|
Opto-Isolator Coupler
Circuits, Page 3
Opto Isolators: #'s - J
K - O
P - Z
Last Updated on:
Friday, June 04, 2021 01:53 PM |
|
|
Links to electronic circuits, electronic schematics and designs for engineers,
hobbyists, students & inventors:
|
|
|
|
Phone wire, RJ 11 jacks and optocouplers build a bus - 7-Dec-04
Issue of EDN Although cutting-edge technology reaps publicity, the
real world often runs on modest hardware that's just "good enough" for home
automation, alarm systems, and equipment-monitoring applications. Figure 1
shows a low-speed, multidrop digital data network that uses inexpensive
optoisolators, telephone jacks, and two-pair wiring.... [Design Idea by
Ernie Deel, EFD Systems, Marietta, GA] |
|
RS-232C circuit has galvanic isolation - 04-Feb-99 Issue of EDN
Galvanic, or electrical, isolation is a well-established technique for noise
reduction and works best in computer and industrial systems in which noise
can seriously affect data transfer. Isolation removes ground-loop currents
and their associated noise voltages from data lines....file has several
circuits, scroll to this one.... [Design Idea byIoan Ciascai, REI Data,
Napoca, Romania] |
|
RS-232-to-RS-232 Port Powered Optical Isolator - Brochure with
schematic in PDF format / (added 7/02) |
|
Schematic of a Test Fixture for testing JFETs - (electronic
circuit added 08/08/08) |
|
|
|
Signal-powered linear optocoupler
provides isolated control signal - 23-Jul-09 Issue of EDN-Design
Ideas....The circuit in Figure 1 provides an isolated control voltage, such as 0 to
10V. In the low part of the range, 0V to approximately 2V, the controlled device is
off. Therefore, the upper part of the range must be as linear as possible. You can
meet this requirement using a linear optocoupler, such as Vishay’s IL300 or Avago
Technologies’ HCNR200 or HCNR201…. [Design Idea by Mitja Rihtarsic, ?kofja Loka,
Slovenia] |
|
|
|
|
|
Square Wave Driver Has Flexible Outputs - This circuit can produce an output
signal ranging from DC to 100KHz. It can source a voltage ranging from 1v to 30v. It
can sink a voltage ranging from zero volts to –30v. It can drive up to 200ma of
current and can even be switched to a floating tristate output. …. [Designed by David
A. Johnson] |
|
Temperature sensor uses I2C isolator - 6-Jun-96 Issue of EDN You can
couple an LM75 digital output-temperature sensor through an isolated I2C (interintegrated
circuit] interface (see Reference] as shown in Figure 1. Electrically isolating the
sensor allows operation in situations prone to high common-mode voltages; it's also
useful in breaking ground loops. IC1 and IC2 comprise a bidirectional isolator....
[Design Idea by Jerry Steele, National Semiconductor, Tucson, AZ] |
|
Time to Dust Indicator - I thought about this circuit when I heard that a
lot cleaning personal in hotels were either dusting rooms more often than necessary or
not enough. I have not yet built and tested this circuit completely but in concept it
should work. The circuit draws very low current from a +3v battery and could be housed
in a package similar to a small ashtray. The assembly might be placed in a suitable
out of the way area to collect dust. It would alert a maid when it was time to dust
the room. The circuit detects dust with an infrared LED that is pulsed so its….
[Designed by David A. Johnson] |
|
Tube Line Driver/Preamp - Published in Glass Audio #2/1993 (Circuit
design added 08/08/08) |
|
TV/Radio Antenna Cable Galvanic Isolator - A ground loop in your AV system
caused by antenna connection or TV cable is very common if you have your computer
connected to the same system. This type of ground loop problem can be solved by
using suitable isolation between your AV system and the antenna cable. The simplest
way to get rid of the hum is to disconnect the antenna cable from the AV system. If
you still want to watch cabe TV or listen to your radio an keep the system hum free
then you have to install isolators to all those antenna cable connections your system
has.... [Circuit design by Tomi Engdahl] |
|
Vacuum Tube Opamp Circuit - Published In Glass Audio #3/1995 (Circuit
design added 08/08/08) |
| |
|
|
|
