Testers or Instruments Electronic Circuits, beginning with S

Tester or Instrumentation Circuits, Page 12a
Testers: #'s A-B C D E F-G H-K L M-O P Q-R S T U V-Z
Last Updated on: Friday, March 12, 2010 12:07 PM

Circuits Designed by Dave Johnson, P.E. :

Solar Cell Test Fixture
If you are considering building your own solar panel, you might try building the solar cell tester shown below. When constructing a solar panel it is important to make sure that all the solar cells used in the panel be closely matched for their short circuit current. One weak cell will lower the efficiency of the whole panel. The system shown allows individual solar cells to be tested for their short circuit current under a constant light intensity condition....

Solar PV cell Test Fixture
This is an illustration of a test fixture, which can be used to test individual solar cells for short circuit current. Using a PIN photo diode and a control circuit, the solar cells can be tested under constant light level conditions. A halogen incandescent lamp is used as the light source. (added 7/06)

Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

Short Circuit Beeper #2 - (electronic circuit added 1/05)

Short Circuit Finder uses Few Parts - 11/05/98 EDN-Design Ideas: (design idea added 3/03)

Short-Circuit Beeper - (schematic / circuit added 6/07)

Short-Circuit Protection for Boost Regulators - DN154 Design Notes (Linear Technology) (app note added 1/06)

Signal Conditioning Precisely indicates Humidity - 02/02/98 EDN-Design Ideas: The circuit in Figure 1 translates the level of humidity from0 to 100% into a stable, respective dc signal of0 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 of0.8 to 4.0V.....(design idea added 4/02)

Signal Tracer - The main part of this circuit is the LM386 amplifier chip. It also uses a transistor input to buffer the input signal and provide extra gain for the LM386. The little unit has helped me out on numerous occasions when trouble shooting any amplifier circuit like a stereo receiver, tv / vcr audio section, radios, cd players and car stereos….(added 05/08)

Signal Tracer and Injector - ….(electronic schematic added 03/08)

Signal-to-noise-meter - (circuit design added 07/07/07)

Signature Analyser - A component signature analyser that allows in-circuit parts tests (schematic added 6/07)

Simple 6 Digit 40MHz Frequency Counter Module - Here is the design for a very low cost 6-digit frequency counter module using of the shelf components (and not that expensive 74C926!). The standard circuit will display directly in Hz (1MHz max), and there is a separate on board divider that will allow you to display directly in KHz (approx 40MHz max). Because the display... (add 11/05)

Simple BER meter is easy to Build - 03/02/00 EDN-Design Ideas: A bit-error-rate (BER)tester is a basic tool for digital-communications measurements. Although many commercial BER testers are available, you can easily design and build an inexpensive version. The scheme in Figure 1 has performance similar to that of a.....(design idea added 7/03)

Simple blown fuse indicator sounds an alarm - 07/10/08 EDN-Design Ideas: A simple blown-fuse-indicator circuit sounds a buzzer and flashes an LED when a fuse blows.....(design idea added 009/08)

Simple but reliable car battery tester - ….(circuit design added 03/08)

Simple Car Battery Charger psimages - This very simple circuit uses a transformer ,two diodes , a capacitor and an ammeter. To charge a battery just connect + and terminals of circuit to corresponding terminals of battery. When battery is not charged, ammeter reading shows 1-3 amps.....(added 10/05)

Simple car battery tester - This circuit uses the popular and easy to find LM3914 IC. This IC is very simple to drive, needs no voltage regulators (it has a built in voltage regulator) and can be powered from almost every source…(electronic circuit added 05/08)

Simple circuit detects DC ringing - 08/17/00 EDN-Design Ideas: (design idea added 2/06)

Simple Circuit Detects Loss of 4-20 mA Signal - National Semiconductor Application Note (app note added 2/06)

Simple circuit produces a less thAN 25 nsec pulse - 05/11/00 EDN-Design Ideas: (design idea added 2/06)

Simple circuit provides high side Current sensing - 04/24/97 EDN-Design Ideas: (design idea added 8/03)

Simple circuit Serves as milliohm meter - 04/15/04 EDN-Design Ideas: When I was recently debugging a design, I discovered that a short circuit existed from a ground plane to a power plane. I did not have access to a milliohm meter or an equivalent tester for locating this type of short circuit. So, I logged onto the Internet to find an easily constructible milliohm meter.....(design idea added 1/05)

Simple circuit serves as milliohmmeter - 04/15/04 EDN-Design Ideas: When I was recently debugging a design, I discovered that a short circuit existed from a ground plane to a power plane. I did not have access to a milliohmmeter or an equivalent tester for locating this type of short circuit. So, I logged onto the Internet to find an easily constructible milliohmmeter.....(design idea added 04/04)

Simple Component and Continuity Tester - This simple project can be used to test components, circuit board tracks, wires and connections....Designed by John Hewes (circuit added 06/07/08)

Simple dual constant current load tests low current power supplies - 06/21/07 EDN-Design Ideas: You can use a simple 9V-battery-powered constant-current load to test small power supplies at various loads.....(design idea added 9/08)

Spectrum Analyzer Measurements and Noise - Aligent Application Note (app note added 6/07)

Speed IM testing - Application Note MiniCircuits.com (app note added 04/05/06)

Sprague TO-5 Tel-Ohmike capacitor analyzer manual w/schematic - (circuit added 07/07/07)

Sprague TO-6A Tel-Ohmike capacitor analyzer manual w/schematic - (circuit added 07/07/07)

Standardized Core Makes Building and Supporting a Functional Test System Easier and Less Costly - Agilent Application Note (added 6/06)

Stereo Test Tone Generator - The purpose of this circuit is to create a pair of sine waves for testing stereo equipment. While it is useful for many types of audio test tone generation, the circuit is specialized for the purpose of aligning ….(diagram added 05/07)

Storage Oscilloscope Adapter - Yes, it's finally here !. The DSOA Mk3 has been a long time coming (many years in fact), but it was finally published in the October/November 98 issues of EA. EA October 98 issue cover shot of DSOA Mk3 Here are the basic specs….(electronic schematic added 11/08)

Strain Gauge Sensor #2 - (circuit / schematic added 6/05)

Stress Meter - This project comes with all parts, PC board and a pre-programmed chip for STRESS METER. But you are encouraged to add more sub-routines to the program and learn to program the chip yourself. You will need the "Chip Programmer Model F" and the software provided below....(circuit design added 05/07)

Sudden Ionospheric Disturbance SID Receiver - (schematic / circuit added 6/07)

Sudden Ionospheric Disturbance SID Receiver #1 - (circuit / schematic added 6/05)

Sudden ionospheric disturbance SID receiver #2 - (circuit / schematic added 6/05)

Supervisory circuit monitors modem connection - 04/09/98 EDN-Design Ideas: (design idea added 6/06)

Supervisory IC Makes Simple Line Monitor - 03/01/96 EDN-Design Ideas: (design idea added 6/06)

S-video to RCA - ….(circuit design added 08/08)

Sylvania 145 Audio Oscillator schematic - (circuit added 07/07/07)

Synthetic Isolators - great for checking the SWR of antennas, amplifiers, mixers, etc. - (circuit added 07/07/07)

System Cabling Errors and DC Voltage Measurement Errors in Digital Multimeters 5988-5511EN - Aligent Application Note 1389_1 (app note added 4/08)

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