Index of /Test Equipment, Meters & Measurement/Misc Test Equipment/Circuits/
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25-kV generator tests insulation.pdf 27-Nov-2023 01:34 70539
A Practical Gain Set.pdf 09-Nov-2023 03:08 772165
Absorption Wavemeter.pdf 29-May-2020 03:16 75206
Accuracy Tester for Mechanical Watches.pdf 13-Aug-2023 00:01 1793019
Accurate Gain-Phase Measurement up to 2.5GHz.pdf 04-Mar-2020 02:54 208921
Accurate Op-Amp Bridge.pdf 16-Oct-2023 01:59 71627
Active DC Load.pdf 26-Sep-2023 23:27 292943
Add a meter to the ETI-560 Mains Cable Seeker 1..> 23-Mar-2024 05:09 166314
An Inexpensive Time Domain Reflectometer.pdf 26-Sep-2022 04:25 154045
Anemometer.pdf 20-May-2020 04:21 2258484
Applause Meter Circuit only.gif 16-Feb-1997 20:01 14667
Applause Meter.pdf 22-Jul-1998 22:22 130499
Audible Conductance Tester.jpg 03-Mar-2024 21:14 167597
Audible Continuity Tester.pdf 31-Jan-2022 06:50 71116
Audio-Visual Continuity Tester.pdf 23-Oct-2023 23:29 265122
Auto Service Meter.pdf 06-Jan-2024 05:58 806146
Beat-Frequency Indicator.pdf 21-Mar-2020 22:26 47711
Blown Fuse Indicator.pdf 26-May-2004 07:00 114086
Blown Fuse Indicators.pdf 31-May-2009 04:02 172917
Breakdown Voltage Meter.pdf 20-May-2014 01:28 28850
Bridge Circuit Meter Substitute.pdf 26-May-2004 07:00 81863
Build A Pair Of Lazy Leads.pdf 23-Jun-2009 04:48 51825
Build a Seismograph Part 1 ETT 1989-12.pdf 27-Jul-2020 00:25 6029947
Bus-Line Tracer.pdf 08-Apr-2023 02:43 223316
CLMeterB_Schematic.pdf 13-Dec-2009 21:48 218128
Cable Reflection Tester.pdf 08-Feb-2020 18:40 3163389
Cable Tester - Go-No Go.pdf 28-Mar-2005 13:55 157859
Cable Tester ETI559.pdf 18-Jun-2023 21:26 3078440
Capacitance Substitution Box.pdf 16-Feb-2020 01:24 3125735
Capacitive Liquid Level Measurement.pdf 01-Nov-2023 23:39 1091012
Carvalyzer to Service Tube Car Radios.pdf 12-Feb-2020 22:55 206190
Center Zero Led Bar-Dot Meter.pdf 21-Feb-2006 04:29 84779
Chart Recorder Plots Total Loads in Several Cir..> 25-Jun-2010 02:18 120222
Circuit Breaker Substitution Box.pdf 19-Jul-2009 20:50 29481
Circuits Designed for a Cruel and Unyielding Wo..> 04-May-2016 23:02 1061694
Climate Logger.pdf 21-Jul-2020 22:09 3809830
Constant Current Dummy Load.pdf 26-May-2004 07:00 116529
Contact Tester Quantifies Open-Short Circuit Te..> 26-May-2004 07:00 213806
Contactless AC Mains Voltage Detector.zip 20-May-1999 19:19 5969
Continuity Checker.zip 26-May-2004 07:00 84773
Continuity Tester (2).pdf 24-Feb-2020 23:41 52925
Continuity Tester (3).pdf 08-Jun-2020 20:41 3964783
Continuity Tester (4).pdf 25-Aug-2020 21:31 3964294
Continuity Tester (5).pdf 06-Sep-2023 03:42 565723
Continuity Tester 1.pdf 19-Jul-2009 22:04 26816
Continuity Tester 2.pdf 06-Dec-2009 06:03 94281
Continuity Tester.pdf 23-Feb-2020 04:11 277156
Crystal Controlled Gate Dip Meter.pdf 01-Mar-2024 04:10 2088660
Current Flow Indicator.pdf 20-Aug-2009 05:13 24293
Current Transmitter Calibrator.pdf 26-Jul-2009 03:50 102187
