Circuits & Schematics: Design - 7

61. Lowpass filter has improved step response
    John Guy
    Circuits Analogue Design Maxim MAX7409 MAX966
    .. common problem that arises when you design lowpass filters for signal conditioning is the filters' effect on the system's time-domain response. ...
    Oct 6, 2022

62. PWM DAC settles in one period of the pulse train
    Jordan Dimitrov
    Circuits Oscillators Microcontrollers Usage Texas Instruments TL071A LF398-N OPA2277. CD74HC02
    .. difficulties. The most important detail is that there are no suggestions on how to make the adjustment automatically. This Design Idea presents a circuit and a straightforward procedure to fill the gap. Using this method requires only one ...
    May 7, 2020

63. Extreme Business Cards
    Circuits Domestic Cellular
    .. well. You can of course use a specialised PCB package, but I wanted an unusual cursive font on mine, so just hand-drew the design on a graphics package. This allowed me to incorporate my name into the actual circuit board - the electric ...
    Dec 11, 2007
64. The Torch
    Circuits Light
    .. well. You can of course use a specialised PCB package, but I wanted an unusual cursive font on mine, so just hand-drew the design on a graphics package. This allowed me to incorporate my name into the actual circuit board - the electric ...
    Dec 12, 2007
65. CPLD Connects Two Instruments With Half-Duty-Cycle Generator
    Circuits Digital Oscillators
    .. AV-1015B, the pulse generator’s duty cycle is approximately 50 nsec at TTL with a 50 Ω load. The goal of this Design Idea is to increase the pulse generator’s high-level width to meet the triggering spec of a lock-in ...
    Dec 17, 2007
66. Microcontroller's Single I/O-Port Line Drives a Bar-Graph Display
    Circuits Microcontrollers Usage
    .. interpreted graphical indicator that allows comparison with its full-scale value, but a conventional microcontroller-based design uses at least one eight-line I/O port to drive an eight-segment-bar-graph LED display. As an alternative, ...
    Dec 18, 2007
67. LED Cube
    Circuits Light
    .. only lights one led at a time, since they’re relying on the microcontroller to both source and sink current. My design is a bit different. The mcu sources current to each anode column, and N channel fets sink current for the ...
    Jan 6, 2008
68. Microcontroller Simplifies Battery-State-of-Charge Measurement
    Circuits Wind Energy Power Solar
    .. a positive-charging current. The outputs of both op amps are positive and range from 0 to approximately 5 V and simplify design of the interface with the ADC's multiplexed inputs. Using Texas Instruments' TLC27 7 for IC2 offers the ...
    Jan 21, 2008
69. Build a USB-Based GPIB Controller
    Circuits Digital Supply
    .. more appropriate approach because external I/O ports, such as RS-232 and USB, tend to maintain backward compatibility. This Design Idea covers the development of a GPIB controller, which turned out to be easier and cheaper than commercially ...
    Jan 22, 2008
70. Envelope Follower Combines Fast Response, Low Ripple
    Circuits Supply TL072
    .. rapid attack and provide low ripple during the exponential decay but cannot follow the rapid decay of a muted string. The design in Figure 1 features fast attack and low ripple with minimal filtering, and it can follow a rapid decrease in ...
    Jan 22, 2008

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