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Handling Instructions & Protection Against Electrostatic Discharges - Application
Note Microsemi-formerly Advanced Power Technology APT0502 ( app note added
05/07) |
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Hardware histogram speeds ADC test - 11/13/03 EDN-Design Ideas: Accumulating
enough samples to effectively and accurately measure linearity errors in pipeline
converters at production test and minimizing test time are difficult enough. Add to
that multiple sites, multiple channels, and the expense of multiple custom-instrument
resources during periods of low capital expenditure, and engineers must think
creatively to increase throughput without sacrificing.....(design idea added 1/05) |
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Heath EU-14A "Special Experimental Parts" specs and schematic - (added 07/07/07) |
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Heath EUP-26 VOM specs and schematic - (added 07/07/07) |
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Heath EUW-16 Voltage Reference Source specs and schematic - (added 07/07/07) |
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Heath EUW-17 Transistor Power Supply specs and schematic - (added 07/07/07) |
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Heath EUW-19A Operational Amplifier System specs and schematic - (added 07/07/07) |
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Heath EUW-20A Servo-Recorder specs and schematic - (added 07/07/07) |
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Heath EUW-24 VTVM specs and schematic - (added 07/07/07) |
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Heath EUW-25 DC Oscilloscope specs and schematic - (added 07/07/07) |
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Heath EUW-27 Sine-Square Wave Generator specs and schematic - (added 07/07/07) |
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Heathkit AV-1 AC voltmeter schematic - (added 07/07/07) |
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Heathkit C-3 Condensor checker schematic - (added 07/07/07) |
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Heathkit G-5 signal generator schematic - (added 07/07/07) |
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Heathkit HD-1 harmonic distortion analyzer schematic - (added 07/07/07) |
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Heathkit HD-1250 solid-state dipper schematic - (added 07/07/07) |
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Heathkit HM-10A "Tunnel Dipper" schematic - (added 07/07/07) |
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Heathkit IB-2 impedance bridge schematic - (added 07/07/07) |
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Heathkit IM-18 VTVM schematic (similar to most other Heath VTVMs) - (added
07/07/07) |
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Heathkit IP-17 0-400V regulated power supply schematic - (added 07/07/07) |
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Heathkit IP-27 LV regulated power supply schematic - (added 07/07/07) |
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Heathkit RC-1 Radiation Counter partial manual - (added 07/07/07) |
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Hewlett-Packard 200CD AF oscillator schematic (early model with 6SH7/6AU5GT) -
(added 07/07/07) |
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Hewlett-Packard 206A AF oscillator schematic - (added 07/07/07) |
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Hewlett-Packard 3200B VHF oscillator operating and service manual - (design added
08/03) |
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Hewlett-Packard 339A Distortion Analyzer manual - (design added 07/07/07) |
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Hewlett-Packard 400 AF VTVM manual w/schematic - (added 07/07/07) |
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Hewlett-Packard 410B RF VTVM schematic - (added 07/07/07) |
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Hewlett-Packard 606A RF generator manual w/schematic - (design added 07/07/07) |
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Hewlett-Packard 711A Power Supply manual - (design added 07/07/07) |
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High And Low Voltage Cut Off With Time Delay - The power line fluctuations and
cut-offs cause damages to electrical appliances connected to the line. It is more
serious in the case of domestic appliances like fridge and air conditioners. If a
fridge is operated on low voltage, excessive current flows through the motor, which
heats up, and get damaged.….(electronic schematic added 08/08) |
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High impedance FET probe extends RF spectrum analyzer's usable range - 07/21/05
EDN-Design Ideas: Diodes and guard traces suppress high-voltage static-discharge
transients.....(design idea added 8/05) |
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High Impedance Voltmeter - (schematic / circuit added 2/07) |
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High Precision Rail-to-Rail Output Operational Amplifier - National Semiconductor
Application Note LMV2001 April 2004 (app note added 02/05) |
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High Resistance Voltmeter - (electronic circuit added 10/05) |
