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Optic Circuits
Optic / Optical Circuits:   #'s - K      L - Z

  Last Updated: October 24, 2017 02:55 PM

Circuits Designed by Dave Johnson, P.E. :

100Khz Low Power Light Receiver -  By starving a high speed logic inverter for current, this circuit can produce a sensitive 100KHz light receiver circuit, which is immune to ambient light, but only drawing 100 microamps from a 3 volt supply . . . Hobby Circuit designed by Dave Johnson P.E.-April, 2005

10Mhz to 20Mhz Light Receiver -  Light power to volts conversion = APPROX.15mV per microwatt at 850nM. . . Circuit by David Johnson P.E.-July, 2006

175Khz Inductive Pulse Receiver -  This circuit is discussed in more detail in the Experimenters Journal.  The receiverís six inch diameter coil detects the ring signal from the above transmitter and use a single NPN transistor to provided enough amplification for the signal to be easily viewed on an oscilloscope. . . Circuit by Dave Johnson P.E.-June, 2000

1Khz to Over 70Mhz Light Receiver -  This circuit uses one tiny C-MOS inverter IC to form a modulated light receiver with a very fast response.  It is designed around a PIN photo diode that is packaged for use with plastic optical fibers.  It can be used as an optical fiber receiver.  By using the open end of the optical fiber it can "sniff" out any modulated light signals . . . Hobby Circuit designed by David Johnson P.E.-June, 2000

1Khz to Over 70Mhz Light Receiver -  This circuit uses one tiny C-MOS inverter IC to form a modulated light receiver with a very fast response.  It is designed around a PIN photo diode that is packaged for use with plastic optical fibers.  It can be used as an optical fiber receiver.  By using the open end of the optical fiber it can "sniff" out any modulated light signals . . . Hobby Circuit designed by Dave Johnson P.E.-June, 2000

1us LED Pulse Driver + Voltage to Frequency Converter -  This circuit receives the signal from the above amplifier and launches powerful 1uS infrared light pulses from a low cost LED that are frequency modulated by the audio information.  The 10KHz center frequency of the pulse stream is low enough so a standard . . . Hobby Circuit designed by David A. Johnson P.E.-March, 1999

2Mhz Broad Band Optical Fiber Receiver -  If you need more sensitivity than the above circuit this circuit provides about ten times more gain.  It too is designed around an inexpensive plastic optical fiber detector . . . Hobby Circuit designed by David A. Johnson P.E.-June, 2000

2Mhz Broad Band Optical Fiber Receiver -  If you need more sensitivity than the above circuit this circuit provides about ten times more gain.  It too is designed around an inexpensive plastic optical fiber detector . . . Hobby Circuit designed by Dave Johnson P.E.-June, 2000

2uS Light Pulse Receiver -  Although the LF357 is an obsolete part, this circuit gives you an idea how to build a sensitive modulated light detector with high ambient light immunity.  The first section uses a 100mH inductor as an efficient photodiode current to voltage conversion circuit. . . Circuit by David A. Johnson P.E.-June, 2002

30Khz Light Receiver Amp -  This circuit uses NPN darlington transistor to amplify the signal produced from short light flashes, as detected by a PIN photo diode.  The circuit draws only about 330uA from a 6v battery. . . Circuit by Dave Johnson P.E.-March, 2002

40Khz Light Receiver Amp -  This circuit is similar to 30KHZ LIGHT RECEIVER AMP  but provides more gain and operates up to 40KHz.  However it draws more power supply current.. . . Circuit by David Johnson P.E.-March, 2002

50Mhz Broad Band Optical Fiber Receiver Version A -  If the above circuit it still too slow, you can try this circuit.  What it lacks in sensitivity it makes up for in speed.  The circuit attaches a plastic fiber optic PIN photodiode assembly to a small box containing a small 3v battery and a standard. . . Circuit by Dave Johnson P.E.-June, 2000

5Mhz Broad Band  Optical Fiber Receiver -  This circuit is a simple broad band light detector that uses a very inexpensive IC and a PIN photodiode that is packaged for use with plastic optical fibers.  It has a bandwidth from 1KHz to over 5MHz.  It is great for experimenting with various modulated. . . Circuit by David A. Johnson P.E.-June, 2000

5Mhz Broad Band  Optical Fiber Receiver -  This circuit is a simple broad band light detector that uses a very inexpensive IC and a PIN photodiode that is packaged for use with plastic optical fibers.  It has a bandwidth from 1KHz to over 5MHz.  It is great for experimenting with various modulated. . . Circuit by Dave Johnson P.E.-June, 2000

