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18 bit ADC uses PC's serial port:
09/27/2001 EDN
- Design Ideas / A PC usually requires a plug-in ADC card
to process analog signals. However, with the circuitry in Figure
1, a PC can communicate with an 18-bit ADC through its serial
port. The port provides both positive and negative power
supplies as well as control signals. IC1 is an 18-bit MAX132 ADC
with a serial interface. |
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Casio QV 200 Digital Camera Cable:
Lose your cable? Build it yourself and save $29. Fits many QV
models. |
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Centronics port generates narrow pulse widths:
08/02/2001 EDN
- Design Ideas / Variable-pulse-width signals are useful in
control circuitry for positioning and holding purposes in
robotics and power electronics. Frequently, the need arises for
pulses with width less than 1 msec. Delays less than 1 msec are
usually not available in most programming languages, so
generating such pulses can be a problem.. |
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Commonly used RS232 Serial Port Cables:
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Connecting Sega 3D Glasses to a PC Serial Port:
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Drawing Power From a PC Serial Port:
This circuits derives fairly low power, (mA at5V) from a RS-232
serial connection. (NOTE: ASCII drawing) |
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Getting Power From Serial Port: |
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Laptop Computer Serial Port Power Booster:
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LM1823High
Quality T Volt Video I.F. Amplifier and Synchronous Detector for
Cable Receivers:
National Semiconductor Application Notes,09 Apr1996 |
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Low Voltage Powers ParallelPort Interface :
06/24/02 Electronic Design -
Ideas for Design / For portable-sensing and data- acquisition
applications, a laptop computer and its parallel port (LPT) make
good bedfellows. Yet in the effort to extend battery life, many
microprocessors and entire systems operate with logic levels
down to 1.8 V. The... |
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Null Printer Adapter: |
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RS232 Serial Port Buffer Circuit: |
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RS232C Serial Port Scans Remote Keypad:
12/04/97 EDN-Design Ideas |
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Serial Port a / D Converter: |
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Serial Port Break Reset Circuit: |
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Simple method tests cables:
10/17/2002 EDN
- Design Ideas / Engineers have long known how to test a cable
for continuity by simply connecting all conductors in series and
checking with an ohmmeter. This method is sometimes impractical,
however, because it cannot check for short circuits. The method
shown in Figure 1 solves the short-circuit problem. Connecting
LED indicators at each shorting loop provides a visual
indication.. |
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Thermocouple Interfaces to Serial Port:
11/09/95 EDN-Design Ideas |
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X Y Keypad uses �C's Serial Port:
10/10/96 EDN-Design Ideas |