DC Lamp Failure Indicator.pdf 31-May-2009 03:46 15599
Dc Voltage Or Current Meter.pdf 26-May-2004 07:00 17278
Dead Short Tester.pdf 26-May-2004 07:00 80937
Design a 100A Active Load to Test Power Supplie..> 12-Nov-2022 02:11 967265
Designing Instrumentation Circuitry with RMS-DC..> 29-Mar-2011 01:54 1200893
Deviation Meter.pdf 16-May-2024 02:48 212904
Differential Audio Distortion Analyzer.pdf 26-May-2004 07:00 598735
Digital Clock and Thermometer.pdf 27-Aug-2020 01:33 1727059
Digital IC Breadboard.pdf 01-Jun-2009 04:28 533578
Digital Insulation Tester (Requires firmware do..> 12-Jan-2024 02:03 4742306
Digital Phototachometer.pdf 06-Jul-2020 03:55 719804
Digital Pressure Gauge.pdf 23-May-2009 05:25 687844
Digital Strobe to Measure RPM.pdf 04-Jul-2023 02:24 8385599
Digital Wind Speed Meter.pdf 16-Mar-2002 04:58 771125
Diode Matrix Tester.pdf 26-May-2004 07:00 147880
Dip Switches To Isolate Faults In A System.pdf 26-May-2004 07:00 1048661
Distortion Measurement.jpg 28-Sep-2011 18:59 142361
Earth Warning Indicator.pdf 10-Oct-2009 04:38 15292
Electric Fence Tester ETI 1512.pdf 06-Apr-2023 01:37 3703250
Electronic Stethoscope.pdf 07-Oct-2009 05:34 286076
Electroscope.pdf 20-Dec-2023 05:25 3522828
Electroscopes & Geiger Counters.pdf 18-Mar-2020 23:04 6865120
Engineer's Stethoscope.pdf 02-Jun-2010 05:14 300147
Environmental Test Chamber.pdf 26-May-2009 02:42 540727
Fart Strength Meter.pdf 20-May-1999 20:30 191989
Fiber-Optic Strand Checker.pdf 23-Oct-2020 00:22 156687
Filter to Measure Power Line Harmonics.pdf 14-Sep-2009 01:57 75563
Flexible Fault Detection With Reed Coil Relays.pdf 26-May-2004 07:00 98496
Fluxmeter Input For Dmm.pdf 26-May-2004 07:00 46096
Four Test Gadgets made with a single hex invert..> 21-Dec-2020 05:57 154890
Fraser Technologies Ltd Applause Meter.pdf 16-Apr-2017 19:28 337056
Geiger Counter.pdf 17-Jul-2020 23:09 1492776
Gigaohm Decade Resistance Box.pdf 07-Jan-2024 01:48 1142562
Graphic Level Meter 2100.zip 16-Mar-2000 05:01 32151
High-Low Logic Tester.pdf 01-Jun-2009 03:27 59422
High-Performance Dc Voltmeter Converter.pdf 26-May-2004 07:00 14541
ICs for Test Instriments.pdf 18-Nov-2023 22:42 577854
Indicators for All Occasions.pdf 23-Feb-2020 22:44 824276
Infrared Remote Tester.pdf 26-Jul-2020 01:20 461159
Instrument Read Out in Braille Comments.pdf 06-Aug-2009 05:43 26862
Intelligent Cable Tester.pdf 26-May-2004 07:00 3664238
Interface Panel.pdf 09-Jun-2022 04:58 105811
KRS Distance Measuring Device Interface Board.pdf 20-Sep-2009 19:54 48054
LED Visual Data Monitor.jpg 04-Jun-2019 03:41 295038
Lampkin 205A Deviation Meter.pdf 26-Jul-2020 22:11 1551067
Leakage Tester.pdf 24-Oct-2009 02:38 139413
Line Frequency Meter.pdf 02-Jan-2010 06:31 21747
Linear Scale Frequency Meter PCB ETI 150.pdf 06-Jan-2024 02:16 286704
Liquid Level Alarm.pdf 19-Oct-2010 03:57 155093
Live Wire Scanner for 220V.pdf 03-Aug-2020 23:34 154874
