A motley collection of ideas
This circuit is a simple flasher that produces strong and short flashes. If you already know how a transistor works, you’ll have no trouble understanding how this thing operates. You can find the circuit on Tinkercad here: 👉 https://www.tinkercad.com/things/jn4ZX0OA4qi-flashing-light Although it works in a very simple way, this circuit actually exceeds the capabilities of Tinkercad’s … Read more
A popular variant of the well-known NE555 timer IC is the NE556, which contains two timers. With this IC, you can build a simple siren. This siren alternates between two tones, similar to old police car sirens, while also flashing a blue and a red LED. You can test the circuit in Tinkercad: 👉 https://www.tinkercad.com/things/lsxjw2LzvA7-police-siren … Read more
This is a simple sound generator that can be controlled by light or by your fingertip. If you illuminate the photoresistor with a lamp or cover it with your hand, the pitch of the sound changes. You can try it out in Tinkercad: https://www.tinkercad.com/things/aEJgBAQp91s-fingertip-organ Instead of the photoresistor, you can place two bare wires that … Read more