Broad Band 2Mhz Optical Fiber Receiver -  If you need more sensitivity than the above circuit this circuit provides about ten times more gain.  It too is designed around an inexpensive plastic optical fiber detector. . . Circuit by David A. Johnson P.E.-June, 2000

Broad Band 50Mhz Optical Fiber Receiver Version A -  If the above circuit it still too slow, you can try this circuit.  What it lacks in sensitivity it makes up for in speed.  The circuit attaches a plastic fiber optic PIN photodiode assembly to a small box containing a small 3v battery and a standard . . . Hobby Circuit designed by David Johnson P.E.-June, 2000

High-speed 75MHz light receiver -  This circuit uses one tiny C-MOS inverter IC to form a modulated light receiver with a very fast response.  It is designed around a PIN photo diode that is packaged for use with plastic optical fibers.  It can be used as an optical fiber receiver.  By using the open end of the optical fiber it can "sniff" out any modulated light signals. . . Circuit by Dave Johnson P.E.-June, 2000


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

1 chip Detects optical interruptions -  03/01/01  EDN Design Ideas:  Setting up a light beam and detector to count objects on a conveyer belt, sense security intrusions, or drive a tachometer is simple.  However, the task is no longer trivial if you add ambient light or multiple beams, limit optical power, or extend the dis __ Circuit Design by Frederick M Baumgartner, FM Broadcast Services, Parker, CO

100Khz Low Power Light Receiver -  By starving a high speed logic inverter for current, this circuit can produce a sensitive 100KHz light receiver circuit, which is immune to ambient light, but only drawing 100 microamps from a 3 volt supply . . . Hobby Circuit designed by Dave Johnson P.E.-April, 2005

10Mhz to 20Mhz Light Receiver -  Light power to volts conversion = APPROX.15mV per microwatt at 850nM. . . Circuit by David Johnson P.E.-July, 2006

1 chip Detects optical interruptions -  03/01/01  EDN Design Ideas:  Setting up a light beam and detector to count objects on a conveyer belt, sense security intrusions, or drive a tachometer is simple.  However, the task is no longer trivial if you add ambient light or multiple beams, limit optical power, or extend the dis __ Circuit Design by Frederick M Baumgartner, FM Broadcast Services, Parker, CO

100Khz Low Power Light Receiver -  By starving a high speed logic inverter for current, this circuit can produce a sensitive 100KHz light receiver circuit, which is immune to ambient light, but only drawing 100 microamps from a 3 volt supply . . . Hobby Circuit designed by Dave Johnson P.E.-April, 2005

10Mhz to 20Mhz Light Receiver -  Light power to volts conversion = APPROX.15mV per microwatt at 850nM. . . Circuit by David Johnson P.E.-July, 2006

14.2mm wide Creepage & clearance optocouplers for high-voltage applications -  EDN Design Ideas:  08/05/2014     Not any optocoupler will do for applications requiring extra-high-voltage isolation __ Circuit Design by Avago Tech Note

175Khz Inductive Pulse Receiver -  This circuit is discussed in more detail in the Experimenters Journal.  The receiverís six inch diameter coil detects the ring signal from the above transmitter and use a single NPN transistor to provided enough amplification for the signal to be easily viewed on an oscilloscope. . . Circuit by Dave Johnson P.E.-June, 2000

1Khz to Over 70Mhz Light Receiver -  This circuit uses one tiny C-MOS inverter IC to form a modulated light receiver with a very fast response.  It is designed around a PIN photo diode that is packaged for use with plastic optical fibers.  It can be used as an optical fiber receiver.  By using the open end of the optical fiber it can "sniff" out any modulated light signals . . . Hobby Circuit designed by David Johnson P.E.-June, 2000

1Khz to Over 70Mhz Light Receiver -  This circuit uses one tiny C-MOS inverter IC to form a modulated light receiver with a very fast response.  It is designed around a PIN photo diode that is packaged for use with plastic optical fibers.  It can be used as an optical fiber receiver.  By using the open end of the optical fiber it can "sniff" out any modulated light signals . . . Hobby Circuit designed by Dave Johnson P.E.-June, 2000

1us LED Pulse Driver + Voltage to Frequency Converter -  This circuit receives the signal from the above amplifier and launches powerful 1uS infrared light pulses from a low cost LED that are frequency modulated by the audio information.  The 10KHz center frequency of the pulse stream is low enough so a standard . . . Hobby Circuit designed by David A. Johnson P.E.-March, 1999

2Mhz Broad Band Optical Fiber Receiver -  If you need more sensitivity than the above circuit this circuit provides about ten times more gain.  It too is designed around an inexpensive plastic optical fiber detector . . . Hobby Circuit designed by David A. Johnson P.E.-June, 2000

