours, day, date, month and year timing and provide valid until the year 2100 leap year compensation
Chip temperature sensor comes with an accuracy of ± 3 ℃
Memory chips: AT24C32 (storage capacity 32K)
IIC bus interface, the maximum transmission speed of 400KHz (working voltage of 5V)
Can be cascaded with other IIC device, 24C32 addresses can be shorted A0/A1/A2 modify default address is 0x57
With rechargeable battery LIR2032, to ensure the system after power failure, the clock move any natural normal
Wiring instructions (with Arduino uno r3 for example):
SCL → A5
SDA → A4
VCC → 5V
GND → GND
Fixed plate using carbon fiber materials using the N45 high performance magnet.
The center fixed shaft maglev way to test products to ensure a balance of zero resistance.
Applicable to any size and 80 grams or less fixed-wing propeller.
Model: propeller balancer (magnetic levitation)
Material: Carbon fiber
Bag size: 6 * 5.5 * 4.5cm / 2.4 * 2.2 * 1.8 (per bag)
Weight: 46g / 1.6oz
This is a 20 character by 4 line display that runs at 5.0V.Includes Blue LED backlight. Utilizes the common SPLC780D(Superior to KS0066U)parallel interface (datasheet).
Interface code is widely available for many different controllers and systems. If you used Arduinos board, just load the Example from Arduinos LiquidCrystal Library.
A total of six pins (GND, VCC, MISO, MOSI, SCK, CS), GND to ground, VCC is the power supply, MISO, MOSI, SCK is the SPI bus, CS is the chip select signal pin
3.3V regulator circuit:
LDO regulator output 3.3V as level converter chip, Micro SD card supply.