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$5 junkbox Circuit Determines Phase Sequence - 04/23/98 EDN-Design Ideas:
[Note: File contains multiple circuits scroll to find this circuit.] Have
you ever wondered which way a blower motor is going to turn when you plug it into anor
socket, or have you ever inherited task of modifying three-phase wiring in your
plant?.....(design idea added 11/05) |
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µC measures High frequency signals - 03/02/98 EDN-Design Ideas: (design
idea added 6/06) |
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0-50V 2A Bench power supply Circuit - ….(design added 08/08) |
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1 Amp Current Injector - When you need to measure resistance down to a few micro
ohms, this circuit works great. It is powered from two "C" cell batteries and is
designed to inject a well-regulated one amp of current into the unknown resistance. By
measuring the voltage drop across the resistor with a digital voltmeter, the
resistance value can be accurately measured. The circuit also is equipped with a low
battery monitor. Published in Popular Electronics, November 1992 ….(designed by David
A. Johnson) |
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10 Amp 13.8 Volt Power Supply - Just like other commercial units, this circuit
uses the LM723 IC which gives us excellent voltage regulation. The circuit uses 3 pass
transistors which must be heat sinked….(electronic design added 6/07) |
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10 Hints for Making Better Network Analyzer Measurements - Aligent App Note
(app note added 6/07) |
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10 Practical Tips You Need to Know About Power Products 5965-8239E - Learn ten
simple ways to improve your testing capabilities with your power supplies and
electronic loads. Aligent Application Note (app note added 2/06) |
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10Hz - 100kHz D.D.S. Function Generator - (electronic circuit added 05/07) |
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10Hz - 1300MHz Frequency Meter - Universal VHF/ UHF frequency meter (circuit added
8/06) |
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120vac Under Voltage Tester - Using a cheap 24vac transformer, this circuit can
test a product under low 95vac conditions. With the components show, it has a
rating of 250 watts max. ….(designed by David A. Johnson) |
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13.8V 20A PSU - This is a Regulated DC power supply with short circuit protection
and with current limiter. (electronic design added 6/07) |
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16-Bit ADC Simplifies Current Measurements - DN341 Design Notes (Linear
Technology) (app note added 6/06) |
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2 GHz Frequency Counter - This simple counter is useful for frequency measurements
of various wireless equipments, especially transmitters, receivers and signal
generators in VHF/UHF band…(circuit added 8/06) |
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20MHz High Speed Function Generator - The High Speed Function Generator was
published in the professional electronics section of the Aug 1996 issue of Electronics
Australia, and has proven to be extremely popular. The kit is no longer available from
any of the kit suppliers. The project is capable of generating 20MHz or greater Sine,
Square, Triangle, and TTL waveforms. ….(electronic schematic added 11/08) |