We’ve all been told to take 5 minute showers. However, do we really know how long our showers actually are?
Here’s a simple weekend project that is both fun and practical. This circuit uses an ATtiny85 chip that automatically starts a timer as soon as you close your shower door. When 5 minutes are up, a piezo speaker starts beeping to let you know that time is up. If you finish your shower early, the timer resets.
• 8-Pin IC Socket
• SPST or SPDT Limit Switch (also called Microswitch)
• 8 ohm Piezo Speaker
• Green LED
• Red LED
• LED Holder – 5mm (2x)
• 220 ohm Resistors (2x)
• Male and Female Header Pins
• Mini Solder-able Breadboard
• Stranded Hook-up Wire 22 AWG
• 2x AAA Battery Holder
• AAA Batteries (2x)
• Adhesive Velcro Strips
• Small Project Box or Enclosure
( Most of these materials can be purchased from Sparkfun Electronics )
Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.