transceiver-circuits
While developing an infrared (IR) extender circuit, a method was needed to measure the relative intensities of different infrared light sources. This circuit utilizes an SFH2030 photodiode as the infrared sensor. A CA3140 MOSFET operational amplifier is employed in differential mode to amplify the current pulses from the photodiode. An ordinary colored LED (LED1) illuminates when infrared radiation is detected. The output from the op-amp, pin 6, can be connected to a multimeter configured to read DC voltage. The strength of infrared remote controls can be compared based on the multimeter reading; a higher reading indicates a stronger infrared light. Tests were conducted by aiming various remote controls at the sensor from approximately one meter away. For each microamp of current through the photodiode, about one volt is generated at the output. Operational amplifiers such as the 741 or LF351 are not suitable for this circuit. Although a 12-volt power supply is used, a 9-volt battery can also be employed.
The infrared extender circuit is designed to measure the intensity of infrared light emitted from various sources, specifically remote controls. The SFH2030 photodiode acts as the primary sensor, detecting the infrared radiation and converting it into a corresponding electrical current. The CA3140 operational amplifier, configured in differential mode, significantly amplifies the small current signals generated by the photodiode. This amplification is critical as the output needs to be within a measurable range for accurate readings.
The circuit includes an LED indicator (LED1) that provides a visual cue when infrared radiation is detected, enhancing usability and feedback during operation. The output from the op-amp is fed into a multimeter, which is set to measure DC voltage. This setup allows users to compare the strength of different infrared signals based on the voltage output, where each microamp of current corresponds to approximately one volt at the output.
The choice of the CA3140 operational amplifier is important, as other common op-amps like the 741 or LF351 do not meet the performance requirements of this circuit. The circuit can operate effectively with a 12-volt power supply, but a 9-volt battery can also suffice, making it versatile for different power supply options.
In practical applications, the circuit can be utilized to assess the efficacy of various infrared remote controls, providing a straightforward method for users to evaluate and compare the performance of these devices based on their emitted infrared intensity. This functionality is particularly useful in settings where the strength of remote control signals is critical, such as in home automation systems or electronic device troubleshooting.As I was developing my IR Extender Circuit, I needed to find a way of measuring the relative intensities of different Infra red light sources. This circuit is the result of my research. I have used a photodiode, SFH2030 as an infra red sensor. A MOSFET opamp, CA3140 is used in the differential mode to amplify the pulses of current from the photodi
ode. LED1 is an ordinary coloured led which will light when IR radiation is being received. The output of the opamp, pin 6 may be connected to a multimeter set to read DC volts. Infra red remote control strengths can be compared by the meter reading, the higher the reading, the stronger the infra red light. I aimed different remote control at the sensor from about 1 meter away when comparing results. For every microamp of current through the photodiode, about 1 volt is produced at the output. A 741 or LF351 will not work in this circuit. Although I have used a 12 volt power supply, a 9 volt battery will also work here. 🔗 External reference
The infrared extender circuit is designed to measure the intensity of infrared light emitted from various sources, specifically remote controls. The SFH2030 photodiode acts as the primary sensor, detecting the infrared radiation and converting it into a corresponding electrical current. The CA3140 operational amplifier, configured in differential mode, significantly amplifies the small current signals generated by the photodiode. This amplification is critical as the output needs to be within a measurable range for accurate readings.
The circuit includes an LED indicator (LED1) that provides a visual cue when infrared radiation is detected, enhancing usability and feedback during operation. The output from the op-amp is fed into a multimeter, which is set to measure DC voltage. This setup allows users to compare the strength of different infrared signals based on the voltage output, where each microamp of current corresponds to approximately one volt at the output.
The choice of the CA3140 operational amplifier is important, as other common op-amps like the 741 or LF351 do not meet the performance requirements of this circuit. The circuit can operate effectively with a 12-volt power supply, but a 9-volt battery can also suffice, making it versatile for different power supply options.
In practical applications, the circuit can be utilized to assess the efficacy of various infrared remote controls, providing a straightforward method for users to evaluate and compare the performance of these devices based on their emitted infrared intensity. This functionality is particularly useful in settings where the strength of remote control signals is critical, such as in home automation systems or electronic device troubleshooting.As I was developing my IR Extender Circuit, I needed to find a way of measuring the relative intensities of different Infra red light sources. This circuit is the result of my research. I have used a photodiode, SFH2030 as an infra red sensor. A MOSFET opamp, CA3140 is used in the differential mode to amplify the pulses of current from the photodi
ode. LED1 is an ordinary coloured led which will light when IR radiation is being received. The output of the opamp, pin 6 may be connected to a multimeter set to read DC volts. Infra red remote control strengths can be compared by the meter reading, the higher the reading, the stronger the infra red light. I aimed different remote control at the sensor from about 1 meter away when comparing results. For every microamp of current through the photodiode, about 1 volt is produced at the output. A 741 or LF351 will not work in this circuit. Although I have used a 12 volt power supply, a 9 volt battery will also work here. 🔗 External reference