2Mhz Broad Band Optical Fiber Receiver -  If you need more sensitivity than the above circuit this circuit provides about ten times more gain.  It too is designed around an inexpensive plastic optical fiber detector . . . Hobby Circuit designed by Dave Johnson P.E.-June, 2000

2uS Light Pulse Receiver -  Although the LF357 is an obsolete part, this circuit gives you an idea how to build a sensitive modulated light detector with high ambient light immunity.  The first section uses a 100mH inductor as an efficient photodiode current to voltage conversion circuit. . . Circuit by David A. Johnson P.E.-June, 2002

30Khz Light Receiver Amp -  This circuit uses NPN darlington transistor to amplify the signal produced from short light flashes, as detected by a PIN photo diode.  The circuit draws only about 330uA from a 6v battery. . . Circuit by Dave Johnson P.E.-March, 2002

40Khz Light Receiver Amp -  This circuit is similar to 30KHZ LIGHT RECEIVER AMP  but provides more gain and operates up to 40KHz.  However it draws more power supply current.. . . Circuit by David Johnson P.E.-March, 2002

50Mhz Broad Band Optical Fiber Receiver Version A -  If the above circuit it still too slow, you can try this circuit.  What it lacks in sensitivity it makes up for in speed.  The circuit attaches a plastic fiber optic PIN photodiode assembly to a small box containing a small 3v battery and a standard. . . Circuit by Dave Johnson P.E.-June, 2000

5MBd Digital optocouplers targeting low power/low supply voltage applications -  EDN Design Ideas:  01/22/2015    Digital optocouplers provide high voltage insulation and noise rejection for data transmission, with very low power usage __ Circuit Design by Avago Tech Note

5Mhz Broad Band  Optical Fiber Receiver -  This circuit is a simple broad band light detector that uses a very inexpensive IC and a PIN photodiode that is packaged for use with plastic optical fibers.  It has a bandwidth from 1KHz to over 5MHz.  It is great for experimenting with various modulated. . . Circuit by David A. Johnson P.E.-June, 2000

5Mhz Broad Band  Optical Fiber Receiver -  This circuit is a simple broad band light detector that uses a very inexpensive IC and a PIN photodiode that is packaged for use with plastic optical fibers.  It has a bandwidth from 1KHz to over 5MHz.  It is great for experimenting with various modulated. . . Circuit by Dave Johnson P.E.-June, 2000

Accurate Characterization of Source Spectra using an Optical Spectrum Analyzer -  Application Note__ Aligent

ADN2841 Optical Evaluation Kit -  AN-630 Analog Devices App NoteThis application note describesADN2841 laser diode driver Rev. E1 evaluation kit. The evaluation kit is a demonstration board that provides optical evaluation ofADN2841. This document describes how to configureboard in order to operatepart optically.  - Designed by

ADN2847 AC-Coupled Optical Evaluation Kit -  AN-638 Analog Devices App NoteThis application note describes32-lead ADN2847 laser diode driver Rev. A1 evaluation kit. The evaluation kit is a demonstration board that provides ac -coupled opti cal evaluation ofADN2847. This document describes how to configureboard to operate se parts optically.  - Designed by

ADN2848 AC-Coupled Optical Evaluation Kit -  AN-637 Analog Devices App NoteThis application note describes32-lead ADN2848 laser diode driver Rev. A1 evaluation kit. The evaluation kit is a demonstration board that provides ac-coupled optical evaluation ofADN2848. This document describes how to configureboard in order to operate this part optically.  - Designed by

Agilent 71400 Lightwave Signal Analyzer -  Application Note__ Aligent

AN-263: Resolver to Digital Conversion; Simple Alternative to Optical Shaft Encoders -  AN-263 Analog Devices App Note - Designed by

AN-658: Optical Channel Identification on the ADN284x Laser Drivers Part I -  AN-658 Analog Devices App Note - Designed by

Avago Tech Note: 14.2mm wide Creepage & clearance optocouplers for high-voltage applications -  EDN Design Ideas:  08/05/2014     Not any optocoupler will do for applications requiring extra-high-voltage isolation __ Circuit Design by Avago Tech Note

Avago Tech Note: 5MBd Digital optocouplers targeting low power/low supply voltage applications -  EDN Design Ideas:  01/22/2015    Digital optocouplers provide high voltage insulation and noise rejection for data transmission, with very low power usage __ Circuit Design by Avago Tech Note

Avago Tech Note: Driving & protecting inverter IGBTs -  EDN Design Ideas:  06/12/2014     A special purpose optocoupler can solve your IGBT gate-drive and fault-feedback needs __ Circuit Design

