View allAll Photos Tagged opamp
All integrated circuits, but with very different functions.
PIC16LF877A is a 8-bit microcontroller
MCP6295 is an operational amplifier (OpAmp)
DS1820 is a digital thermometer
BA4558N is another OpAmp
D2634C is a 65,536 bit(!) Read Only Memory, dating back to the early 1980's
For Macro Mondays
Theme: Five
A quad (four-section) operational amplifier surrounded by a cluster of resistors and subjected to a dose of solarization.
This is a CMOY-design headphone amp, encased in a solid (butcher) block of red oak, which I built in 2003. I love the way it looks as much as the way it sounds.
Built around a Burr-Brown 2132 opamp, it has hand-matched (.1%) resistors and Panasonic caps.
It has great dynamic range, clarity and noise floor. Not to mention a very high WAF.
:)
If you are interested in building your own audio gear, here is the center of the universe:
New pre-amp with tone control. Two ultra low noise dual opamp NE5532 are used from T.I. ; Tone defeat switch too. I am going to use it with a toroidal 2x12V transformer.
Back to this arrangement - still look the best
2016 Simplified 4-ways Active System
1. Mac Mini mid 2011 running ChannelD Pure Music 3 as player and crossover control software
2. TC Electronic Studio Konnekt 48 which all output opamp have been replaced running as preamp, 4-way active crossover via Firewire 1394 protocol.
3. 845SE mono block amplifier driving JBL2235H for 20Hz-80Hz
4. 2A3SE amplifier driving Altec 414B for 80Hz-768Hz
5. 345SE amplifier driving Altec 288D + Altec 511E horn for 768Hz-8kHz
6. CV4055 PP amplifier driving Fostex T925 horn tweeter for 8kHz-20kHz
Installed a gold plated DIP8 socket for Op Amp rolling and trying out MUSES02 Op Amp that replaced the stock Burr Brown OPA2134PA. Flanked by a pair of Nichicon FG capacitors.
MUSES02 is a high quality bipolar input dual audio Operational Amplifier for premium and professional audio equipment.
I prefer the sound character of MUSES02 over Burr Brown OPA2134PA.
Back to this arrangement - still look the best
2016 Simplified 4-ways Active System
1. Mac Mini mid 2011 running ChannelD Pure Music 3 as player and crossover control software
2. TC Electronic Studio Konnekt 48 which all output opamp have been replaced running as preamp, 4-way active crossover via Firewire 1394 protocol.
3. 845SE mono block amplifier driving JBL2235H for 20Hz-80Hz
4. 2A3SE amplifier driving Altec 414B for 80Hz-768Hz
5. 345SE amplifier driving Altec 288D + Altec 511E horn for 768Hz-8kHz
6. CV4055 PP amplifier driving Fostex T925 horn tweeter for 8kHz-20kHz
Light Sensor Experiments.
First try out measuring leaf-shutter speed with a simple USB Oscilloscope.
Hmmm.... that Vario shutter seems quite lame !
Guess I also have to go for another light source then that cheap LED-Torch as the switching of its LED introduces quite some "noise" on the signal.
This is a treat. Una joyita. Si te quieres fabricar uno puedes seguir estos dos enlaces
Si lo quieres comprar aprovechando que el dolar está por los suelos puedes probar aquí.
This is an MC33174D Quad OPAMP. It contains four amplifiers (which I have anotated) stacked vertically from the top of the image to the bottom.
The Motorola logo is visible on the right side as well as some other markings, including "34174" which sounds simmilar to the "33174" which was marked on the plastic of this chip.
I am currently enrolled in some summer courses for university and have been very busy and unable to upload at my regular pace. I have several CPU's in the mail which I plan to take apart in the coming weeks and months. One chip I hope I won't be taking apart is a Ryzen 3700X which has 2 bent pins which I plan to replace my Ryzen 1700 with, assuming I can fix the pins, which appears likely. This will speed up the render times a fair bit (since the hardest parts of stitching are single threaded) and the 3700X's single threaded performance blows the 1700's out of the water.
