BXRA-W0240

Electronics News

• Precision current source is software-programmable
  With the addition of a few inexpensive miniature components, the hard-wired, voltage-controlled current source of yesterday becomes a software-programmable voltage-controlled current source...
• Gain-of-two instrumentation amplifier uses no external resistors
  An instrumentation amplifier offers precise gain without feedback resistors, and, at any value of gain, it provides high input impedances at its noninverting and inverting inputs. In a typical IC instrumentation amplifier, a single resistor...
• LED drivers minimize power dissipation
  One option for driving high-brightness LEDs uses the standard stepdown buck converter. The sense resistor, RS, generates a feedback voltage, VFB, that sets the desired LED current...
• One-wire bus powers water-level sensor
  You can use the simple sensor circuit to remotely monitor the level of liquid water in a vessel such as a swimming pool. The LMC555 sensor oscillator provides an output-signal frequency that is a function of the water level...

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