C in Embedded Systems and the Microcontroller World:  National Semiconductor Application Note   (app note added 2/06)

Calculating Frequency Setting Resistors when Using the ML4835 / ABR-42019:  Fairchild Application Notes / (app note added 6/06)

Calculating Program Memory Checksums using a PIC16F87x:  Microchip Application Note Published 6-Nov-98   (app note added 2/06)

Can Bootloader for PIC18f can Microcontrollers:  Microchip Application Note Published 27-Aug-04   (app note added 2/06)

Can System using Multiple MCP25050 I/O Expanders:  Microchip Application Note Published 4-Nov-02   (app note added 2/06)

Canopen Stack for PIC18 Ecan Microcontrollers:  Microchip Application Note Published 12-Oct-05   (app note added 2/06)

Casio QV-200 Digital Camera Cable. :  Lose your cable? Build it yourself and save $29. Fits many QV models. (added 7/03)

Cd ROM Drive as Digital Audio CD Player:  (circuit / schematic design added 6/06)

Characterizing Digitally Modulated Signals with Ccdf Curves:  Aligent Application Note  (added 2/06)

Chinese Translation: Design Guidelines for Off-line Forward Converters using FPS / AN-4134SC:  Fairchild Application Notes / (app note added 6/06)

Circuit Applications of the AD2S80 and AD2S81 Resolver to Digital:  AN-265 Analog Devices Application Notes  (app note added 2/06)

Circuit Applications of the AD2S90 R/D Converter:  AN-230 Analog Devices Application Notes  (app note added 2/06)

Circuit Controls Ratiometric or Simultaneous Power Up of Multiple Rails:  05/13/04 EDN Design Ideas  /  (added 1/05)  Many applications use FPGAs, AS ICs, or DSP chips, which usually require multiple voltage rails, typically two: the core voltage and the I/O voltage. The core voltage is usually lower than the I/O voltage. Guidelines for determining how to power up two or more voltage rails depend on the part and the manufacturer you use....

Circuit Converts between TTL and Shifted Ecl:  08/15/96 EDN-Design Ideas / (added 3/03)  The bidirectional circuit in Figure 1 translates TTL to shifted ECL (SECL). There are currently no IC's available that perform this type of level translation. SECL levels correspond to either ECL or PECL referenced to a VCC of 2V and a VEE of -2.5V. You frequently encounter these levels in situations where the outputs of the ECL logic terminate through 50(ohm) directly to ground (most lab equipment, for example) instead of the nominal -2V (ECL) or 2.5V (PECL) VTT. To translate from TTL to SECL, each TTL data line connects....

Circuit Feeds CMOS Devices:  10/09/97 EDN-Design Ideas  / (added 3/03)   

Circuit Forms Industrial Grade Digital Potentiometer:  09/20/01 EDN Design Ideas  /  (added 1/05)  Both ac and dc motors in modern industrial systems often receive their control from PLCs (programmable-logic controllers) in a control room safely away from the process. If an operator must manually set the motor speed while observing the process, the component of choice is usually an industrial-grade potentiometer. ...

Circuit Gang Programs EEPROMs over I 2 C Bus:  09/13/01 EDN Design Ideas  /  (added 02/05) You use the fully controlled circuit in Figure 1 to parallel-program two-wire serial EEPROMs via the I2C bus. Gang programmers must address all memory devices during a write operation. To verify the memory contents, however, the system must address only one memory at a time during read operations. ...

Circuit Programs Atmel AVR Microcontrollers:  03/30/00 EDN-Design Ideas / (added 2/06)

Circuit Provides Watchdog for Microcontrollers:  12/26/02 EDN Design Ideas  /  (added 1/05)  The watchdog circuit in Figure 1 uses a single NAND Schmitt-trigger IC. The circuit is more cost-effective than dedicated, commercially available watchdog ICs. The circuit generates an active-high reset signal upon power-up and remains in a low state as long as the control input receives pulses. Whenever the pulsing at the control input stops, whether the circuit is in a high or a low state, th......

Circuit Transmits Arinc 429 Data:  07/11/02 EDN Design Ideas  /  (added 1/05)  The ARINC (Aeronautical Radio Inc) 429 specification defines the air transport industry's hardware and protocol standards for the transfer of digital data between avionics systems. Circuitry that can implement elements of the 429 spec is often an essential part of control and sensor electronics intended for the aviation environment....

CLC5526 Diversity Receiver Chipset:  National Semiconductor Application Note   (app note added 2/06)

CLC5902 Diversity Receiver Chipset:  National Semiconductor Application Note   (app note added 2/06)

CLC5956 Diversity Receiver Chipset:  National Semiconductor Application Note   (app note added 2/06)

Clearing the Software Write-Protect Feature on the 24lcs52:  Microchip Application Note Published 23-Feb-04   (app note added 2/06)

Clock Design using the PIC16c54 for LED Displays and Switch Inputs:  Microchip Application Note Published 26-Aug-97   (app note added 2/06)

Clock Divider Circuit:  (circuit added 7/02)

Clock Doubler for CMOS Logic:  Exclusive OR gate (added 4/02)

Closed Caption Decoder:  This is a closed-caption decoder with serial output, based on a PIC16C71, an Élantec EL4581C sync separator, and an LM393 dual comparator (for data slicing with automatic threshold). (added 3/03)

CMOS IC Makes Low Cost Digital Potentiometer:  01/18/96 EDN-Design Ideas / (added 6/06) A growing trend in the design of electronic equipment is to replace analog knobs used to increase or reduce a continuous signal (such as volume or brightness) with "up" and "down" keys. However, replacing a low-cost analog potentiometer with a digital potentiometer can be costly. The low-cost circuit in Figure 1 can eliminate the analog potentiometer in many applications. The circuit is based on a 16-channel CMOS multiplexer/demultiplexer and a string of resistors.

CN-4: The COP444l Evaluation:  National Semiconductor Application Note   (app note added 2/06)

CN-5: Oscillator Characteristics of COPS Microcontrollers:  National Semiconductor Application Note   (app note added 2/06)