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High side current monitor operates at high voltage - 07/22/04 EDN-Design Ideas:
The simplest technique for measuring current in an actuator or a motor is to monitor
the ground current with a resistive element between the load and the ground. Because
the device and its associated electron Online (added 1/05) |
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High side Current sense causes little error - 0316/95 EDN-Design Ideas:
Measuring dc would be simple if you could always reference your measurement signals to
the positive rail. Unfortunately, most current-metering applications require a
ground-referenced output. Typically, the signal that you want to measure consists of a
small differential signal that rides on a large common-mode voltage.....(design idea
added 2/06) |
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High side Current sensing switched mode regulator provides constant Current LED drive
- 04/14/05 EDN-Design Ideas: Drive LEDs with constant-current source.....(design
idea added 2/06) |
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High Side Current Sensor has Period Output 1 - Maxim APP 1084: May 31, 2002 / (app
note added 5/08) |
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High-impedance voltmeter - An ideal voltmeter has infinite input impedance,
meaning that it draws zero current from the circuit under test. This way, there will
be no "impact" on the circuit as the voltage is being measured. The more current a
voltmeter draws from the circuit under test, the more the measured voltage will "sag"
under the loading effect of the meter, like a tire-pressure gauge...(schematic added
6/07) |
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High-Side Current Sensing: Considerations and Applications for High-Side Current
Monitoring - Zetec Semiconductors Applications Notes A guide for using
the ZXCT range of products. Contained within the note are application ideas for
extended supply ranges, a circuit for bi-directional current sensing and an
over-current/short circuit protection circuit. Now updated and contained within AN39
(app note added 2/06) |
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High-speed lightwave component analysis - Aligent Application Note 1550-6
(added 4/08) |
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Home-Brew electronic altimeter - A while back, I decided I wanted an altimeter to
record how high my rockets were flying. I didn't want to buy one, since a) they aren't
cheap (at least, not the ones which do everything I want them to do), and b) buying
one is far too easy. I considered the CP Technologies kit, which is based on the
Missile Works RRC2,....(added 6/07) |
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HOTCHEK - The HOTCHEK is a compact expanded scale voltmeter designed to check the
receiver battery pack. Its very small size makes it great as onboard voltage monitor
or it can be used as a "pocket meter," replacing those old fashioned bulky meters. A
0.3A load can be placed across the batteries with a push of a button allowing the true
state of the pack to be tested (added 6/07) |
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How to Use the MAXQ2000 as a Voltmeter - Maxim App Note 4194 -- 3/24/2008 --
(app note add 5/08) |
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HP48SX IR DECODER - (electronic design added 6/07) |
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HV430 105 Volt RMS Ring Generator - Supertex Semiconductors (app note added
2/06) |
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IC and DMM form direct read out temperature probe - 09/01/06 EDN-Design Ideas:
Simple circuit yields linear voltage-versus-temperature output.....(design idea added
10/06) |
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IEC Compliant Active-Energy Meter Design using the MCP3905/6 - Microchip
Application Note Published 27-Jul-05 (app note added 6/06) |
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IEC Compliant Active-Energy Meter Design using the MCP3905/6Chinese - Microchip
Application Note Published 17-Oct-05 (app note added 6/06) |
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Improved current monitor delivers proportional voltage output - 01/19/06 EDN-Design
Ideas: New, improved circuit delivers an accurate linear-voltage output
proportional to current in primary winding.....(design idea added 9/08) |
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Improved Kelvin contacts boost current sensing accuracy by an order of magnitude -
02/17/05 EDN-Design Ideas: Many power-supply designs rely on accurately sensing
the voltage across a current-sense element. Multiphase regulators use the sense
voltage to force current sharing among phases, and single-phase regulators to control
the current-limit setpoint. As internal complexity and clock speeds increase,
processors impose narrower operating margins for power-supply voltages and currents,
which in turn m.....(design idea added 5/05) |
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Improved two-tone, third order testing - Application Note MiniCircuits.com
(app note added 04/05/06) |
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In-circuit electrolytic tester - This project comes in two versions: as an
"add-on" for the 5x7 project (pages 1&2) and as a "stand-alone" project (pages3&4).
