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Backyard Amusement
Приєднався 12 жов 2007
Dedicated to bringing you the most complete compendium of spare part usage and unusual experimentation on the web.
Join us on Facebook.com/backyardamusement
Join us on Facebook.com/backyardamusement
Attiny85 Stereo Class D Amplifier
This is a project that I revisited for the Hackaday under 1k challenge.
The goal of this project is to create an 8-bit 32khz stereo class d amplifier controlled by an Attiny85. I built a similar model back in 2014 based off the ATtiny461. This new version will be ported to the more popular ATtiny85.
I changed the scope of this project due to time constraints. My original intent was to have the class d output 0% pwm at rest, but it will now output 50% pwm at rest. Perhaps I will revisit this project in the future to address.
The code and build details can be found at hackaday.io/project/19178-tinyd-8-bit-stereo-class-d-amp-from-attiny85
The goal of this project is to create an 8-bit 32khz stereo class d amplifier controlled by an Attiny85. I built a similar model back in 2014 based off the ATtiny461. This new version will be ported to the more popular ATtiny85.
I changed the scope of this project due to time constraints. My original intent was to have the class d output 0% pwm at rest, but it will now output 50% pwm at rest. Perhaps I will revisit this project in the future to address.
The code and build details can be found at hackaday.io/project/19178-tinyd-8-bit-stereo-class-d-amp-from-attiny85
Переглядів: 8 439
Відео
Timelapse: Nixie Clock build in under 5 min
Переглядів 2,5 тис.8 років тому
13.5 hours of a design/build Nixie Clock time lapsed to under 5 minutes. Enjoy! "Barbarian" by Pierlo is licensed under CC Attribution Author: Pierlo freemusicarchive.org/music/Pierlo/ Source: freemusicarchive.org/music/Pierlo/Olivetti_Prodest/10_Barbarian
Photoflash: Xenon Vs LED - Part 3
Переглядів 4,9 тис.8 років тому
This is a comparison between a xenon flash and an LED flash. Visit us and like on Facebook @ backyardamusement/
Photoflash: Xenon Vs LED - Part 2
Переглядів 6248 років тому
This is a quick comparison between a Yongnuo YN560-III and a 100W LED. Look out for part 3 where I have a secret device I will unveil! Visit us and like on Facebook @ backyardamusement/
Photoflash: Xenon Vs LED - Part 1
Переглядів 1,4 тис.8 років тому
This is a quick comparison between a Yongnuo YN560-III and a 10W LED. Look out for part 2 where I'll be testing with a 100W LED, and part 3 where I have a secret device I will unveil. Visit us and like on Facebook @ backyardamusement/
LED Current Vs Luminance: Part 2 - 10W LED
Переглядів 5118 років тому
Testing a 10W LED with 10 microsecond current pulses from 30 to 200 volts and observing the brightness via a photodiode and an oscilloscope. Visit and like us on Facebook @ backyardamusement/
Measuring Camera Flash Durations
Переглядів 1,1 тис.8 років тому
This is an ongoing video series where I look at using LEDs for photography flashes in high speed applications. This is the second video where I measure the durations of the flash units. The first was deleted because I was incorrectly measuring and receiving inaccurate results. Visit us on Facebook @ / backyardamusement/
LED Current Vs Luminance: Part 1 - 5mm LED
Переглядів 1,4 тис.8 років тому
This is part 1 in a 2 part video series detailing my own experimentation on the brightness of an LED given different amounts of voltage/current. This is part of an ongoing video series that is to explore the feasibility of using LEDs for photo flashes. Visit us on Facebook @ BackyardAmusement/ Music: Sweetest Things by Chan Redfiled chanredfield.com/
Photodiode vs Phototransistor vs Photoresistor
Переглядів 76 тис.8 років тому
A quick comparison of the response times from the above mentioned devices.
Fallout 4 inspired bluetooth radio
Переглядів 1,6 тис.8 років тому
Modern bluetooth radio built with Fallout 4 inspired graphics and theme. The entire build and parts list can be found at www.georgegardner.info/electronics/fallout-4-inspired-radio-build.html Like us on Facebook @ BackyardAmusement/ Yes, I do understand that it's not really a radio since it can't "tune" into any frequency. Music Credits: Aftermath - Madness Paranoia by Kevin MacLeo...
Russian Nixie Tube Clock
Переглядів 2,1 тис.9 років тому
This is the 3rd nixie clock I've built. It uses an Atmel Attiny461 that keeps track of time via a DS1307 using a 32.768kHz crystal and communicating through I2C. The HV is generated using a boost converter circuit driven by the AtTiny that receives feedback through a voltage divider. There are 2 channels of LEDs (blue and pink) that turn on every couple minutes. They are controlled by a timer a...
Candle flicker from 3W RGB LEDs
Переглядів 9859 років тому
Happy Halloween. Showcasing a 2 x 3W LED board driven by ATtiny461A. The unit runs off of 10-15volts. There is a LM317 that regulates the voltage down to about 9.2 volts. This allows for me to use lower wattage LED resistors, since they do not need to drop as many volts. Before you criticize, realize that this unit was not built for the intent of just using it for a candle flicker, as I would h...
Nixie Tube Thermometer
Переглядів 1,2 тис.9 років тому
A showcase of a nixie tube thermometer that I designed and built. A full detailed build and schematic can be found at www.georgegardner.info/arduino/a-nixie-thermometer-build.html "Danse Macabre" Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 creativecommons.org/licenses/by/3.0/
Class D amplifier from Attiny AVR and Motor H-Bridge
Переглядів 16 тис.9 років тому
This is a Class D amplifier I build using an ATtiny461A and a cheap eBay motor driver a few discreet parts. See www.georgegardner.info/electronics/class-d-avr.html for details. The 461 uses the 10 bit ADC input to set the pulse width of timer1, which counts to 1023 in fast PWM mode (OCR1A = ADC). The motor driver is full bridge, so the output, OC1A,on the 461 is complimentary with /OC1A. The L2...