Camera: SONY A6000
Number of Images: 36
Panorama Y Axis: 9 Images
Panorama X Axis: 4 Images
ISO: 100
Shutter Speed: 1/15"
Light Source: LED in Eyepiece
Overlap: 50%
Microscope Objective: 10X
Microscope Eyepiece: DSLR Mount
Grid Used: 4x4 (Panning Movement Aid)
Capture Motion: Serpentine
Stitching Software: Autopano Giga
Other Software: GIMP for white balancing
Image Type: JPG
Image Quality: 98%
This is an MC33174D Quad OPAMP. It contains four amplifiers (which I have anotated) stacked vertically from the top of the image to the bottom.
The Motorola logo is visible on the right side as well as some other markings, including "34174" which sounds simmilar to the "33174" which was marked on the plastic of this chip.
I am currently enrolled in some summer courses for university and have been very busy and unable to upload at my regular pace. I have several CPU's in the mail which I plan to take apart in the coming weeks and months. One chip I hope I won't be taking apart is a Ryzen 3700X which has 2 bent pins which I plan to replace my Ryzen 1700 with, assuming I can fix the pins, which appears likely. This will speed up the render times a fair bit (since the hardest parts of stitching are single threaded) and the 3700X's single threaded performance blows the 1700's out of the water.
Camera: SONY A6000
Number of Images: 36
Panorama Y Axis: 9 Images
Panorama X Axis: 4 Images
ISO: 100
Shutter Speed: 1.3"
Light Source: Ring Light
Overlap: 50%
Microscope Objective: 10X
Microscope Eyepiece: DSLR Mount
Grid Used: 4x4 (Panning Movement Aid)
Capture Motion: Serpentine
Stitching Software: Microsoft ICE
Image Type: JPG
Image Quality: 100%
Light Sensor Experiments.
So having a BPW21 photodiode lying around for quite a while i decided it was time for some experiments to get to know it a bit better.
The BPW21 is choosen because it was specificly designed to be sensitive for light in the human visible spectrum. As most films for our classic cameras are designed for that same spectrum this seems to be a good choice.
A quick search gave a nice article from Dr.Taiga (a pseudonym) about a set-up with an Op-Amp (operational amplifier) and a photodiode. You can find that here : Doctor Taiga Article
.
So i bought the components, breadboard and some jumpers for an experimental set-up.
Power supply in my case is a accupack from 4 NimH cells which also gives about 5 Volts like in Dr.Taiga's article.
Because the Op-Amp is set up as a regular amplifier there is a nice analog value coming from it's output which should be more or less linear with the amount of light picked up by the Photodiode.
In this set-up, exposed by 2 daylight lamps from the side, the output is a nice 0,195 Volt.
So, with a Photodiode set-up like this it should be possible to get indications about both shutterspeed as well as light strength.
This was my test unit. I made quite the mess out of it, but the final version sounded good. I put about $300 in mods, including Auricaps, Solens, Burson Discrete opamp, Blackates, Nichicon FG ect....
Here is the stock underside of the TOTL CDP-X77ES cd player. Sony's flagship for 1990. Within the copper plated chassis, you can get a glimpse of the famous diecast transport (black square middle) with the KSS280A laser block, which was specific to this model. This transport also uses magnetic linear skate tracking (no gears) to move the laser along. High quality parts are used including Analog Devices opamps for low pass filter and non polar film caps for audio coupling and bypassing.
My second attempt at building a cMoy based on the 4556 opamp. The first one had a DC offset of ~13mv on one side which seemed like too much. I couldn't find the problem, so I built the circuit again with a better layout and a couple small changes, and this time I've got DC offsets <= 5mv on either side which is much more acceptable. Now I need to case it up, when I get that figured out. I also messed up the first attempt at building a case.
