Great knock box for Halloween

Halloween is a day when weird and scary things are welcome. So Kyle had this idea to make a knock box which would respond to knocks. Circuit is pretty simple and straight forward – Attiny85 microcontroller detects knocks by using piezo sensor. To make it reliable, he amplified piezo sensor signal by using MOSFET. Knocking back part is made of DC motor with shaft attached. Knocking pattern is recorded by using microcontroller timer. There are several modes preprogrammed for instance if 13 knocks are detected, then it plays “Adams Family” song using same piezo sensor as speaker. If 20 knocks are detected then box knocks randomly for 30 seconds. Otherwise box simply knocks back same patterns. A special attention is paid to box look. Lego skeleton and chains look great on it. Continue reading

Tactile Metronome – The Fantastic Beat Looper!

If you’re enjoying with the grooving beats, but it’s impossible for you to bring the huge beat player with you, maybe this Tactile Metronome is the best option for you! For your information, the Tactile Metronome is a tap-controlled metronome and beat looper. Well, it’s pretty easy to use the device, as by tapping the piezo speaker, it’s ready to set the frequency. Normally, the display shows the beats per minute, while the two buttons allow you to adjust the speed you want! Oh, is it only my imagination or I really heard someone said, “Another boring stuff?” Ok, don’t judge a thing by its appearance so fast. Did you know that this Tactile Metronome has many interesting features, including: Easy to assemble kit Fully open-source design Piezoelectric speaker Seven-segment displays Professionally-made PCB and A Pre-programmed Microcontroller It’s as easy as ABC to assemble the Tactile Metronome. First of all, you have to prepare the equipments, such as a solder iron, solder and a pliers. Since all the soldering is through hole, it isn’t too difficult for you, even though… Continue reading