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Simple µC acts as
dedicated motor control - 09/11/98 EDN Design Idea
(Scroll to find this circuit design) Motion-control systems often use a PWM signal to control the duty
cycle for a motor driver or Amplifier module. Typical designs generate the PWM signals using µC with
dedicated PWM output lines, such as the PIC16C65 (Microchip Technology, www. microchip. com) and the HC11
(Motorola Inc, www. motorola. com). However, these µC may have more features than necessary for a
motion-control system with multiple degrees of freedom. . . [by Dylan Horvath, Gecko Systems Inc, Austin,
TX]
Simple circuit "feeds" CMOS devices - 10/09/97 EDN Design Idea To retain the data of CMOS devices, such as real-time clocks or
setup RAM, you need to provide power to these devices while the rest of the circuit is off. The conventional
solution uses a CMOS switch, such as the CD4066. . . [by Luis H Loss, Iochpe-Maxion, Porto Alegre, RS,
Brazil] |
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Simple circuit feeds CMOS devices - 10/09/97 EDN Design Idea To retain the data of CMOS devices, such as real-time clocks or
setup RAM, you need to provide power to these devices while the rest of the circuit is off. The conventional
solution uses a CMOS switch, such as the CD4066. . . [by Luis H Loss, Iochpe-Maxion, Porto Alegre, RS,
Brazil]
Simple circuit provides
digital hysteresis - 12/03/98 EDN Design Idea (File
has several circuit ideas. Scroll to find this one. ) It is sometimes useful to have hysteresis in a digital
circuit—for example, in a power circuit under the control of a manual pulse generator, in which mechanical
vibrations can produce position errors. The circuit in Figure 1, which consists of a 4585 comparator (IC2) ,
a 4019 switch (IC1) , and one-sixth of a 4069 inverter (IC3) , provides digital hysteresis. If DI=0, DA=8,
and DB=6, then Output 12 and G2 of IC2 assume logic 1, and G1 of IC2 assumes logic 0. . . [by W Dijkstra,
Waalre, The Netherlands]
Simple digital filter cleans up noisy data - 03/02/06
EDN Design Idea Cleans up data from pressure and temperature sensors. . . [by Richard Rice, Oconomowoc, WI]
Simple FIFO provides data-width conversion - 09/26/02 EDN Design Idea Many designs require FIFO elastic buffers to form a bridge
between subsystems with different clock rates and access requirements. However, in some applications, you
need FIFO buffers for data conversion. One example is the case in . . . [by David Lou, Ghent University,
Ghent, Belgium]
Simple FSK Modulator Enables Data Transmission Over Low-Speed Link - 06/11/09 EDN Design Idea Send digital data over a low-speed link. . . [by Israel
Schleicher, Prescott Valley AZ]
Simple hookup increases AD2101's memory - 04/27/95 EDN Design Idea The circuit in Fig 1 increases the memory of Analog Devices' 2101
family of fixed-point DSP µPs. The simple scheme uses only three external static-memory devices and no glue
logic. With the additional memory, the DSP µP will have. . . [by Bogdan Morariu Digital Dispatch Systems,
Richmond, BC, Canada]
Simple logic analyzer pushes µC to
its limit - 12/07/00 EDN Design Idea Simple logic-analyzer
design is compatible with all versions of Windows and pushes the PIC 18C252 chip to its speed limit to
achieve
a 1-MHz sampling rate (Figure 1). The circuit. PDF contains multiple circuits, scroll to find this. . . [by Tom
Lyons Fisher, Inexpensive Systems, Huntingdon, PA, and Michael Deskevich, Juniata College, Huntingdon, PA]
Simple Logic Probe
uses Bicolor LED - 03/13/98 EDN Ideas (File has several
circuits, scroll to this one) A project posed the challenge of replacing existing analog potentiometers (used
to set brightness and contrast levels] in video monitors with digitally controlled potentiometers. The diffe.
. . [by Mark Shill, Burr-Brown Corp, Tucson, AZ]
Simple logic
reduces EMI - 08/05/99 EDN Design Idea A
current-input ADC whose primary use is measuring low-level signals from photodetectors can also measure a
range of voltages using the circuit in Figure 1. The main component is a dual-input current-integrating ADC,
IC1. IC2 and. . . [by Eugene Palatnik, BCI International, Waukesha, WI]
Simple
Low Cost Digital Code Lock - . . .
Simple RS232C Level Converter
using Transistors - There're many, who built the Easy
Programmer or C-52 EvaluationBoard, asking for the RS232C level converter chip, DS275. Many have changed to
MAX232 instead, because of not available in his home. Here is another simple and cheap circuit using small
signal transistor providing TTL toRS232C level converter. . . [Wichit Sirichote, designer]
Simple setup tests bit-error rate - 03/18/04 EDN Design Idea Traditionally, the reception quality of a digital receiver is
expressed in terms of BER (bit-error rate]. This figure is the proportion of received bit errors in a given
period. Typically, you measure the BER in the lab by applying. . . [by Israel Schneiderman, Rosslare Israel
Ltd, Rosh Ha'ayin, Israel]
Simple Surface
Mount Flash Memory VPP Generator - DN58 Design Notes
(Linear Technology). . . [Linear Technology]
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