Oscilloscope-Triggered Sweep using 555 IC

We can use the 555 timer to hold the cost down of adding a triggered sweep to an economy oscilloscope. The timer is triggered by the circuit’s input op amp, adjusting its flip-flop and cutting off its discharge transistor so that capacitor C can charge. The flip-flop resets and the transistor conducts when capacitor voltage reaches the timer’s control voltage […]

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Car Tachometer with 555 IC

Pulses are received by the timer from the distributor points. When the timer output is high, Meter M receives a calibrated current through R6. The meter don’t receives any current for that part of the duty cycle after time-out. A visible indication of engine speed is provided by integration of the variable duty cycle by the meter movement. Here’s the […]

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AD589-Dual Supply LVDT Signal Conditioner Design Procedure

LVDT (linear voltage differential transformer) is widely used as linear position sensor.  AD589 integrated circuit provides a complete solution for LVDT signal conditioner circuit. This circuit diagram below shows the connection method with dual +- 15 volt power supplies and a Schaevitz E100 LVDT: The design procedure on how to select the proper components values is shown in the datasheet […]

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