Free Simple Circuit Diagram
RS 232 line to 5 V converter circuit schematic diagram is shown on the following figure. The MAX680 is normally used as a charge pump voltage converter. This converter can convert +5 V to ±10V. The MAX 680 works in reverse in this circuit. That means MAX 680 converter the RS 232 signal levels to a lower voltage. The output […]
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This pyrometer is used to measure an incandescent body. The principle for this measurement is that the hotter the body, the spectrum of the radiation will contain more shorter wavelength (visible light). This circuit use infrared filter to separate the visible and infrared spectrum, since the sensor (photodiode) is sensitive for both visible and infrared spectrum. Here is the schematic […]
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Current loop transmitter is the term associated with sensor system that is used in industrial 4-20mA current loop technology. This transmitter contain the signal conditioning circuit for the sensor (chromel-alumel thermocouple), and a current regulator to maintain the current loop to consistently represents the sensor reading. Here is the schematic diagram of the circuit: When dealing with thermocouple, the feature […]
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The UHF motion detector below operates on the Doppler radar principle. A radial signal is created by the oscillator (Q1). Some of this energy is reflected back to the generator by an object in the radiated field. The reflected signal will have a different frequency because of Doppler shift if the object is moving. Q1 is an oscillator coupled to […]
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