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Salt-Taster: Detects the amount of salt contained in liquid foods (added 3/05) |
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Samtec ASP-65067-01 Connector Page for Agilent Logic Analyzers: Agilent Application Note (added 6/06) |
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Scheme Detects Shorts: 07)/08/99 EDN Design Ideas / (added 2/06) [Note: File contains multiple circuits. Scroll to find this
one.] When you manually assemble complex boards, it's common to short-circuit adjacent component or IC pins. Determining which section of the circuit you have shorted is not too
difficult, but finding the precise point where the short exists can be a formidable task, because the short may be under a surface-mount component. The circuit in Figure 1 eases the diagnosis.
It uses off-the-shelf components, and you can build it in a few minutes. The circuit uses a DMM set at its maximum voltage-sensitivity scale (typically, 200 mV full-scale with 0.1-mV
resolution). The DMM measures the voltage drop in the divider comprising the 5W resistor and the cable and short-circuit resistance.... |
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Scheme provides high side Current sensing for White LED Drivers: 02/19/04 EDN Design Ideas / (added 1/05) White LEDs find wide
use in backlighting color-LCD screens in most portable devices, such as cellular phones, PDAs, and MP3 players. Multiple LEDs often connect in series to ensure that the same current flows
through every LED. To forward-bias these LEDs, a voltage of 10 to 16V comes from an inductor-based boost regulator, such as an SP6690.... |
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Scope Probe Measures High Frequencies: 01/18/96 EDN-Design Ideas / (added 3/03)
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Selecting the Optimum Test Tones & Test Equipment for Successful High Speed ADC Sinewave Testing: Maxim Application Notes / 1819 / Sep-08 (app note added 6/06) |
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Self Oscillating Amplifier for Distortion Testing #2: allows the home constructor to make quite accurate measurements, without having to spend a
lot of money on a low distortion oscillator (added 5/02) |
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Self Oscillating Amplifier for Distortion Testing: allows the home constructor to make quite accurate measurements, without having to spend a lot
of money on a low distortion oscillator (added 9/04) |
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Sense Milliamps to Kiloamps and Digitize to 12 Bits: DN227 Design Notes (Linear
Technology) (app note added 1/06) |
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Sensitive Remote Control Tester: (circuit / schematic design added 6/06) |
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Set/Reset Flip Flop: (electronic design added 10/06) |
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Setup Tests Bit Error Rate: 03/18/04 EDN Design Ideas / (added 11/05) 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. |
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Short Circuit Beeper #2: (electronic circuit added 1/05) |
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Short Circuit Finder uses Few Parts: 11/05/98 EDN-Design Ideas / (added 3/03) |
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Short-Circuit Protection for Boost Regulators: DN154 Design Notes (Linear
Technology) (app note added 1/06) |
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Signal Conditioning Precisely indicates Humidity: 02/02/98 EDN-Design Ideas / (added 4/02) The circuit in Figure 1 translates the level of
humidity from 0 to 100% into a stable, respective dc signal of 0 to 100 mV. The heart of the circuit is IC1, the IH3602-C relative-humidity sensor (Microswitch/HyCal Sensing Products,
Freeport, IL). This device operates on 5V at 200 mA and provides a dc output of 0.8 to 4.0V .... |
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Signal
Tracer/Injector: (schematic added 8/03) |