Obviously, this circuit shares some similarities to the Grado RA-1, but it's not intended as an RA-1 clone. The layout is based on Tangent's cMoy layout, and while a few parts are similar to those used in the RA-1, it does have some differences as well. The goal was strictly to build a cMoy suitable for low-impedance headphones.
Dynavox TPR-3 (pre-amp) and ET-100 (end-amp 2x30W 8 Ohm) in a combination of Philips MFB (active speakers 2x60W complete refurbished) and wideband Visaton (Solo 9) speakers (2x20/40Watt 8 Ohm). Spotify via the Samsung Smart TV Toslink Audio out to Dynavox Toslink/Coax- RCA Audio out (digital) convertor to the TPR-3 vacuüm tube pre-amp.
Modifications: New G.E. 5670W JAN Triode tubes with militairy specs. Exchanged opamps in the first stage RIAA NE5534 to LT1028 extreme ultra low noise. Elco's 2x 4700uF/50V changed to 2x 10.000uF/50V in the ET-100. Connectors: All Neutrik RCA Gold plated.
Works ok. The exponential voltage tracking is rather bad, even at constant temps. However, I was really happy with how that stop-mask response plot came out, even if it is woefully inaccurate.
Also, the ceramic caps in the signal path (2x 100pF) are a BAD IDEA -- they sound like shit, frankly. Can't say I'm surprised, really. I only used ceramics because I forgot to buy proper 100pF film caps. The next build of this board I'll be using Poly-film caps, prolly WIMAs.
My recently completed phono stage. I Have since finalized the wiring since this photo was taken, but this one gives you an idea of what it looks like inside. It has adjustable loading via dip switches inside and I can also swap opamps to see which provide the best sound.
Burr-Brown Research Corporation introduced the first solid state modular op amp in 1962. It was a circuit board based device with discrete transistors, resistors, capacitors etc in a fully tested potted module. The 1510 example potted module op amp in the image is date coded 1971.
Fairchild Semiconductor had introduced monolithic bipolar op amps in the 1960s but they were low performance. There was no ability to trim parameters on-chip, but within the Burr-Brown modules it was possible.
It wasn't until the likes of Burr-Brown and Precision Monolithics developed on-chip thin film laser trimming that precision analog ICs were introduced.
The Burr-Brown OPA134 op amp on top for size comparison is from 1996.
Deze tekening geeft de max snelheid van de dremmel (12000 tr/min) 2 strips per omwenteling met een breedte van 5mm. Voorgaande tekeningen waren niet op het max toerental. Dit is 200 us voor een verplaatsing van 5mm. Gezien ik om de 40 us scan met de IR laser heb is tot 5 resultaten in het signaal. In de praktijk zouden enkel de 2 eerste pulsjes nodig zijn want direct daarna zou ik de scan stoppen en de camera sturen. De lens staat hier op F5.6. Omdat er in de praktijk zo weinig pulsen nodig zijn mag de referentie spanning veel lager ingesteld worden dan de halve opamp level. Het systeem heeft nooit de tijd om hem volledig naar beneden te regelen zonder dat ik detectie gezien heb. Hierdoor kan ik nog beter het bijna volle bereik van de opamp gebruiken voor de adc.
Is er omgevingslicht dan wordt die traag geregeld. het is praktisch niet mogelijk om omgevingslicht super snel te laten veranderen. Ik moet later het geheel nog testen met echt omgevingslicht maar ik vermoed dat dit toch een vrij goede instelling zal zijn. Mocht het toch nodig zijn een onderscheid te maken tussen dag en nacht opnames dan is er nog een mogelijkheid om het referentie level via een kleine fet in te stellen. Dit zou gewoon een tweede niveau kunnen zijn. Gewoon kwestie van het te voorzien in het ontwerp en een functie op de bediening.
Nog even over deze snelheid. 200 us en 5mm beweging komt overeen met 25m/sec of 90km/uur. Onvoorstelbaar hard! Ik krijg dus 5 detectie pulsen van een vrij zwart oppervlakte van 5x5mm die aan 90km/uur voorbijkomt op 380mm van mijn camera lens. Dat noem ik gewoon snel!
