sEMG-DAQ is a wearable 6 channel data acquisition unit for capturing surface electromyographic (sEMG) signals from human arm muscles using SJ2-3593D jack connectors while conditioning, digitizing, processing and transmitting them as sEMG data to an external AI accelerated board through an SM12B-SRSS IDC connector where AI models are run for various applications including robotic control, muscle signals medical assessment and gesture recognition. The board leverages an INA125P instrumentation amplifier together with filter stages utilizing LM324QT op-amps for conditioning and an STM32G4A1VET6 microcontroller for the digitization, processing and data transmission of the signals. Since AI models can only be as good as the data, the design of such a DAQ is necessary to ensure clean, reliable and real-time data for AI applications requiring sEMG data. The board also has USB-FS and JTAG to cater for debugging. The power (5V) is fed through a screw terminal and is regulated by two LDK320AM LDO regulators to offer 5V, 3.3V and 1.8V to meet the requirements of various components on the board.

The LM248 and LM348 quad operational amplifiers, manufactured by STMicroelectronics, incorporate four independent, high-gain internally-compensated, low-power operational amplifiers designed to provide identical functional characteristics to those of the renowned UA741 operational amplifier. These components stand out for their low supply current of 0.53 mA per amplifier and class AB output stage, ensuring no crossover distortion, which makes them highly suitable for applications demanding multiple UA741 type amplifiers and where amplifier matching or high packaging density is required. Furthermore, the LM248 and LM348 offer superior features such as low input offset voltage (1 mV), low input bias current (30 nA), and a gain bandwidth product of 1.3 MHz. They also boast excellent isolation between amplifiers (120 dB) and overload protection for inputs and outputs, enhancing their reliability and performance in various operational environments. The operational temperature ranges are from -40 °C to 105 °C for the LM248 and 0 °C to 70 °C for the LM348, catering to a broad spectrum of industrial applications. Additionally, these components are pin-compatible with LM124, LM224, LM324, further extending their applicability in electronic circuit designs.

The semgdaq board is a wearable 6 channel data acquisition unit for capturing surface electromyographic (sEMG) signals from human arm muscles using SJ2-3593D jack connectors while conditioning, digitizing, processing and feature extracting them then transmitting the feature data as vectors to an external AI accelerated board through an SM12B-SRSS IDC connector using 12C and UART communication protocals where AI models are run for various applications including robotic control, muscle signals medical assessment and gesture recognition. The feature vectors are comprised of onset detection, slope sign changes, autoregression coefficients and Short Time Fourier Transform magnitude spectrum data for each segment or window of the signals in real time. This vectors can be used as the basis for further feature extraction on more computationally resourceful hardware where machine learning algorthms can be employed for descision making in the applications mentioned earlier. The board leverages INA125P instrumentation amplifiers together with filter stages utilizing LM324QT op-amps for conditioning and an STM32G4A1VET6 microcontroller for the digitization, processing, feature extraction and data transmission. Since AI models can only be as good as the data, the design of such a DAQ is necessary to ensure clean, reliable and real-time data for AI applications requiring sEMG feature data. The board also has USB-FS and JTAG to cater for debugging and external flash memory to extend its data storage and processing capability. The power (5V) is fed through a screw terminal and is regulated by two LDK320AM LDO regulators to offer 5V, 3.3V and 1.8V to meet the requirements of various components on the board.

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Adjustable Voltage Regulator Circuit using LM324 IC with Over Current Protection

DIP825W47P254L1917H533Q14 PDIP-14 Texas Instruments LM324N 4-Channel industry standard operational amplifier 14-PDIP 0 to 70 https://pricing.snapeda.com/search/part/LM324N/?ref=eda Texas Instruments None In Stock Aliases: undefined

DIP825W47P254L1917H533Q14 PDIP-14 Texas Instruments LM324N 4-Channel industry standard operational amplifier 14-PDIP 0 to 70 https://pricing.snapeda.com/search/part/LM324N/?ref=eda Texas Instruments None In Stock Aliases: undefined

DIP825W47P254L1917H533Q14 PDIP-14 Texas Instruments LM324N 4-Channel industry standard operational amplifier 14-PDIP 0 to 70 https://pricing.snapeda.com/search/part/LM324N/?ref=eda Texas Instruments None In Stock Aliases: undefined