Avago Tech Note: Fast analog isolation with linear optocouplers -  EDN Design Ideas:  06/12/2014    Implement isolated analog signals and current loops with linear optocouplers __ Circuit Design

Avago Tech Note: High-speed optocouplers enable industrial networks -  EDN Design Ideas:  06/13/2014    Communicate at up to 25Mb/s over (e.   g.) PROFIBUS __ Circuit Design by Avago Tech Note

Avago Tech Note: Optocouplers in intrinsic safety applications -  EDN Design Ideas:  02/16/2015   Intrinsic safety applications defined in IEC 60079-11 require careful selection of isolation components __ Circuit Design by Avago Tech Note

Avago Tech Note: Smart gate-drive optocoupler with integrated flyback controller -  EDN Design Ideas:  03/13/2015   A smart gate-drive optocoupler for FETs & IGBTs is ideal for distributed power supplies, power inverters, motor drives, and more __ Circuit Design by Avago Tech Note

Broad Band 2Mhz Optical Fiber Receiver -  If you need more sensitivity than the above circuit this circuit provides about ten times more gain.  It too is designed around an inexpensive plastic optical fiber detector. . . Circuit by David A. Johnson P.E.-June, 2000

Broad Band 50Mhz Optical Fiber Receiver Version A -  If the above circuit it still too slow, you can try this circuit.  What it lacks in sensitivity it makes up for in speed.  The circuit attaches a plastic fiber optic PIN photodiode assembly to a small box containing a small 3v battery and a standard . . . Hobby Circuit designed by David Johnson P.E.-June, 2000

Build an Optical Theremin -  Make music hands free! __ Contact Jameco Electronics

Circuit controls intensity of reflex optical sights -  02/21/02 EDN Design Ideas:  A popular category of aiming/pointing aids is the reflex, or "red-dot," sight.  This system finds use in such diverse applications as astronomy, archery, and shooting.  In the reflex sight, light from an internal source-typically a high-intensity red LED-reflects from a curved, transparent optical (reflex] element through which you view the target __ Circuit Design by Stephen Woodward, University of North Carolina, Chapel Hill, NC

Circuit Measures Optocoupler's Response Time -  09/08/11  EDN Design Ideas:  Measure the response speed of optocouplers in order to select matching devices.  You can use the circuit in this Design Idea to measure the attack and release times of photoresistor-type optocouplers (Figure 1).  Such devices often find use in audio compressors or volume-control circuits.  The design uses an oscillating Schmitt trigger with the optocoupler DUT (device under test) in the feedback loop.  The photoresistor and resistor R1 form a voltage divider that controls the input of the Schmitt trigger.   __ Circuit Design by Peter Demchenko, Vilnius, Lithuania

Control Intensity of Reflex Optical Sights -  02/21/02  EDN Design Ideas:  A popular category of aiming/pointing aids is the reflex, or "red-dot, " sight.  This system finds use in such diverse applications as astronomy, archery, and shooting.  In the reflex sight, light from an internal source-typically a  __ Circuit Design by Stephen Woodward, University of North Carolina, Chapel Hill, NC

Current Sources for Fiber Optic Lasers -  AN90 A large group of fiber optic lasers are powered by DC current. Laser drive is supplied by a current source with modulation added to the signal. The current source, although conceptually simple, constitutes an extraordinarily tricky design problem. There are a number of practical requirements for a fiber optic current source and failure to consider them can cause laser and/or optical component destruction. This application note describes ten laser current source circuits with a range of capabilities. High and low current types are presented, ___ Linear Technology/Analog Devices

Demodulator Makes Low Cost Optical Tracker -  06/18/98 EDN Design Ideas:  (Several circuits here, scroll to find this one.) Demodulator makes low-cost optical trackerSteven Sarns, Kesta Technology Inc, Wheat Ridge, CO  A project required building a synchronous-demodulator circuit to track a line drawn on paper.  The beauty of the synchronous-modulator/demodulator approach is its inherent noise rejection.  The method rejects nearly all out-of-band noise, whether from internal drift or external illumination.   __ Circuit Design by Steven Sarns, Kesta Technology Inc, Wheat Ridge, CO  

Design a Visible Optical Link for RS-232C Communications -  01/09/03 EDN Design Ideas:  Embedded processor directly drives LCD - The design in Figure 1 is a visible optical link for those who need to see the transmitted data.  An isolation figure ofthan 5000V is a bonus.  Tests of the system used the COM input of a data-acquisition system, as well as a standard PC's COM port.  The MC1489 converts the RS-232C data to TTL signals __ Circuit Design by Shyam Tiwari, Sensors Technology Ltd, Gwalior, India


Optic / Optical Circuits:   #'s - K      L - Z

 


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