Simple IR remote trigger using 555 timer
Переглядів 18 тис.10 років тому
Simple IR remote trigger using 555 timer
Fire alarms hacked to play mario brothers theme
Переглядів 101 тис.10 років тому
Fire alarms hacked to play mario brothers theme
Backyard Home Theater DIY from spare parts
Переглядів 2,4 тис.11 років тому
Backyard Home Theater DIY from spare parts
Transmission line speaker box design tips
Переглядів 113 тис.11 років тому
Transmission line speaker box design tips
Transmission line speaker box math made easy
Переглядів 118 тис.11 років тому
Transmission line speaker box math made easy
The LED lights in your home could be spying on you!
Переглядів 870 тис.11 років тому
The LED lights in your home could be spying on you!
Discharging a bank of 20 supercapacitors
Переглядів 50 тис.11 років тому
Discharging a bank of 20 supercapacitors
even 13 years later this is still so helpful
Imagine this going off during the final exam! Every fire drill is personalized!
Horrible video. You didn't explain anything. This helps absolutely no one
thank you
Thanks for this one!
Would it be possible to build tline for 3 8s
MI PREGUNTA LAS TABLAS O MADERA DEL PORT OCUPAN ESPACIO ADENTRO USTED NO LE DESCONTÓ ESO AL LITRAJE NI TAMPOCO LA PARTE TRASERA DEL ALTAVOZ
Use a DC welder works fine they're made for dead shorts
Hi, this is a very interesting video! It helped me grasp the differences. Do you perchance remember which phototransistor you were using for this?
This shit help thanks
Wins the award for simplest breadboard demo.
this video was 13 years ago damn
Life saver! Thank you for this so sick!!!
That's Sound Of My Super Mario Ice Cream Truck
THANK YOU !!! had no idea the measurements have been available, and with them and your additional tips (re SQUARE file and caliper) hours of work and frustration shrunk into minutes :)
The slope of the lines is so close, it reveals high sensitivity. If you sneeze while cutting the last piece, the TL tune is off. LOL.
Nintendo release a game alarm
How did you do that
Humans can perceiver far more than 12hz. More like 1000hz
Thought we were gonna get a meth lab tutorial 😂😂😂
POV: when a kid hack the fire alarm system and listen to Mario theme.😂😂😂
Great video
Small, but powerful amplifier 😊💪
This is EXCELLENT - nobody else has shown how to use a dial caliper as you have to make a key. Should have "zeroed" it first, but it was "close enough for government work" - after all, you made a working key! Many thanks.
Loved the Ric Flair at the end 🤣
Research the patton numbers on the microchips inside these bulbs.
fucking brilliant, thanks for this
so they really can put thoughts in your head
How would you be able to find this device?
This is Very Incredible!
Ah, I used to watch this video.
Thanks for the cool tip! The chain whip from my toolkit was designed for 7-12 sprockets so the chain was too narrow for my fixed cog. This saved me having to buy another whip specially for fixie cogs!
Can also be used as a tool for optogenetics and kinda indoctrination? Training your brain in certain frequencies?
Worked right away, leverage is real. Thank you, you rock sir, even 12 years later, still a perfecto!
Hey I got a request try to play the imperial March from Star Wars on to those fire alarms
I can also hear the sound of the light sounding a little like a train on railroad tracks!
Yeah I got a bm old school 90s .just thought I'd watch the video
I used a ceramic person insulator or the electric fence porcelain insulators for my horizontal wire which was a 12 gauge indoor electrical wire and my copper grounding wire was same type wire that went to a copper rebar in the ground. Only disadvantage was that the antenna is only a directional antenna and the positive was I was able to talk nearly 50 miles away.
Which one is better for long distance? 🙏🏻
It would've been fucking hilarious if fire alarms at movie theaters showing The Super Mario Bros. Movie had these going off!
Is 250ma ok for a diode left on long term, not just for a second or would it be too high.
Spot on. Removed my cog in 30 seconds, Thanks!
POV: the fire alarms went off and this is what you hear:
Thank you so much! Another tool I needed to use once but I didn’t need to buy. My chain whip only fit the thinner cogs but not the wider one that was on my bike, perfect.
After my second Garmin Edge 520 died unexpectedly I decided to try something different - the Wahoo ELEMNT Bolt instead of the Garmin 530. Boy! I'm glad I did. ua-cam.com/users/postUgkxXZCtB-wGdHVTBSz8RswePK5vllHNi06N The display on the Wahoo Bolt is much easier to read. I like the configuration of the display more (up to 7 items visible on page 1 without scrolling and the first item chosen is larger characters than the next 3 rows that have pairs of items (still very readable). I also like the configurable item selections. The Bolt synced with my Garmin ANT+ Speed sensors on both bikes easily so no additional investment was required there. While the rated battery life is a couple hours less than the Garmin 520/530, I easily get a weeks worth of 1+ hour rides before recharging (and it's never really low on charge). At the end of a ride syncing to the Wahoo app, Strava, and Apple Health app is painless.
Was finally able to get a cog that had driving me insane for years.
Good idea if your existing probes are broken, but wouldn’t call this a hack. I think a better idea would be just to add male, female butt connectors to change the ends, to whatever you need alligator clips, probes, 10 foot extension, etc.
There must be a good reason why they are pushing LED lighting so hard
Life saver! I can’t believe this worked first try.
But l want to use a 12 inch woofer. Can l use it ? Will it reverse phase?