DIP825W47P254L1917H533Q14 PDIP-14 Texas Instruments LM324N 4-Channel industry standard operational amplifier 14-PDIP 0 to 70 https://pricing.snapeda.com/search/part/LM324N/?ref=eda Texas Instruments None In Stock Aliases: undefined

DIP825W47P254L1917H533Q14 PDIP-14 Texas Instruments LM324N 4-Channel industry standard operational amplifier 14-PDIP 0 to 70 https://pricing.snapeda.com/search/part/LM324N/?ref=eda Texas Instruments None In Stock Aliases: undefined

DIP825W47P254L1917H533Q14 PDIP-14 Texas Instruments LM324N 4-Channel industry standard operational amplifier 14-PDIP 0 to 70 https://pricing.snapeda.com/search/part/LM324N/?ref=eda Texas Instruments None In Stock Aliases: undefined

DIP825W47P254L1917H533Q14 PDIP-14 Texas Instruments LM324N 4-Channel industry standard operational amplifier 14-PDIP 0 to 70 https://pricing.snapeda.com/search/part/LM324N/?ref=eda Texas Instruments None In Stock Aliases: undefined

DIP825W47P254L1917H533Q14 PDIP-14 Texas Instruments LM324N 4-Channel industry standard operational amplifier 14-PDIP 0 to 70 https://pricing.snapeda.com/search/part/LM324N/?ref=eda Texas Instruments None In Stock Aliases: undefined

DIP825W47P254L1917H533Q14 PDIP-14 Texas Instruments LM324N 4-Channel industry standard operational amplifier 14-PDIP 0 to 70 https://pricing.snapeda.com/search/part/LM324N/?ref=eda Texas Instruments None In Stock Aliases: undefined

DIP825W47P254L1917H533Q14 PDIP-14 Texas Instruments LM324N 4-Channel industry standard operational amplifier 14-PDIP 0 to 70 https://pricing.snapeda.com/search/part/LM324N/?ref=eda Texas Instruments None In Stock Aliases: undefined

DIP825W47P254L1917H533Q14 PDIP-14 Texas Instruments LM324N 4-Channel industry standard operational amplifier 14-PDIP 0 to 70 https://pricing.snapeda.com/search/part/LM324N/?ref=eda Texas Instruments None In Stock Aliases: undefined

DIP825W47P254L1917H533Q14 PDIP-14 Texas Instruments LM324N 4-Channel industry standard operational amplifier 14-PDIP 0 to 70 https://pricing.snapeda.com/search/part/LM324N/?ref=eda Texas Instruments None In Stock Aliases: undefined

DIP825W47P254L1917H533Q14 PDIP-14 Texas Instruments LM324N 4-Channel industry standard operational amplifier 14-PDIP 0 to 70 https://pricing.snapeda.com/search/part/LM324N/?ref=eda Texas Instruments None In Stock Aliases: undefined

DIP825W47P254L1917H533Q14 PDIP-14 Texas Instruments LM324N 4-Channel industry standard operational amplifier 14-PDIP 0 to 70 https://pricing.snapeda.com/search/part/LM324N/?ref=eda Texas Instruments None In Stock Aliases: undefined

DIP825W47P254L1917H533Q14 PDIP-14 Texas Instruments LM324N 4-Channel industry standard operational amplifier 14-PDIP 0 to 70 https://pricing.snapeda.com/search/part/LM324N/?ref=eda Texas Instruments None In Stock Aliases: undefined

DIP825W47P254L1917H533Q14 PDIP-14 Texas Instruments LM324N 4-Channel industry standard operational amplifier 14-PDIP 0 to 70 https://pricing.snapeda.com/search/part/LM324N/?ref=eda Texas Instruments None In Stock Aliases: undefined

DIP825W47P254L1917H533Q14 PDIP-14 Texas Instruments LM324N 4-Channel industry standard operational amplifier 14-PDIP 0 to 70 https://pricing.snapeda.com/search/part/LM324N/?ref=eda Texas Instruments None In Stock Aliases: undefined