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Microprocessor Circuits   Page 1
Microprocessors:  #'s     A-B     C-G     H-L     M-O     P     Q-S     T-Z

Last Updated on:
Friday, March 12, 2010 12:07 PM


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

+/-5V Power Supply Operation with TC7106A/7107A TC7106A/7107A - Microchip Application Note Published 12-Nov-02   (app note added 2/06)

µC Acts as Dedicated Motor Control - 09/11/98 EDN-Design Ideas  / (added 2/06)

µC Based Circuit Performs Frequency Multiplication - 05/27/99 EDN-Design Ideas / (added 2/06) 

µC Controls Charge Pump as Background Task  - 08/01/97 EDN-Design Ideas / (added 08/05) Because of power consumption and cost, designers of battery-powered devices mainly choose components that run at 3V or lower. Unfortunately, many devices operate only at 5V, including LCDs with built-in drivers, programming lines of many EEPROMs and flash chips, and CMOS ADCs.....

µC Controls Digital Potentiometer  - 10/08/98 EDN-Design Ideas  / (added 11/05) Several circuits in article, scroll to f ind this one.  Many digitally controlled potentiometers (for example, the LM1971/2/3 from National Semiconductor, www.national.com) incorporate a three-wire serial digital interface, using data, clock, and enable lines. In Figure 1, the potentiometer's nomenclature for these lines is Data-In... 

µC detects transmission rate of RS-232 interface - 09/30/99 EDN-Design Ideas / (added 2/06) 

µC forms FM oscillator - 10/28/99 EDN-Design Ideas / (added 2/06)

µC generates a frequency burst - 02/03/00 EDN Design Ideas  /  (added 10/05)   Pulse-sonar applications require generating bursts of a given frequency, duration, and repetition rate. Traditionally,  burst generator comprises a crystal oscillator with pulse modulation. But  easiest and cheapest way to generate  bursts is by using an inexpensive 8-bit µC, such as  68HC705KJ1 and 68HC7051A (Motorola) ....

µC generates musical sounds - 04/15/99 EDN-Design Ideas / (added 2/06) [Note:  File contains multiple circuits.  Scroll to find this one]  Many modern devices send audible signals to ir operators to indicate some of  predetermined conditions or states of  system under control. To avoid annoying....

µC Implements Pushbutton Light Dimmers - 06/18/98 EDN-Design Ideas / (added 08/05) A project required building a synchronous-demodulator circuit to track a line drawn on paper.  beauty of  synchronous-modulator/demodulator approach is its inherent noise rejection.  method rejects nearly….

µC makes inexpensive sine-wave generator  - 12/17/98 EDN-Design Ideas  / (added 2/06)    You can use A/D converters or external, controllable oscillators to generate sine waves from low-power, low-cost µCs. However, se methods add cost, reduce reliability, increase circuit and software complexity,....

µC measures High-frequency signals  - 03/02/98 EDN-Design Ideas  / (added 2/06)   

µC provides analog data to PLC chip - (07/03/97 EDN-Design Ideas / (added 2/06)   

µC Provides Wireless Keypad Control - 10/08/98 EDN-Design Ideas / (added 08/08/08) Scroll to finde specific article.  Portable systems, such as telephone handsets, make extensive use of low-dropout (LDO) regulators. se components provide noise-sensitive parts with a stable power-supply line.....

µC RePrograms Audio DAC via Serial Interface - 01/(07/99 EDN-Design Ideas / (added 08/05) [Note:  File contains multiple circuits scroll to find this circuit]  You can use a simple µC to continuously program an audio DAC so that it operates in a 20-bit resolution mode ( Figure 1 ). After power-on,  PCM1710 delta-sigma DAC (Burr-Brown Corp, www.burr-brown.com) operates in its default 16-bit resolution....

µC routines clear up errors  - 11/10/94 EDN Design Ideas /  (added 2/06) 

µC squares input signal - 12/19/96 EDN-Design Ideas / (added 7/06) Converting a random-width pulse to a signal with the same frequency but with a 50% duty cycle isn't easy, especially when the specified frequency range is large…..


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