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Circuit Diagrams
Published in Kevin Robinson, Practical Audio Electronics, 2020
A number of instances have already been mentioned where omissions are made, on the assumption that the builder will know to add these connections in the final circuit. Power and ground connections, including the sleeve connections of input and output jacks, have been discussed. A few other standard circuit elements are also commonly omitted or left up to the builder’s discretion. A circuit may be battery powered or it may take its power from an AC adapter, or it might be deemed desirable to allow for either option. In this latter case the usual arrangement will mean that any battery present will be disconnected if a jack is inserted into the power socket. This requires the use of a switching socket for the AC adapter, appropriately wired. Such details are rarely included in the schematic for the kind of generic audio circuit targeted here. A TRS jack at the input can often be found in guitar effects pedals, wired up to perform the function of an on/off switch. The details of implementing this, along with other options mentioned here, are covered in the standard building blocks discussed in Chapter 15.
Sensor Systems in Engineering
Published in Clarence W. de Silva, Sensor Systems, 2016
Digital ECG recorder: (Fukuda Denshi, 12-Lead Digital ECG Unit, 100–240 V/50–60 Hz AC adapter) Captures full electrocardiogram and forms a data fileBuilt-in software to process and interpret the signals (to assist diagnosis of some types of heart problems by doctor)Channel (lead) selection feature (to output different types of processed information)
Implementation of Smart Irrigation System Using Intelligent Systems and Machine Learning Approaches
Published in Kavita Taneja, Harmunish Taneja, Kuldeep Kumar, Arvind Selwal, Eng Lieh Ouh, Data Science and Innovations for Intelligent Systems, 2021
Raghuraj Singh, Ashutosh Deshwal, Kuldeep Kumar
12V-2A AC Adapter: To operate the entire circuit, a 12V-2A power adapter is used. Since we cannot provide the necessary power supply to all the actuators or sensors attached with the microcontroller via our personal computers or battery, for the efficient working of the system, we used 12V-2A additional power adapter to provide the appropriate power supply. Figure 13.12(C) shows the 12-V adapter used in the proposed system.
Device profile of the heartware HVAD system as a bridge-to-transplantation in patients with advanced heart failure: overview of its safety and efficacy
Published in Expert Review of Medical Devices, 2019
Silvia Mariani, Jasmin Sarah Hanke, Tong Li, Ali Saad Merzah, Anamika Chatterjee, Ezin Deniz, Axel Haverich, Jan D. Schmitto, Günes Dogan
The HVAD external system includes a microprocessor controller unit, a monitor and lithium-ion batteries. The controller hosts a liquid crystal display which regularly demonstrates flow rate, pump speed, power consumption and, when needed, the alarm lights. The controller is constantly connected to a power supply and it always requires two power sources for safe operation: either two batteries, or one battery and an AC adapter or DC adapter. Each battery contains lithium-ion cells to power the HVAD pump for 4–6 hours when fully charged. The capacity of each battery is based on the pump operating power consumption and the number of battery charge and discharge cycles. The batteries are supposed to have a useful operating life of more than 500 charge and discharge cycles and they should be changed if they support the pump for less than 2 hours. An additional battery inside the controller ensures power support when the external batteries are about to end. The controller and the batteries fit into a patient pack which is used to host and protect the external parts of the HVAD. The patient can freely use it while sleeping, moving and during all day activity. The pump controller is designed to be connected to a touch screen monitor used to display system performance and to allow clinicians to adjust selected parameters (e.g. alarm limits, setting of the pump speed, the setting of blood viscosity, etc.).
Development of automatic opening and closing shelf for convenience stores in cooperation with collaborative robot
Published in Advanced Robotics, 2022
Kosuke Mizutani, Nobuhiro Nagasawa, Kosei Demura
For the automatic opening and closing shelves, an Arduino microcontroller is installed on each shelf to control the automatic opening and closing. The equipment required for motorization was connected to the circuit board (Figure 9) that we created and to each connector. The power supply for the motor and microcontroller was a 12-V, 1-A AC adapter, which was depressurized by a 5-V three-terminal regulator.
Ultrasound processing of Chlorella vulgaris and a novel functional classification of power ultrasound test systems
Published in Biofuels, 2021
Power draw of the system was measured as apparent power via rms voltage and rms current measurements taken during operation using a digital multimeter with probes contacting the lines coming in to the AC adapter in parallel and series, respectively: