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E-B-C Transistor Pin Identifier: Tests transistors and diodes for polarity Simple circuitry 9V Battery operation (added 02/05) |
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Elecraft XG2 receiver test oscillator: (schematic / circuit added 05/07) |
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Electric field & leakage detector: (diagram added 05/07) |
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Electrolytic capacitor tester: (diagram added 05/07) |
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Electromagnetic Emissions Test Report on Solid State Energy Meter: Electro Analog
Devices Application Notes (app note added 6/06) This report describes electromagnetic immunity testing performed on September 9, 1999 through September 10, 1999 on the Solid State
Energy Meter. Testing was performed pursuant to IEC 1036:1996, a standard for alternating static watt-hour meters for active energy. |
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Electromagnetic Emissions Test Report on the AD7755: AD7755 Analog Devices Application
Notes (app note added 6/06) This document describes electromagnetic emissions testing performed on the Energy Meter (AD7755) on September 8, 1999, pursuant to EN55022
requirements. It may be used to demonstrate compliance with the European Union emissions requirements pursuant to the EMC directive |
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Electromagnetic Field Detector #2: This circuit is sensitive to low frequency electromagnetic radiation and will detect for example hidden wiring
or the field that encompasses a transformer. Pickup is by a radial type inductor, used as a probe which responds well to low frequency changing magnetic and electric fields. Ordinary
headphones are used to for detection. The field that surrounds a transformer is heard as a50 or 60Hz buzz. (added 5/02) |
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Electromagnetic field detector #3: This lovely circuit is a real gem! Easy to assemble
and more sensitive than many commercial devices available. It's based around an LF351 low-noise operational amplifier and a 1mF choke acting as the sensor. Unlike most other simple EMF
detectors, this one has a meter output for accurate reading, but alternatively, you can also roughly estimate the frequency of the field by plugging in headphones. It can detect any field from
50Hz to 100kHz, making it highly versatile and a worthwhile addition to any hobbyist's workbench. (added 10/05) |
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Electromagnetic field detector: (electronic design added 10/06) |
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Electromechanical damping stabilizes analog meter readings: 09/29/05 EDN -Design Ideas / (added 11/05) Electronics
damps meter-needle swings. |
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Electronic distance meter Based on Motorola 68HC908QY4: (circuit / schematic design
added 6/06) |
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Eliminate thermoelectric EMF in Low ohm measurements: 06/13/02 EDN Design Ideas / (added 1/05) When two different-metal
conductors connect together in a loop and one of the junctions is at a higher temperature than the other, an electrical current flows through the loop. The magnitude of this current depends on
the type of metals involved and the temperature differential of the junctions. When you open such a loop, a thermoelectric voltage appears across the open ends.... |
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EMF field probe: (circuit added 05/07) |
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EMF Field Probe: (electronic design added 9/02) |
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Emulator Speeds Testing: 09/25/03 EDN Design Ideas / (added 1/05) Designing and testing embedded hardware can be frustrating if
you have to rely on somebody else's perhaps-unready firmware to test your hardware. Often, hardware is ready for testing before debugging and system firm-ware are available from software
developers. Microprocessor emulators are solutions but are often expensive, hard to use, and sometimes inappropriate for use by hardware developers,...... |
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Envelope Tracker Quells Jitter: 07)/07)/94 EDN-Design Ideas / (added 6/06) Fig 1's envelope tracking circuit solves the problem of
receiving ac-coupled NRZ data over a coaxial data link. Because the spectral content of the NRZ data approaches dc (even with alternate frame inversion), the signal tends to integrate in any
ac-coupled stage preceding the zero-crossing detector, despite the low cutoff frequencies. Thus, the dc level of the received data wanders, changing the relative switching point at the
comparator..... |
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Environmental Compensation on the AD7145: AN-829 Analog Devices Application Notes
(app note added 6/06) |
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E-Power Meter: Intersil Application Block Diagram (app note added 6/06) |
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ERA-SM
Test Board: Instructions for Use AN-60-019: Application Note MiniCircuits.com (app note added 6/06) |
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ESD Gun Tests IC: 09/12/96 EDN-Design Ideas / (added 2/06) You can use the simple ESD-test gun in Figure 1 to test the effects of
ESD through sensitive ICs. A piezo-electric type kitchen gas lighter (the so-called ESD gun) is an excellent fast-static-charge generator. This gun can cause ESD through air and also through
conducting and semiconducting materials. These devices also meet home-use safety standards. To build the device, extend the main pin of the gun so that this pin nearly reaches the test pin of
the IC. This distance can be as close as 2.5 mm to form a trigger gap. To fire an ESD pulse directed toward the test pin, just squeeze the gun handle, and a fine flash appears at the test pin
of the IC. The amount of charge is about 0.2 µC, and the pulse duration varies from 100 nsec to 1 µsec.... |
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ESD
Sensitivity Testing of Mini-Circuits ERA-4XSM AN-60-028: Application Note MiniCircuits.com (app note added 6/06) |
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ESD
Sensitivity Testing of Mini-Circuits ERA-5XSM AN-60-029: Application Note MiniCircuits.com (app note added 6/06) |
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ESR
Meter: (diagram added 8/03) |
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Ethernet 10Base T Simulator Jig yields Zero Emissions: 10/22/98 EDN-Design Ideas / (added 3/03) |
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Expanded Scale Battery Volt Meter: This circuit is used to measure the voltage on a 12V (nominal) lead acid rechargeable battery system. It was
specifically designed for use in solar powered systems, but is general enough that it can be used for automotive or other 12V systems. Lead acid batteries normally spend their working lifetime
in the voltage range of 11-15 Volts. This meter circuit was designed to show the voltage range of 10-15V on an analog meter movement, it can be used to show the battery charge state from empty
to full. (added 10/05) |
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Expanded scale indicator revisited: 08/08/02 EDN Design Ideas / (added 1/05) The visualization aid that a previous Design Idea
describes allows only the expansion of the upper end of the scale (Reference 1). But what can you do if, according to your project requirements, you need to expand the middle region of the
scale? Figure 1a illustrates the challenge. A voltmeter comprises a 100-µA dc meter and a series resistor.... |
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Exploring the Architectures of Network Analyzers:
Aligent Application Note (added 4.08 |