Load-transient-response for voltage regulators.pdf 16-Aug-2023 01:13 2128763
Locate Faults In Coaxial Cables.pdf 26-May-2004 07:00 631097
Low Cost Weigh Scales.pdf 13-Jan-2020 23:29 436509
MEASURING MAGNETIC FIELDS.pdf 14-Apr-2022 01:19 2491827
Magnetic Field Detector.pdf 16-Jul-2022 03:26 407167
Magnetic Field Sensors.pdf 30-Jul-2022 01:05 505232
Magnetometer.pdf 12-Nov-2022 02:24 482007
Mains Cable Seeker.pdf 09-Aug-2020 04:20 855027
Make 4 Test Gadgets from one Hex Inverter IC.pdf 12-Feb-2024 05:15 154889
Making Use of Audio Indicators.pdf 06-Nov-2023 22:01 1020544
Making a Wheatstone Bridge.pdf 03-Jul-2020 21:21 3580206
Maximum Voltage Detector.pdf 23-May-2009 04:42 58769
Measurement and Control Circuits Collection.pdf 13-Mar-2020 04:51 3924593
Measuring Complex Impedances.pdf 30-Oct-2009 03:19 191352
Measuring Insulation Resistance.pdf 21-Feb-2020 04:43 303997
Measuring Large Currents.pdf 07-Feb-2020 05:14 4973455
Measuring Light Intensity.pdf 02-Mar-2020 22:00 75464
Measuring Nanoamperes.pdf 27-Sep-2009 02:13 1517628
Measuring Standby Power Of Cmos Rams.pdf 26-May-2004 07:00 47036
Measuring Temperatures on Computer Chips.pdf 03-Jul-2020 21:30 126871
Measuring relative humidity.pdf 27-Dec-2020 01:14 1140268
Microwave Oven Analyzer.pdf 07-Feb-2020 05:49 3218276
Mini-Metrology Lab.pdf 26-May-2004 07:00 1301343
Modem Tester.zip 13-Nov-2003 06:47 135897
Motor Speed Measurement Circuit.pdf 03-Feb-2018 00:00 752437
Multiple Test Point Monitor.pdf 18-Mar-2020 23:01 5658277
Old School Instruments and Accessories.pdf 26-Feb-2022 02:29 8076766
Opacity Measurement.pdf 04-Nov-2023 03:15 1401784
Overload Proof Current Indicator.pdf 11-Jan-2009 23:59 83646
Passive Distortion Measuring Network.pdf 22-Oct-2009 04:38 39958
Phase Measurement With A Pll.pdf 26-May-2004 07:00 161755
Piezoelectric driver finds buzzer's resonant Fr..> 08-Oct-2023 01:59 366398
Pipe and Cable Locator.pdf 17-Jul-2020 23:09 1708569
Pola Testers.pdf 23-Jun-2009 04:15 579647
Polarity Sensing Continuity Tester.pdf 26-May-2004 07:00 68511
Ponyprog.zip 26-May-2004 07:00 195255
Portable Gas Detector.pdf 19-Jan-2021 03:47 186589
Power Failure Indicator.pdf 13-Jul-2023 01:38 298620
Power Meter with 1 Percent Accuracy.pdf 20-Sep-2009 23:28 105948
Power Supply Tester.pdf 29-Jun-2018 22:09 674729
Precision Electroscope.pdf 26-Jun-2022 23:45 91490
Precision active load operates as low as 2V.pdf 16-Aug-2023 01:05 90731
Precision voltage-controlled current sink tests..> 26-Sep-2023 03:54 116045
Pulse Width Range Detector.pdf 10-Jun-2010 04:22 96330
Quicktracer.zip 26-May-2004 07:00 884671
R&C Substitution Boxes.pdf 30-Sep-2020 03:27 1399106
RF Exposure Test Methods.pdf 12-Sep-2009 02:42 409055
Radiation Monitor.pdf 04-Jan-2010 03:56 2135767
Radon Monitor Part 2.pdf 16-Nov-2003 07:29 751365
Relative Humidity Gauge.pdf 09-Mar-2020 00:45 750013
Relative Humidity Measurement.pdf 24-Aug-2020 00:01 191321
Resistance Bridge.pdf 22-Nov-2022 23:51 485151
