Notandi:Martin/Leikur að samrásum

Um allnokkurn tíma hefur mig dreymt um að bjóða nemendum upp á leik að samrásum; röð verkefna sem sýna hversu öflugar samrásir geta verið en gefa þeim líka innsýn inn í hvernig þær virka og trú á eigin getu til að nota þær sjálf.

Safnaði eitt sinn saman nokkrum verkefnahugmyndum en náði ekki að komast lengra með það. Samrásir sem eru sérlega gagnlegar eru:

1. 1. 555 Timer IC
   • LED Blinker: Use the 555 timer in astable mode to create a simple LED flasher.
   • Simple Sound Generator: Create a basic sound generator by connecting the 555 timer to a speaker.
   • Touch Sensor: Build a touch sensor circuit using the 555 timer.

   Sjá: The “Three Fives” Discrete 555 Timer Kit: Principles of Operation

2. 4017 Decade Counter
   • LED Chaser: Combine the 4017 with the 555 timer to create an LED chaser or running light effect.
   • Digital Counter: Build a basic digital counter to count button presses or other events.
3. LM358 Operational Amplifier

   The LM358 is a dual op-amp IC that can be used for a variety of analog signal processing applications.

   • Light Sensor: Create a light sensor circuit that turns on an LED when it gets dark.
   • Temperature Sensor: Use an LM35 temperature sensor with the LM358 to create a simple temperature monitor.
   • Audio Amplifier: Build a basic audio amplifier circuit.
4. 74HC595 Shift Register

   The 74HC595 shift register is useful for expanding the number of output pins from a microcontroller or other digital circuit.

   • Binary Counter: Use the 74HC595 to create a binary counter with LEDs.
   • Scrolling Message Display: Combine multiple 74HC595 ICs to control a larger array of LEDs for a scrolling message display.
5. LM386 Audio Amplifier

   The LM386 is a low voltage audio power amplifier. It is easy to use and can amplify small signals to drive a speaker.

   • Mini Audio Amplifier: Create a simple portable audio amplifier for a smartphone or MP3 player.
   • Voice Modulator: Build a basic voice modulator using a microphone and the LM386.
6. CD4013 Dual D Flip-Flop

   The CD4013 contains two D-type flip-flops and is useful for learning about digital logic and memory.

   • Memory Game: Create a simple memory game using the flip-flops to store button presses.
   • Frequency Divider: Use the CD4013 to divide the frequency of a clock signal from a 555 timer.