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For the circuits on the bread board I used Microchip MCP2021 AND MCP2022 op-amps to perform functions described below. These can run on 5V single rail supply making it easy to power from the computer.
Pre-amplifier. This is to allow a range of different signal sources to be connected to the input. An adjustable gain control is used to ensure the signal will be amplified as loud as possible.
The output from the pre-amp goes into an anti aliasing filter. This is a third order butterworth low pass filter with a cut off frequency of 20KHz that removes any higher frequencies that may cause aliasing distortion during the process of analogue to digital conversion. The sampling frequency will be at least 40KHz for most audio purposes but can be made higher or lower in software depending on the signal I want to capture.
The output from the DAC is sent to a reconstruction filter to remove unwanted high frequencies caused by the conversion process. This filter is the same 20KHz low pass filter as used above. With the combination of these two circuits and some software I have the ability to sample sounds and play them back and use the computer as a musical instrument.
The switches along the bottom edge of the bread board allow me to change the signal path. I have options to bypass the filters and other circuits and connect the ADC or DAC direct to the input/output connectors. This is useful if I want to use a different set of filters externally or for measuring DC voltages from something like a temperature sensor.
Other switches allow me to send the output from the DAC to another op-amp used as a mixer and mix that with another signal source coming from a second input.. The output from the mixer can be sent back to the ADC and re-sampled. An additional low pass filter can be switched into the feedback path between mixer output and the ADC input. This can be used to turn the whole setup into an audio delay effect with some additional software.
Iv'e still got a little bit more work to go before I can finally build this on to the last piece of Veroboard. Some more wires need to be added to connect up the filter circuit on the right hand side of the breadboard. A few component values in various parts will be altered to adjust the overall frequency response. Ideally so that it is flat across the audio frequency range.
*** UPDATE - 09/01/2020 ***
Iv'e been having a think and i'm not finished yet...
So I decided to add an ADSR envelope generator to the circuit which controls a VCA and have that switched in after the DAC's low pass filter and then into the mixer. I have a spare bit not being used on one of the 74F573 registers which can provide the trigger source for the envelope generator.
Head over to @theneighborhoodvet 1101 Broadway! Today and Tomorrow 10 am to 4 PM! #packedweekend celebration and $10 rabies and $25 microchips! Both dogs and cats! (And ferrets if you’ve got one!) Hoping for a good turn out to help lots of people! #amazonprime #thepackonprime #dogsofinsta #catsofinstagram #dogs #cats #checkitout #discount #swag #bushwick #brooklyn #share #spreadtheword #vetcare instagr.am/p/CH2-gTvFswW/
Microchips, transistors... digitalized life.
Reverse macro taken mounting my Nikkor 50mm 1.8 on my Nikkor 55-200. Reverse macro is quite fun :)
Think they still do micro chips don’t they, well depending on your pov, these microchips are slightly less tasty.
Macro Monday theme: unusual combinations.
Focus stacked .
When we got to the hospital, we scanned her for a microchip right away, and sure enough she had a chip. We called the number, and found the owner who has been looking for her for almost 10 days. We learned that FRIDA got away when she got scared of the lawnmower. The gardener forgot to close the gate, and she just ran and ran, and couldn't find her way back home. She didn't have a collar, but her microchip really saved the day. When the owner came to pick her up she was so happy. We explained the importance of having a collar and a name tag, and they promised she will always have it on.
It is interesting how many dogs end up on the railroad tracks... I don't really understand why is this a spot dogs choose.
Here are 3 videos of dogs on the tracks... I am sure most of you missed at least one of them:
www.youtube.com/watch?v=z8wpfkCp1SM
album- bit.ly/35vANVn LOST orange/white dlh cat in #macewan. Has tattoo and microchip. 403-681-3297. very friendly. pls rt, watch, share to help get PABLEO home. LOST. Super friendly male cat, long hair, orange & white, altered, no collar but is chipped & has tattoo. His name is Pableo. Macewan area. Please contact 4036813297 if you have seen him!! 2020-05-03T20:53:29.000Z by Ayla original fb visitor post-click here bit.ly/3fbk1Q5 Original wall post: bit.ly/2xzOiXO May 04, 2020 at 01:30AM bit.ly/2BxTYim iftt Upload public photo from URL
Sandia has completed phase one of an anticipated three-year upgrade at its plant responsible for making integrated circuits, similar to computer chips. The facility is now fully compatible with industry-standard, 8-inch silicon wafers — thin, round starting materials used for making chips. Previously, Sandia used 6-inch wafers.
