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DC Barrel Jack ( female) is a 5
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The MQ-8 can detect hydrogen gas concentrations anywhere from 100-10000ppm
features :
You can connect this board directly to 5V systems (5V power in to VCC) and the SDA and SCL pins will be at 5V levels
74HC30D (8-Input NAND Gate) RS232 Converter DC Barrel Jack ( female)Introduction : 74HC30 is an 8 input NAND gate. Inputs include clamp diodes. This enables theuse of current limiting resistors to interface inputs to voltages in excess of VCC. Features : Logic Type: (8 Input NAND Gate, Supply Voltage Range: 2V to 6V. High noise immunity. Logic Case Style: DIP. No. of Pins: 16. Operating Temperature Range: 40C to +125C.
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