Read both sections before deciding on which version you will build….(circuit added
05/06) |
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Increasing Regulator Current - you can boost 78xx regulator output with1-power
transistor (added 5/02) |
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Indicator features expanded scale - 02/21/02 EDN-Design Ideas: Test
equipment for a production line should be user-friendly (read "idiot-proof")and should
offer minimal test time. In many cases, the test fixture must give an operator only
one answer: pass or fail. Usually, two indicators assume this role: green for pass and
red for fail. In most applications, a sensor transforms the tested parameter to a
voltage; the test fixture.....(design idea added 1/05) |
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Inductance meter - Determination of the resonance frequency of a parallel LC
network is one of the most important measuring problems in the ham shack. Not unjustly
the commonly used dip meter is nicknamed “sounding-rod of the radio amateur”. A
more elegant method for measuring the resonance frequency is …(circuit added 04/05/06) |
| Inductance meter - (added 6/07) |
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Inductance meter adapter - The following circuit enables me to measure inductance
of the inductor labeled LX which is the inductance to be measured. The o/p of the
circuit is a TTL square wave whose frequency relates….By Tosin Osanyintuyi (TAFRICA)
(circuit added 09/08) |
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Inductance meter for RF Inductors - needed a way to measure hand-wound RF
inductors in my second lab, and since I would only be doing this occasionally, I
didn't need anything fancy, and since once a friend finishes his AT90S1200-based
design, I plan to make one myself, I figured I'd use this for less than a year, so I
didn't t,...(schematic / circuit added 6/07) |
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Inductive meter adapter - ….(design added 03/08) |
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Inductor Self-Resonance Tester - If you want to know what the self-resonance
frequency is of an inductor, this circuit will help. It adds only a few picofarads of
parallel capacitance to the inductor under test. With the aid of an oscilloscope and a
signal generator this circuit will allow you to measure resonant frequencies from
kilohertz to over 10 megahertz. ….(designed by David A. Johnson) |
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Infra Red Remote Control Tester) - ….(design added 03/08) |
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Infrared Remote Control Tester (Andy Collinson) - This circuit is the result of my
research. I have used a photodiode, SFH2030 as an infra red sensor. A MOSFET opamp,
CA3140 is used in the differential mode to amplify the pulses of current from the
photodiode. LED1 is an ordinary coloured led which will light when IR radiation is
being received. The output of the opamp, pin 6 may be connected to a multimeter set to
read DC volts. Infra red remote control strengths …. (added 5/02) |
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Instrumentation amplifier extends DSO - 01/05/06 EDN-Design Ideas: Elusive
current waveforms required scope documentation.....(design idea added 10/06) |
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Integrator enables simple ohmmeter with gigohm range - 05/24/07 EDN-Design Ideas:
With the aid of an external counter and control circuitry, this system can measure
resistances in the tens of gigohms.....(design idea added 6/07) |
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Integrator Forms Picoammeter - 07/17/97 EDN-Design Ideas:.....(design idea added
3/03) |
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Introduction to Time, Frequency and Modal Domains 5988-6765EN - Aligent
Application Note 1405-1 (added 4/08) |
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Invisible Broken Wire Detector - Circuit / schematic (added 02/05) |
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IR Digital Thermostat for FAN - ….(electronic schematic added 08/08) |
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IR Remote Control Tester - (circuit / schematic design added 6/06) |
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IR Remote Control Tester zen 22142 - (electronic design added 6/07) |
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IR Remote Volume Controller - ….(circuit design added 08/08) |
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IR Remote-Control Checker - Suitable for any Infra-red emitting device. 3V
battery supply (schematic added 6/07) |
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IRDCiP1202-A 300kHz Dual 15A 5.5VIN to 13.2VIN Dual Output Synchronous Buck Converter
using iP1202 - This board allows engineers to easily evaluate the iP1202 in an
independent and parallel configuration that is capable of providing up to 15A per
phase with double-sided heat sinking. (added 3/05) |
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IRDCiP2001-A 500kHz 40A 2-phase Synchronous Buck Converter using iP2001 - This
board enables engineers to easily evaluate the iP2001 in a 2-phase configuration that
is capable of providing up to 40A in a lab environment without airflow. (added
3/05) |
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IrOn-Off - ….(design added 08/08) |
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Isolated Ac Current Monitor - This circuit uses a small AC current transformer
from Magnetek to produce an isolated voltage proportional to the AC current in the
primary winding. The transformer contains a single turn primary with a low 0.001
ohm resistance. It can easily handle 30 amps of AC current and provides at least
500vac of isolation. With the components shown, the output AC voltage is scaled
so 1 amp of current produces 100mv of AC voltage. ….(designed by David A. Johnson) |
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Isolated circuit monitors AC line - 07/05/07 EDN-Design Ideas: A simple
circuit develops a square wave whose pulse width is proportional to the mains-voltage
level.....(design idea added 08/07) |
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Isolated clock source acts as test generator - 03/19/09 EDN- Design Ideas, A
cost-effective approach to implementing an isolated clock source uses a high-speed
optocoupler with low input-to-output capacitance.....(design idea added 08/09) |
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Isolated Probe - This probe allows connecting to such 'floating' circuits to a
normal scope input. As seen in the circuit, it is based on using an optocoupler.
The one shown in the diagram is a dual unit, but I had a pile of them here, so thats
what I used. ….(design added 08/08)) |
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Jitter Measurement Techniques - Pericom Semiconductor Application Brief # 036 (app
note added 2/05) |
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Jitter Measurements using Eye Patterns Test Report #1 - National Semiconductor
Application Note (app note added 2/06) |
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Keys finder - The ear and mouth of the circuit is a piezoelectric buzzer. Fizzling
in a frequency of 3...4 KHz produced sound waves that piezoelectric buzzer converts
them to an oscillation. This oscillation passes thought C1 and thought inverters
N1...N3.The inverters along with R1 and R2, compose an amplifier with gain 400 ! .The
C8 and C9 stabilize and reduce the signal's level.….(design added 08/08) |