Dat er nu nog één zweefvlieg durft te passeren die ik niet kan detecteren...
The entire test bed, consisting of:
G&W T-2.6F amp with Mullard E88CC tubes
Zhaolu D2.5 DAC with integrated amp and LM4562 opamps
Musical Fidelity V-DAC
Beyerdynamic DT880 '03 edition
Beyerdynamic DT880 '05 edition
Breadboard circuit for Sound Flash Trigger With Delay (Mk I)
My long absence from Flickr has been due to me devoting a lot of my spare time to re-learning electronics and learning how to develop software for microcontrollers.
This prototype circuit was my first attempt to build a sound trigger for my Canon Speedlites -- as I had modified my OC-E2 flash extension cable I was able connect directly to any of my Speedlites.
Unfortunately, I discovered that the timing ICs I was hoping to use (NE555) are just too slow to respond to the sound of a balloon popping. The shortest delay I could get out of them was roughly 2ms which just wasn't fast enough.
So my next move was to use microcontrollers, initial the PIC 16F628A, but I migrated to the AVR ATmega8. The AVR has an open source GCC development environment and the AVR are available here in Portland (Surplus Gizmos on Cornelius Pass just off of Hwy 26).
The circuit has five stages:
1) The audio amplifier using a LM386 OpAmp IC
2) A comparator to convert the amplified audio into a distinct pulse to trigger the timer delay circuit
3) The first timer (NE555 IC) which is the delay part
4) The second timer (NE555 IC) which generates the trigger pulse for the Speedlite
5) The opto-isolator (MOC3020 IC) which triggers the Speedlite, but protects both this circuit and the Speedlite. With this setup I could use an older hot-shoe flash which are notorious for running 300V between the hot-shoe pins.
Like I said, unfortunately this prototype was just too slow, but I learned a lot in the process.
Side-note: Canon Speedlites can't be triggered repeatedly with just an opto-isolater by itself. Due to some quirk in their design you have to add resistor and capacitor in parallel (to each other) to help reset the Speedlite after it is triggered. I used a 1M ohm resistor with a 0.05uF capacitor rated for 600V.
It features the highly regarded Cirrus Logic CS4398 DAC chip—along with WIMA, EPCOS, and Nichicon FW capacitors and the OPA2134 high-fidelity opamp—and supports DSD64, DSD128, and PCM formats up to 24 bit/192 kHz. The circuit has been specially designed to eliminate pop noise, and the laser-engraved aluminum shell is sleek, sturdy, and compact. Plus, it’s as user-friendly as they come, its front panel fitted with two LED indicators and two switches: one for on/off and the other to switch between optical, coaxial, and USB.
Build a buffer blog entry.
Opamp, battery cables and signal connections added. The opamp was accidentally reversed in this photo. The dot on the opamp’s case should point upwards.
Some chips, with icing labels and pins added, to show relative sizes. The little guys are charleston chew based quad op-amps (TL074), then ATtiny2313s based on a "fudge stick" (left) and a Kit Kat (right). In the back, three 555s sit (at a slightly larger scale), made from chocolate-covered graham crackers.
Part of the circuitry snacks project: Edible models of functioning electronic circuits. Designed for fun, for geeks, for kids, and for teaching and learning electronics.
www.youtube.com/watch?v=CbuIDk6IfMk
IR photo sensor+opamp+ very small midi controller
detect a heartbeat, and MIDI send
LM4562HA Dual OpAmp (Metal Can, TO99-8) by National Semiconductors. Country origin: USA. Available in same batch number: A88ABE1.
Go to IC OpAmp
Go to main menu (all categories).
Contact me: Alex.
www.youtube.com/watch?v=CbuIDk6IfMk
IR photo sensor+opamp+ very small midi controller
detect a heartbeat, and MIDI send
Light Sensor Experiments.