Resistance Decade Box (2).pdf 22-Nov-2022 23:53 738964
Resistance Decade Box.pdf 23-Jul-2009 05:17 291321
Resistor Bank.pdf 18-Dec-2023 21:28 440743
Rf Voltmeter.pdf 26-May-2004 07:00 15522
Salt Concentration Meter.pdf 02-Feb-2004 05:18 216269
Sanatron Current Timebase.pdf 20-May-2014 01:27 39488
Self Powered Dummy Load.pdf 16-Aug-2009 23:44 91730
Series Wired Christmas Light Tester.pdf 17-Apr-2024 03:18 109003
Setting up your oscilloscope to measure jitter.pdf 14-Dec-2022 00:53 262016
Short Circuit Detector.pdf 30-Nov-2023 04:04 57595
Short Circuit Finder.pdf 03-Dec-2023 23:53 76411
Signal and Voltage Indicators.pdf 23-Aug-2009 02:37 192185
Simple Impedance Bridge.pdf 20-Sep-2023 21:48 352379
Simple LED Mains Tester.pdf 08-Jul-2023 02:48 818325
Simple Test Circuits.pdf 18-Aug-2020 00:33 1294492
Sobriety Tester.zip 13-Nov-2003 06:25 150056
Soil Moisture Meter.pdf 12-Apr-2009 17:20 245333
Solar Dosimeter.pdf 14-Aug-2020 19:46 2757951
Solar Panel Simulator to test circuits.pdf 03-Jun-2010 04:04 143612
Sure Luck Ohms - Resistor Value Identifier.pdf 29-Aug-2020 02:24 4465963
Surface Mount Part Ic Codes.zip 26-May-2004 07:00 289453
Switchable Test Socket.pdf 04-Mar-2020 23:44 291921
Switched Load To Test Power Supply Reponse.pdf 06-Dec-2004 05:08 74007
TIME -FREQUENCY MEASURING SYSTEM Part 2 73 1973..> 30-Nov-2023 23:39 1606028
Telco In A Box Corrections.pdf 26-May-2004 07:00 192382
Telco In A Box.pdf 26-May-2004 07:00 561198
Telephone Tester-Off Line.zip 26-May-2004 07:00 54931
Temperature Adapter for Multimeter ETI 153.pdf 26-Sep-2023 23:43 3829695
Temperature Indicator.pdf 08-Jan-2024 03:14 498499
Test Unit for Sequential Logic.pdf 09-Jul-2023 04:04 817065
Tester For Dip Switches.pdf 26-May-2004 07:00 116026
The Wagner Bridge.pdf 26-Sep-2009 04:56 233614
Thermal Resistance Automatic Test Setup.pdf 25-Jun-2010 02:09 118038
Thermocouple interface to micrcontroller.pdf 22-Oct-2022 20:30 688753
Time Voltage Calibrator.pdf 21-Jul-2009 04:39 1299138
True RMS Detector.pdf 30-May-2024 03:24 71474
True Rms Converter.pdf 26-May-2004 07:00 18102
Ultrasonic Listener.pdf 29-Apr-2020 22:57 1093372
Usimg a DMM to measure capacitance.pdf 14-Jan-2009 05:47 50059
Using Conductance to Check Out Electronic Compo..> 29-Nov-2009 07:20 899506
Using Tune Up Instruments.zip 07-Jun-2004 07:00 1179755
Utility Amplifier - Lab Power Supply.pdf 29-Sep-2023 23:20 1208251
Utlilty Amplifier-Supply for the experimenter's..> 17-Nov-2023 01:13 4410981
V & I Calibrator.pdf 01-Nov-2023 23:40 479520
Versatile Tester with Audio Indication.pdf 21-Nov-2023 02:43 443619
Voltage & Continuity Tester.pdf 21-Feb-2022 05:11 474664
Voltmeter for the Blind.pdf 07-Dec-2009 04:53 56682
Water Level Indicator.pdf 20-Aug-2009 05:14 17500
Wavemeter for Hams and CBers.pdf 08-Jun-2009 05:43 158150
Winking LED Resistance Bridge.pdf 23-Apr-2014 03:52 102189
Zero Marking of AC Waveforms.pdf 04-Dec-2020 00:22 469976