Testers or Instruments Electronic Circuits, beginning with S

Tester or Instrumentation Circuits, Page 12
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:

Salt-Taster - Detects the amount of salt contained in liquid foods (added 3/05)

Schematic of a Test Fixture for testing JFETs - (electronic circuit added 08/08/08)

Scheme Detects Shorts - 07/08/99 EDN-Design Ideas: [Note: File contains multiple circuits. Scroll to find this one.] When you manually assemble complex boards, it's common to short-circuit adjacent component or IC pins. Determining which section of the circuit you have shorted is not too difficult, but finding the precise point.....(design idea added 2/06)

Scheme provides High Side Current sensing for White LED Drivers - 02/19/04 EDN-Design Ideas: White LEDs find wide use in backlighting color-LCD screens in most portable devices, such as cellular phones, PDAs, and MP3 players. Multiple LEDs often connect in series to ensure that the same current flows through every LED. To forward-bias these LEDs, a voltage of 10 to 16V.....(design idea added 1/05)

Scope Probe Measures High Frequencies - 01/18/96 EDN-Design Ideas: (design idea added 3/03)

Selecting the Optimum Test Tones & Test Equipment for Successful High Speed ADC Sinewave Testing - Maxim Application Notes / 1819 / Sep-08 (app note added 5/08)

Self Oscillating Amplifier for Distortion Testing - allows the home constructor to make quite accurate measurements, without having to spend a lot of money on a low distortion oscillator (added 5/02)

Self-powered Fast Battery-Tester - Tests 1.5 to 15 Volt cells. Two-LED display, no power supply required. (electronic circuit added 06/07/08)

Sense Milliamps to Kiloamps and Digitize to 12 Bits - DN227 Design Notes (Linear Technology) (app note added 1/06)

Sensitive Remote Control Tester - (circuit / schematic design added 6/06)

Serial port tests digital circuits - 06/25/09 EDN.....(design idea added 08/09)

Serial port tests digital circuits - A PC’s serial port provides signal lines that you can use to expand the number of input signals. With some additional circuitry tied to these lines, you can use the port to test digital TTL logic-level circuits. You just need to convert the TTL logic levels to RS-232 voltages and add a multiplexer to increase the number of signals that the serial port can sense..... (Test Ideas: Test & Measurement World 4/01/2009)

Set/Reset Flip Flop - (electronic design added 10/06)

Setup Tests Bit Error Rate - 03/18/04 EDN-Design Ideas: Traditionally, the reception quality of a digital receiver is expressed in terms of BER (bit-error rate). This figure is the proportion of received bit errors in a given period. Typically, you measure the BER in the lab by applying an RF signal, modulated by a pseudorandom code, to the receiver under test.....(design idea added 1/05)

Testers Next S's

Testers: #'s A-B C D E F-G H-K L M-O P Q-R S T U V-Z