Second try out measuring leaf-shutter speed with a simple USB Oscilloscope and a simplified electronic circuit.
Now with a Gauthier 693 shutter set at 1/300
The "noise" seen in an earlier setup magically disappeared so the source of that wasn't the light source after all but probably the OpAmp part of the circuit, now no longer used.
Burr-Brown BB OPA2604AP (DIP) Dual OpAmp.
Go to IC OpAmp
Go to main menu (all categories).
Contact me: Alex.
New OPAMP Phono section (IC101), LM4562. The old one was UPC4570C. New OPAMP there is also a section of the output signal pre (Line Out, Front Speakers, IC803) - olso the LM4562. The old was NJM4580D-D. And as the game now? With more energy and a better bottom diameter, a lot of details, in other words, it is BETTER!
The next module from Fonitronik will be the mh31 VC Modulator. It is a voltage-controlled, OpAmp-based ring mod with a dedicated VCA for each channel. Each channel (carrier & modulator) has the following parameters: main input, initial volume knob and CV input with attenuator.
LINK for more info: muffwiggler.com/forum/viewtopic.php?t=18238 .
Fonitronik in general:
A close up of the analogue processing section of M2FC, Martlet 2's flight computer. You can see the instrumentation amplifiers (at the bottom) for the strain gauges, each followed by a dual opamp implementing a four pole Sallen-Key filter. On the top are the thermocouple amplifiers (with built in cold junction compensation) and the same filter opamps.
The flight computer features three K-type thermocouple inputs, three strain gauge half-bridge inputs, three 1A pyrotechnic outputs, a full IMU (±20g and ±200g 3axis accelerometers, 3axis gyro and magno, barometric pressure), a micro SD card for datalogging and a serial interface to the radio and other peripherals. It's powered by an STM32F405VGT7 32-bit ARM microcontroller.
Fore more details on the schematics, see: www.cusf.co.uk/2014/07/martlet-2-electronics-schematics/
The PCBs were sponsored by Cambridge Circuit company, thank you!
This is a very simple digital sound sensor (Arduino Sound Sensor Module for Sensor Shield, SKU 74446) from Goodluckbuy. It’s either triggered because there’s a sound loud enough or not. The sound level threshold can be set by adjusting the pot on the PCB and the red surface mounted LED can visually show you when the device is being triggered. Much like the light sensor an op-amp is used (LM393).
The only down side is I would have liked the choice of either a digital or an analogue value much like the light sensor and it’s switch.
Here is the guts of the VU meters. There are two power supplys in the box, one is a + - 12v supply for the opamps to drive the LED's and there is also a switchmode nixie power supply which outputs about 170V!
The unbalanced audio signal is fed into the buffer kit, which then goes into the nixie driver kit and outputs them to the IN-13's. A split of the audio signal is also fed into the LED driver circuit.
For info on the nixie power supply kit:
www.ledsales.com.au/catalog/index.php?main_page=product_i...
For info on the IN-13 driver kit:
www.ledsales.com.au/pdf/in13_driver.pdf
For info on the VU buffer kit:
www.jlmaudio.com/shop/index.php?_a=viewProd&productId=19
For info on the + - 12V kit:
Back to this arrangement - still look the best (sorry for the dirty carpet)
2016 Simplified 4-ways Active System
1. Mac Mini mid 2011 running ChannelD Pure Music 3 as player and crossover control software
2. TC Electronic Studio Konnekt 48 which all output opamp have been replaced running as preamp, 4-way active crossover via Firewire 1394 protocol.
3. 845SE mono block amplifier driving JBL2235H for 20Hz-80Hz
4. 2A3SE amplifier driving Altec 414B for 80Hz-768Hz
5. 345SE amplifier driving Altec 288D + Altec 511E horn for 768Hz-8kHz
6. CV4055 PP amplifier driving Fostex T925 horn tweeter for 8kHz-20kHz