This was made by me when i was a kid, it was even published in a magazine, i think it will work, it was used on a very old huge ornamental valve philips stereo system in the remote speakers.
Recently i captured this circuit in eagle to publish online, it seems to have a small design error. It worked well for many years. The step-down transformer is used as a step-up here. The secondary winding was around 50mA so the resistance was protecting the 2N2222. (SL100 was used in the original one). C1 and R3 may need tweaking to get the desired adjustment range in R2.
The voltage across the speaker is fed to C1-Gnd, which blocks DC component. R1, R2, R3 form a threshold bias for T1. 2N2222 chops the 12V DC in tune with the music. The chopped DC current flowing in the 12V winding of TR1 is stepped up into AC pulses over 100V, this lights the Neon in flashes synchronizing in real-time with the beats. Known Issues – It does not perform well at low Bass like 20Hz.
The Source file in CadSoft EAGLE format is here del00005.zip
Wouter van Ooijen runs VOTI is an engineer who has worked on many software and systems projects. He has a Webshop with PIC Parts and Kits. His PIC FAQ and “blink a LED using one of these flash PICmicro controller” is great for beginners.
Van Ooijen Technische Informatica
A very slow 0.. 5 Volt fader
A circuit that generates a voltage that rises slowly from 0 to 10 Volt and (when a switch is flipped) slowly back to 0. The request did not pose much restriction on the wave form, but a rise / fall time of 30 minutes should be possible.
I got a mail question, which i logged here Long Duration Linear Sweep or Ramp Generator. The above project could be an neat answer.
A Geek How-To , Gadget and Arduino Community News site run by Oscar Gonzalez form A Coruña in Spain. From software programming, electronic projects and DIY Gadget Gizmo hacks.
BricoGeek.com – Gadgets Gizmos and Arduino
Arduino Nano is like the Arduino Mini, but smaller. Allows rapid prototyping on a breadboard.
Comes with chip version 3.0 ATMega328. ICSP connector for external programmer. USB mini-B connector for programming and serial communication. Integrated voltage regulator. Pins-spaced 0.1 “DIP for insertion directly on a breadboard
“I was goofing around the other day thinking of ways that I could use NFC with RoboBrrd. I got a few NFC tags and was also getting a robot achievement badge (thanks Adafruit!), so there had to be some way to connect these things..” – What a Hat can do
RoboBrrd from RobotGrrl.com!
This is an Interesting Life Form. The RoboBrrd reminds me of Ancient DictaBird from The Flintstones (1994) Movie.
I would prefer one that that may be useful on the Desktop like the DictaBird. That reminds me of another Bird called ‘SMS’ in Asterix and the Vikings. So an Interactive desktop communication helper in the form of a Extra-Smart bird. Like Daisy perhaps. Something Fuzzzy or with AI like
The Billy Project – DAISY
Daisy’s primary purpose is to be able to converse with humans.
“What separates Daisy from Billy (and most other chatbots) is that Daisy has no pre-programmed (or hard coded) language of any kind. She starts with no knowledge of anything, but then is able to gain knowledge as she observes what humans say. From this, she is able to remember patterns of words, and the probability of these patterns occurring. Using this data, Daisy is able to actually generate her own..”
See on the right is another green bird, it could have been inspired by the DictaBird. He is Peedy the Green Talking Parrot, he also happens to be an MS Agent.