![Amazon.com: Playz Electric Piano Circuit Board for Kids - 38+ Music Lab Experiments, Kids' Electronics Kit, DIY Engineering Toy & Educational Science Kits, & STEM Projects for Kids Ages 8-12, Teens, Boys, Amazon.com: Playz Electric Piano Circuit Board for Kids - 38+ Music Lab Experiments, Kids' Electronics Kit, DIY Engineering Toy & Educational Science Kits, & STEM Projects for Kids Ages 8-12, Teens, Boys,](https://m.media-amazon.com/images/I/91M9aMcZ+BL._AC_UF894,1000_QL80_.jpg)
Amazon.com: Playz Electric Piano Circuit Board for Kids - 38+ Music Lab Experiments, Kids' Electronics Kit, DIY Engineering Toy & Educational Science Kits, & STEM Projects for Kids Ages 8-12, Teens, Boys,
![A simple electronic piano (organ) made with a 555 timer. Designed for Year 8 students at KS3 and introducing the astable 555 timer. - Design and Technology On The Web A simple electronic piano (organ) made with a 555 timer. Designed for Year 8 students at KS3 and introducing the astable 555 timer. - Design and Technology On The Web](http://www.design-technology.info/ks3/y8/img72.gif)
A simple electronic piano (organ) made with a 555 timer. Designed for Year 8 students at KS3 and introducing the astable 555 timer. - Design and Technology On The Web
![Please help me identify the processor used in this toy piano circuit, seems to have around 42 pins : r/AskElectronics Please help me identify the processor used in this toy piano circuit, seems to have around 42 pins : r/AskElectronics](https://preview.redd.it/sqn3ajh811b81.jpg?width=640&crop=smart&auto=webp&s=e8dee431de3a7c853cb50fbfe729f7f0528b47b5)