Make a DAC with a Microcontroller's PWM Timer:  09/05/02  EDN Design Ideas / (schematic / circuit added 11/03)    Many embedded-microcontroller applications require generation of analog signals. An integrated or stand-alone DAC fills the role. However, you can often use PWM signals for generating the required analog signals. You can use PWM signals to create both dc and ac analog signals. This Design Idea shows how to use a PWM timer to simultaneously create a sinusoid, a ramp, and a dc voltage..

Make Noise with a Pic:  08/07/03 EDN Design Ideas  /  (added 1/05)  Building a stable noise generator for audio-frequency purposes requires only a few components. The circuit in Figure 1 relies on linear-feedback shift registers and some simple software. An eight-pin Microchip (www.microchip.com) PIC12C508 controller (IC2) with a short program generates pseudorandom noise at its output pin, GP0....

Manipulating the Stack of the PIC18 Microcontroller:  Microchip Application Note Published 21-Mar-02   (app note added 2/06)

Mastering the PIC16C7x A/D Converter:  Microchip Application Note Published 10-Apr-02   (app note added 2/06)

Measure humidity and temperature on one TTL line:  08/30/01 EDN Design Ideas  /  (added 1/05)  By combining the responses of an Analog Devices (www.analog.com) AD590 temperature sensor and a Humirel (www.humirel.com) HS1101 humidity sensor, you can generate a single TTL-level signal containing information from both sensors (Figure 1). This design uses a 74HC123 monostable multivibrator, IC1, to form a free-running oscillator. ...

Measure Tilt using PIC16F84a and Adxl202:  Microchip Application Note Published 18-Aug-99   (app note added 2/06)

Measuring Characteristic Impedance of Short Rambus Motherboard Traces and Small-Outline RIMMs:  Agilent Application Note   (added 6/06)

Meeting the Challenge of Computer System Validation:  Agilent Application Note   (app note added 6/06)

Memory Address Multiplexing using 3.3V Bus Switch:  Pericom Semiconductor Application Brief # 022 (app note added 02/05)

Memory Systems Multiplexing for High-Performance Workstations:  Pericom Semiconductor Application Brief # 035 (app note added 02/05)

Methods Link ECL& Pecl:  03/02/95 EDN-Design Ideas / (added 03/03)  

Micro Spy with TTL:  (circuit / schematic design added 6/06)

Microchip Stack for the Zigbee Protocol:  Microchip Application Note Published 5-May-05   (app note added 2/06)

Microcontroller Becomes Multifunctional:  10/25/01 EDN Design Ideas  /  (added 1/05)  A microcontroller, by default, can execute only one program at a time. What do you do if, in a given project, you need to perform more than one operation at a time? Add more microcontrollers to the design? In certain cases it's unnecessary. Consider a real-life situation (Figure 1). The microcontroller constantly generates on its Pulse output pin a sequence of pulses

Microcontroller Emulates Numerically Controlled Oscillator :  02/21/02 EDN-Design Ideas / (added 5/03) Microcontrollers commonly add intelligence or digital functions to products, but they can also provide a variety of analog signals. This circuits uses an18-pin PIC16C54 microcontroller, combined with an inexpensive, 8-bit DAC and a simple lowpass filter.

Microcontroller Interface to theADC12038 Families:  National Semiconductor Application Note   (app note added 2/06)

Microcontroller Makes Effective Frequency Counter:  11/23/00 EDN-Design Ideas / (added 5/03)

Microcontroller Multiplexes Dip Switches to I/O Port:  02/17/00 EDN-Design Ideas / (added 2/06)  

Microcontroller or DSP Circuit Controls On/Off Function:  11/13/03 EDN Design Ideas  /  (added 1/05)  In many applications, a single on/off button switches the power supply on or off. Usually, the system switches off regardless of the processing function or workload the microcontroller or DSP circuit is currently handling. The small circuit in Figure 1 is intended to make the microcontroller or DSP circuit the master over this on/off function....

Microcontroller Provides Timer Function:  01/04/01 EDN Design Ideas /  (added 2/06)

Microcontroller Takes Control of Comparator:  09/01/00 EDN Design Ideas /  (added 2/06) 

Microcontroller Watches Controls AC Power:  06/22/95 EDN-Design Ideas -circuit allows an isolated microcontroller to both sense and control ac power to an externally plugged-in device (added 5/03)

Micropower Circuits using the LM4250 Programmable Op Amp:  National Semiconductor Application Note   (app note added 2/06)

Microprocessor Core Supply Voltage Set by I2c™ Bus Without Vid Lines:  DN279  Design Notes (Linear Technology) (app note added 1/06)

Microprocessor RS-232 Reset:  (schematic / circuit design added 9/02)

Microprocessor using Xilinx FPGA:  (electronic circuit added 4/05)

Micro-Spy with FETs:  (electronic circuit added 4/05)

Micro-Spy with TTL:  (electronic circuit added 4/05)

Micro-Spy with Usw:  (electronic circuit added 4/05)

Microstepping with Pbm3960 and Tea3718:  (electronic circuit added 4/05)

Migrating Designs from PIC16C74a/74B to PIC18c442:  Microchip Application Note Published 28-Sep-99   (app note added 2/06)

Migrating from the TMC2490/TMC2491 to the TMC2490A/TMC2491A / AN-51:  Fairchild Application Notes / (app note added 6/06)