Circuits & Schematics: -Wire Barometer 5/10 Volt Design vrs - 7

61. Multiple power supplies fortify high-side gate control
    Steven Hendrix
    Circuits Supply Microchip MIC4680
    .. transition. Instead, transistors Q610 and Q611 are simple source-followers. As the gate voltage rises more than about a volt above the present value of net VeeDrive shown in Figure 1 at the source terminals of Q610 and Q611, Q611 turns ...
    .. a recent design project, a robust power supply was needed to control the gates of high-side FETs. Optocouplers readily ...
    Feb 14, 2024

62. Robot shield for Arduino. Part 1 - Hardware and Schematic
    Circuits MCU Open-Source Platforms Microcontrollers Usage Robots Arduino
    .. already prepared for all these functions, it is easy to install and use. We see now the considerations that led us to the design of this shield: must have a high voltage range will provide a stabilized output for the servos will provide ...
    Oct 31, 2012

63. High Power RGB LED Color Mixing
    Circuits Light Power CAT4101
    .. utilizing 1 amp maximum constant current drivers that are adjustable with trimmer potentiometers and powered from a 5 volt DC supply. Figure 1. Constant current drive circuit. With a 500 millivolt minimum above VF of the LED die, this ...
    .. aspect of high powered RGB LEDs on which we will focus. In order to produce consistent and repeatable colors, the first design criteria that must be met is that of a constant drive current for each of the RGB die. As shown in Figure 1, ...
    Mar 18, 2015
64. Microcontroller Solves Complex Temperature Polynomial Equations
    Ricardo Jimenez Roberto Solorio
    Circuits Microcontrollers Usage Theory LM103 PIC16F887
    .. a sampling time of 50 µs. The thermistor’s voltage reading is stored in binary format in the variable “ volt ” with the instruction ADCIN 0, volt . Then, this reading is multiplied by 48,828 to convert it to decimal, ...
    .. is the polynomial “Steinhart-Hart” equation (S-H), which has an error of 0.1 C. The temperature range for this design is from 0 C to 100 C. Three thermistor coefficients A, B, and C are required to implement the S-H equation. ...
    May 20, 2015
65. Schmitt trigger uses two transistors
    Circuits Analogue Design
    .. term depends on the gain of Q 2 , the measured voltage is usually somewhat different, but is typically in the 2 to 3 volt range. The current in RIN also adds into the voltage on R 2 (Eq. 9), and if R 1 is too small, the current will ...
    .. Abell EDN This Design Idea shows how to add positive feedback to a Darlington pair to create a Schmitt trigger with very high ...
    Sep 24, 2015
66. Linear ramp generator uses one op-amp
    Circuits Analogue Design Oscillators
    .. follower, with D1 D2 clamping the input to one diode drop above or below the output. When the input step-changes by a volt or more, the diodes will keep the voltage across R2 at a nearly constant 0.3 V (because the output will follow ...
    .. Abell EDN This Design Idea demonstrates a simple way to turn a step input into a ramp of nearly constant slew rate. The basic ...
    Nov 11, 2015
67. Simple circuit turns scope, function generator into JFET curve tracer
    Circuits Measurement Texas Instruments LM358
    .. to (I DS )×(R1). Op-amp U1B inverts this voltage and buffers it out for plotting, scaled at either 1 mA or 10 mA per volt. Figure 1. The curve tracer circuit is a simple transimpedance amplifier that converts the device test's I DS ...
    .. Reeve Electronic Design Commercial curve tracers have existed for decades. But designers without access to one can create a simple ...
    Jun 20, 2018
68. Simple Threshold Switch For An LED Indicator
    Circuits Analogue Design Light Texas Instruments TL431
    .. sinking current at its cathode and turning on the LED through D2. The potential at the TL431 cathode will drop as low as a volt or two. The TL431 can sink upwards of 100 mA and lights the LED very well. The TL431 will turn on when the sensed ...
    .. H. Russell Electronic Design I needed a simple LED indicator showing that a particular voltage level had been reached specifically, that a ...
    Apr 17, 2018
69. Two Terminal Bipolar Power Supply
    Victor Khasiev
    Circuits Supply Analog Devices LT8714
    .. positive output are shown in Figure 2. Figure 2. The topology of a 2-quadrant operation with a positive output. When the volt-second balance is in a steady state, the duty cycle can be derived from the expression: To verify the design, ...
    Oct 14, 2019
70. Ultralow Noise, 48 V, Phantom Microphone Power Supply Using a Tiny DC-to-DC Boost Converter
    Christopher Jarboe Thomas Mosteller
    Circuits Audio Supply Analog Devices LT8362
    .. of 63 V means that the required caps are both big and expensive. A second approach would be to increase the LT8362 output a volt or two and add an LDO regulator to the output. This requires a high voltage LDO regulator, which usually costs ...
    .. doubling up on bulk output cap C4 to maintain equivalent performance. References Nelson, Carl. Application Note 19: LT1070 Design Manual. Analog Devices, Inc., June 1986. Williams, Jim. Application Note 101: Minimizing Switching Regulator ...
    Jun 2, 2020

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