Golfer toy with custom made Grove servo driver

Background

I'm developing STEAM education programs for kids and also grown-up hobbyists. This is one of elector-craft kit series now we are working on.

My goal is to make kids find it's fun to make something in their head into reality, and they feel comfortable using electronics just as any other tools like paper and scissors.

Aiming this goal, our kits are

• every craft materials are easy to handle, common to find - so they can reproduce easily, change design easily.
• no coding needed. - so the mechanism is very intuitive, easy to understand
• electronic modules are interchangeable across kits - basically most Grove modules using simple digital/analog signal are compatible.

Working sample

Circuit

In this project, the circuit is simple. The signal from the button goes to servo through the custom-Grove servo driver. Custom-Grove power module supplies power and connects other modules

Kit

Servo Driver

For this project and other electro-craft kits, I designed a servo driver with the help of "Seeed Grove Sensor Co-Design Campaign ( https://www.seeedstudio.com/blog/2022/07/15/ignite-your-passion-fire-your-thoughts-develop-your-grove-sensor-with-seeed-fusion-for-a-chance-to-win-over-300usd-cash-prize%EF%BF%BC/ )".

With this custom-made Grove module, we can control a servo with simple on-off or 0~5v analog signal. Attiny84 chip on the module generates PWM signal and put it out to servo according to input signal from Grove pin on the left side

Basically 0v signal drives the servo to 0˚, 5v to 180˚. But there is a trimmer on the servo driver in order to adjust servo's maximum and minimum angle. By doing this, you can change servo's moving range that fits your project.

Small slide switch is for switching modes between regular servo and 360˚ continuous servo.

Application