Small hourly beep charm

I want to make a very small charm that will play a short beep sequence alarm every hour. It does not need a stop button for the alarm, just beep a few times then be silent for another hour. I'm thinking attiny, speaker, battery. Or something along those lines. Or is this simpler with a 555 (I've never used one before)? I have used attiny for lights, but never anything with sound. Can anybody point me in the right direction for code and also a good place to buy tiny inexpensive speakers? Thanks so much!

Asked by aliasjanedoe 2 days ago

PDF Down load

Hi I am a premium subscriber joined January 2nd 2018. When I want download a pdf I get sent to the subscibe page and to subscribe again I already have a two year premium subscription. Cant find a page to help with this . Thank you BruceP54!

Asked by BruceP54 2 days ago

Tim's Cybot conversion to Arduino NANO

Hi all.I'm doing a new project.Dug out my Cybot. The one built on a fortnightly issue of Real Robots back in 2001.I decided to convert it to use the Arduino NANO. With Bluetooth and Infrared Control.I haven't finished it yet, so I haven't done an instruction here, I thought I would wait until I have finished the project before doing that.However, as it's quite a lengthy project, I have started a blog on my google+. Which I am updating as I progress with the project.Here is the link: Tim's Cybot conversion to Arduino NANO Blog.Before I started I had a search on the net to see if anyone else had done this, but all I found was basic stuff controlling the drive motors.Currently I have done a rough sketch (some fine tuning still needs to be done) for it that lets you:Control it via bluetooth,Set it in line follow mode,Set it in light follow mode,Set it in avoidance modeandControl it with an Infrared Remote.I'm sure there is still a lot of these Cybots out there, so i thought their may be some interest.

Posted by Palingenesis 2 days ago

Project made finalist on NatGeo, need your vote!

Hey guys,One of my project had made it to finalist on National Geographic, I would need your vote to make it further!Please spend a minute or two to cast your vote on NatGeo's website!,Peter

Posted by PeterM33 3 days ago

HP monitor going to sleep

So I am trying to help my grandparents fix there computer, they have a dell pc ( don’t know what exactly ) and a hp 22cwa monitor. The monitor will stay on in tell I plug the hdmi in then it says no signal then goes to sleep mode, I have tried new mouse and keyboard on the computer, as well as using another cord on this monitor and pc but neither work. I did take the monitor to my pc and used the same cords and it instantly worked with both cords just fine. Before today this monitor has been working for almost 6 months with no problem and now is randomly doing thos

Posted by alexberger1033 3 days ago