Checkpoint LAB USB-RS232 Manual do Utilizador descarregar pdf (Página 8)

LEVEL SHIFTER

• Needed for multiple voltage devices. That is, when mixing CMOS, TTL

and other IC devices, the threshold voltage levels will be different.

• Don’t make your own, buy an IC to get the correct level thresholds.

• Independent of V

and V

• Offers precise switching thresholds.

• Check for mono or bi-directional needs.

• Some have fixed Vcc values some are not.

• Typical example - Single-Supply Voltage Translator

• 1.8 V to 3.3 V (at VCC = 3.3 V)

• 2.5 V to 3.3 V (at VCC = 3.3 V)

• 1.8 V to 2.5 V (at VCC = 2.5 V)

• 3.3 V to 2.5 V (at VCC = 2.5 V)

PRESSURE TRANSDUCER

• Wide range of forces available.

• As low as finger touch, to load cell in tons.

• Measure liquid, gas, touch force.

• Piezoelectric materials is common.

• Recommendation: Know your

environment, range & precision and go

shopping! Circuits are simple and readily

available.

• There are numerous manufactures. Start

with Mouser, DigiKey, McMaster-Carr.

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Checkpoint LAB USB-RS232 Manual do Utilizador Página 8