Microprocessor Circuits   Page 7b
Microprocessors:  #'s     A-B     C-G     H-L     M-O     P     Q-S     T-Z
Last Updated on: Friday, March 12, 2010 12:08 PM

Security Keypad - This Electronic Code Lock uses a 12-keys keypad is used to enter a password and open an electrick lock or any other device with a signal. Uses an 8-pin PIC 12F629. (11/04)

Selecting a Processor Reset IC - Microchip Application Note Published 21-Nov-02   (app note added 2/06)

Selecting an MCP21XX Devicefor IRDA® Applications - Microchip Application Note Published 12-Aug-04   (app note added 2/06)

Selecting Input/Output Options on COPS Microcontrollers - National Semiconductor Application Note   (app note added 2/06)

Selection of MOSFETs in Switch Mode DC-DC Converters / AB-8 - Fairchild Application Notes / (app note added 6/06)

Self-Programming the PIC18C452 OTP - Microchip Application Note Published 6-Apr-01   (app note added 2/06)

Sensored BLDC Motor Control using DSPIC30F2010 - Microchip Application Note Published 23-Jun-05   (app note added 2/06)

Sensorless BLDC Motor Control using DSPIC30F2010 - Microchip Application Note Published 26-Jul-05   (app note added 2/06)

Ser Key 10 Key Serial Keypad Encoder - (electronic circuit added 7/03)

Serial Comms to LED Driver - (circuit / schematic added 2/03)

Serial LCD for microcontrollers using only 3 pins - Connect an LCD to your microcontroller to make it easy to develop and debug your application. You can choose which PIC I/O pins you want to use for the interface, and any HD44780 compatible LCD can be controlled…..(design added 05/09)

Serial to Parallel Converter using the AT89C2051 - (electronic circuit added 7/03)

Serial Voltmeter using the PIC16C71 - Building a serial voltage meter to measure from 0 to 5 volts DC is actually pretty easy. Using MeLabs PicBasic, and Microsoft's Visual Basic Version 5 Pro. You need Visual Basic Pro version because you will have to use Basic's MSComm control. This control is not available in the Visual Basic 5 "Learning" Edition. The PIC16C71 simplifies the task even more by having a built in A/D converter. Pins 17,18,1,2 are the analog inputs AIN0,AIN1,AIN2,AIN3 respectively. ….(electronic schematic added 11/08)

Serial-based PIC16F84 Programmer For Windows 95/98/NT/2000/ME/XP - (electronic circuit added 05/06/07)

Serialized Quick Turn Programmingsm Sqtpsm - Microchip Application Note Published 19-Sep-03   (app note added 2/06)

Setting Pre-Emphasis Level for DS40MB200 Dual 4Gb/s Mux/Buffer - National Semiconductor Application Note   (app note added 2/06)

Setup Tests Bit Error Rate - 03/18/04 EDN Design Ideas  /  (added 1/05)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 an RF signal, modulated by a pseudorandom code, to the receiver under test....

Several Atmel AVR programmer circuits - (diagram added 05/06/07)

Sharp Palm-Top/Hand-Held to RS-232 Serial Converter - (electronic circuit added 4/05)

signal Controls sine generator - 05/15/03 EDN Design Ideas  /  (added 1/05)The circuit of Figure 1 produces an accurate, variable-frequency sine wave for use as a general-purpose reference signal. It includes an eighth-order elliptic, switched-capacitor lowpass filter, IC3, which uses a 100-kHz square-wave clock signal that microcontroller IC2 generates. (Any other convenient square-wave source is also acceptable....

Signal Processing with the PIC16C74 - Microchip Application Note Published 26-Aug-97   (app note added 2/06)

Signboard - Scroll down to find link to circuit drawing and circuit explanation….(electronic circuit (added 09/06)

Signboard 2 - Scroll down to find link to circuit drawing and circuit explanation….(schematic added 09/06)

Simon Says memory game using a PIC16F84A or PIC16F628 microcontroller - The PC board has been designed for a PIC16F84A or PIC16F628.  (added 02/07)

Simple irrigation controller with PIC - (schematic / circuit added 6/07)

Simple logic analyzer pushes microcontroller to its limit - 12/(07/00 EDN Design Ideas /  (added 2/06) 

Simple RS422 Converter for Minilogger - Build a simple RS422 converter for the Minilogger.  ….(circuit design added 06/09)

Simple setup tests Bit error rate - 03/18/04 EDN Design Ideas  /  (added 1/05)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 an RF signal, modulated by a pseudorandom code, to the receiver under test....

Simplified Programming of Xilinx Devices using a SCANSTA111/112 JTAG Chain Mux - National Semiconductor Application Note   (app note added 2/06)

Simplified Thermocouple Interfaces and PICmicro® MCUs - Microchip Application Note Published 21-Jul-02   (app note added 2/06)

Simplify computer aided engineering with scientific to engineering conversion - 09/30/04 EDN Design Ideas  /  (added 1/05)The simple yet useful formula in this Design Idea enables conversion from scientific format (for example, 2.2-9), which is typical for CAE (computer-aided-engineering), double-precision output values, into "human-friendly" engineering format (for example, 2.2 nF). The engineering format......

Simplifying External Memory Connections of PIC17CXXX PICmicro ® Microcontrollers - Microchip Application Note Published 23-Aug-99   (app note added 2/06)

Single 4-Input IC Gives over 90dB Crosstalk: Design Notes Linear Technology added 01/06 - DN79  Design Notes (Linear Technology) (app note added 1/06)

Single microcontroller pin senses ambient light, controls illumination - LED circuit senses light and controls its own brightness.  Design Ideas EDN, 10/26/2006  (schematic added 05/06/07)

Single processor pin Controls on/off function - 04/29/04 EDN Design Ideas  /  (added 1/05)  A recent Design Idea prompted me to offer the simpler solution that I used in a recent project (Reference 1). We needed a momentary power switch with processor supervision. This supervision would allow the processor to delay a power-down request from a press of the power switch until all routines exited properly....