Supporting the new size will help sustain production of microsystems for national security applications through 2040. Prototyping and product development activities have already resumed.
“Moving to 8-inch wafers aligns us with industry, which means we have a more sustainable supply of starting materials, tools and service,” said Sandia senior manager Mike Holmes, who is overseeing the process.
Learn more at bit.ly/2nZNOpb.
Photo by Randy Montoya
Microchip's next-generation Bluetooth® Low Energy (LE) solutions are qualified to the latest Bluetooth 4.2 standard. The IS1870 and IS1871 Bluetooth LE RF ICs, along with the BM70 module, expand Microchip’s existing Bluetooth portfolio and carry both worldwide regulatory and Bluetooth Special Interest Group (SIG) certifications. These new offerings are ideal for Internet of Things and Bluetooth Beacon applications, and make it easy for designers to take advantage of the low power consumption and simplicity of Bluetooth LE connectivity. For more information on Microchip’s broad range of Bluetooth certified solutions, please visit: www.microchip.com/Bluetooth-102015a.
A silicon disc of HP41C ROM's from about 1980 with an early prototype HP18C key for scaling (note the key is whitish-brown, not the production grey)
I found this little "spy plane" at my work! Have a look on his back. Can you see the tiny microchip? I think he is sent from another hospital to check out our costs for some laboratory analyses.
NEW NEW! Now Remote Shooter 3.0 on igg.me/at/remshoot30/x/2778971.
It's a crowfunding campaign, help us to become it a reality!
Ready for the test the complete setup of the portable device "USB PTP/MTP camera controller prototype" we built to control a camera via USB for HDR bracketing, time lapses, etc.
Prototype based on PIC24F chip (www.microchip.com)
Main features:
1)Remote shutter release (momentary switch)
2)Time lapse (variable settings in secs/repeat)
3)IR/Motion detector for shot when an object is in the operative range
4)Sound trigger for shooting as a relevant sound is revealed.
5)Laser beam/Light trigger for shooting as a beam is broken by an object.
6)Shutter speed setting (up to 1/4000)
7)Bracketing control (HDR)
8) Work in progress
now the project becomes Remshoot 1.0
english version:
glptech.blogspot.it/2012/03/remote-shooter-10-usb-remote-...
Versione Italiana
it.emcelettronica.com/remote-shooter-10-sistema-di-contro...
Tested on:
Nikon Coolpix AW100
Nikon D50
Nikon D90
Nikon D7100
Canon Powershot A300
Canon Poweshot S500
Detail of EPROM Integrated Circuit
Nikon D800e mounted on microscope. (10x)
Surface illumination provided by two white LEDs.
Part of the new health care system to come will be to computerize all health care records. The "V-Chip" is a microChip which would be embedded in the arm of patients. Health care professionals would then scan the arm, and retrieve an ID number, allowing them to access personal information. 515 hospitals have agreed to take part in the VeriChip system. 100 hospitals are already trained and set up to use the VeriChip so far. This is just the first step. Combined with the National ID, (complete with rfid chips) Americans will be tracked, and controlled.
In Palm Beach, Florida 200 Alzheimer’s patients were already microchipped by the VeriChip company, for free.
The state of Oklahoma is debating a bill to microchip prisoners of violent crimes, to keep track of them after release. Chipping people is wrong. At the moment, it is a choice to be chipped; before too long it will be mandatory. This is a violation of privacy, as well as a threat to American freedom!
Do your research and say no to the VeriChip!
Rather irritating, no transcript, and I can only read, not listen. I mean, how can I listen to this when I am already listening to NPR? Do that thing with my brain where I decide which thing to listen to? I gave them a couple of days to post a transcript, but no.
At the end of it people said 95% would. 95% of whom? People who contacted him? www.bbc.co.uk/programmes/p02hqbtc
Microchip announced the first in a series of modules for the LoRa™ technology low-data-rate wireless networking standard, which enables Internet of Things (IoT) and Machine-to-Machine (M2M) wireless communication with a range of more than 10 miles (suburban), a battery life of greater than 10 years, and the ability to connect millions of wireless sensor nodes to LoRa technology gateways. The 434/868 MHz RN2483 is a European R&TTE Directive Assessed Radio Module, accelerating development time while reducing development costs. Additionally, it combines a small module form factor of 17.8x26.3x3 mm with 14 GPIOs, providing the flexibility to connect and control a large number of sensors and actuators while taking up very little space. To learn more about this new module, go to: www.microchip.com/LoRa-Module-030215a.