Single-Side PCB for Easy-Downloader V1.1 - Easy build and small size single side PCB for the 2051 programmer board.  ….(design added 06/09)

Smart AIR Handler using ProMPT™ and the PIC18F2539 - Microchip Application Note Published 20-Dec-02   (app note added 2/06)

SOA and Load Lines Apex-AN22 - Apex App Note (added 08/08/08)

Software Interrupt Techniques - Microchip Application Note Published 26-Aug-97   (app note added 2/06)

Software PID Control of an Inverted Pendulum using the PIC16F684 - Microchip Application Note Published 1-Dec-04   (app note added 2/06)

Software Stack Management - Microchip Application Note Published 26-Aug-97   (app note added 2/06)

Solar Energy Meter - Turn 8051SBC to be a dedicated instrument for measuring AC energy when sunshine. ….(electronic schematic added 06/09)

Solar Recorder T - The PIC Solar recorder for daily insolation measurement.  ….(circuit design added 06/09)

Solar Server - Build the solar station for insolation measurement with Ubuntu server 7.10 and a 24-bit Delta-sigma converter.  ….(design added 06/09)

Solder RefLow Recommendation - Microchip Application Note Published 6-Oct-04   (app note added 2/06)

Solving Second Sourcing Issues with the 24LC00 Devicein a SOT-23 Package - Microchip Application Note Published 30-Jan-98   (app note added 2/06)

Solving Sensor Offset Problems TC7106 - Microchip Application Note Published 12-Nov-02   (app note added 2/06)

Speech Recognition using HM2007 - (electronic circuit added 7/03)

Speed C functions for C16x microcontrollers - 08/03/00 EDN-Design Ideas  / (added 11/05)   The Infineon C16x Series of µCs use an internal 16-bit-register architecture. The architecture can also process byte-wide functions. The µC uses byte moves to implement library functions such as memset() or memcopy(). This process makes the library code .... (DI #2569)

Speedy Logic Translator uses Little Power - (07/08/99 EDN Design Ideas  / (added 2/06)  [Note: File contains multiple circuits.  Scroll to find this one.]  In handheld equipment, component count and power consumption are critical considerations. This Design Idea uses only a few transistors to configure a high-speed output stage of an RS-232C link while draining few ....

SPI Flash Microcontroller Programmer V3.7,  - new hardware and software for programming 89Sxx and AVR chips. Designed by Mohammad Asim Khan.  ….(electronic schematic added 06/09)

SPI Interface Big 7-Seg LED - Big display for general purpose usage, the interfacing is SPI serial interface, requires only 3-wires. Multiple digit can easily be made. DXF files single side PCB.  ….(circuit design added 06/09)

Squeeze extra outputs from a pin limited microcontroller - 08/04/05 EDN Design Ideas  / (added 2/06)   Shift register expands small-footprint microcontroller I/O.

State and Timing Modules for Agilent Technologies Logic Analysis Systems - Agilent Application Note   (added 6/06)

Statistical process control - Application Note MiniCircuits.com  (app note added 04/05/06)

STK200 Programmer -  ….(design added 06/09)

STK200/STK300 ISP Header - Pin diagram of STK200/STK300. Note for MEGA103 ISP signal.  ….(electronic schematic added 06/09)

Student DC Supply - Build a simple DC supply for microcontroller LAB using parts from broken radio. The Student DC Supply provides +5VDC regulated, +10VDC unregulated and 7.5VAC.  ….(circuit design added 06/09)

Substituting the RC5051 for the RC5050 / AB-10 - Fairchild Application Notes / (app note added 6/06)

Suppressing MOSFET Gate Ringing in Converters: Selection of a Gate Resistor / AB-9 - Fairchild Application Notes / (app note added 6/06)

Suppression of Prescaler Self-Oscillation 1/14/94  - Application Note California Eastern Laboratories Doc #902  (app note added 6/06)

Surface Mount Environmental Specifications - Application Note MiniCircuits.com  (app note added 04/05/06)

Surface Mounting for PowerSIP Package Apex-AN36 - Apex App Note (added 08/08/08)

Switch conserves microcontroller's I/O pin  - 09/15/94 EDN Design Ideas /  (added 2/06) 

Switch Mode Battery Eliminator Based on a PIC16C72A - Microchip Application Note Published 25-Mar-99   (app note added 2/06)

Switcher IC hikes Battery Charger's Efficiency - 06/23/94 EDN-Design Ideas / (added 11/05) The adjustable switching-regulator LM2575T-ADJ, IC1, in Fig 1 replaces a power-wasting pnp transistor in the data-book design for the NiCd battery charger IC2, a MAX713. (Its sister device, the MAX712, handles NiMH cells.) IC2 "fast-charges" cells by monitoring the cell's voltage and charging current until they...  

Synchronous buck MOSFET loss calculations with Excel model / AN-6005 - Fairchild Application Notes / (app note added 6/06)

System Design Considerations for Implementing a ROM Microcontroller - Microchip Application Note Published 15-Nov-99   (app note added 2/06)

System Design Practice TC4426/7/8, TC4426A/7A/8A - Microchip Application Note Published 12-Nov-02   (app note added 2/06)

System Supervisors in ICSP™ Architectures - Microchip Application Note Published 11-Feb-02   (app note added 2/06)