4-key keyboard using ATtiny85
The 1-key keyboard project utilizes the ATTiny microcontroller, a compact and efficient device suitable for a variety of embedded systems applications. The primary function of this project is to create a simple input mechanism using a single key, which can be employed in various scenarios such as triggering events, sending signals, or controlling devices.
The circuit design typically involves connecting a push-button switch to one of the digital input pins of the ATTiny microcontroller. When the button is pressed, it sends a signal to the microcontroller, which can then be programmed to execute a specific function, such as lighting an LED, sending a signal to another device via a communication protocol, or activating a relay.
To ensure reliable operation, a pull-up resistor is often included in the circuit. This resistor connects the input pin to the positive supply voltage, keeping the pin in a high state when the button is not pressed. When the button is pressed, the input pin is connected to ground, resulting in a low state. Debouncing techniques may also be implemented in the software to prevent false triggering due to mechanical bouncing of the switch contacts.
Power supply considerations are crucial for the ATTiny microcontroller, which typically operates within a voltage range of 1.8V to 5.5V. A simple battery or a regulated power supply can be used to provide the required voltage. The microcontroller can be programmed using a suitable development environment, with code that defines the behavior of the system based on the button press.
In summary, the 1-key keyboard project serves as a practical application of the ATTiny microcontroller, demonstrating its versatility and effectiveness in creating simple yet functional electronic devices.A good while back, I made the 1-key-keyboard project. Ever since it has always been in the back of my mind that the ATTiny microcontroller. 🔗 External reference
Related Circuits
The circuit illustrated below represents a simple thermometer circuit based on the LM335 temperature sensor. This circuit comprises two main components: the LM335 sensor and its adjustment circuitry. The output from the LM335 generates a voltage of 10 millivolts...
The 555 timer generates a reliable delay, enabling the driver to deactivate the alarm and eliminating the need for an external control switch that could be compromised. Additionally, the RCS prevents the activation of timer B unless it is...
This is a simple high-pass filter that performs filtering at high frequencies. It can only change these frequencies using the IC 741, which is an integrated circuit operational amplifier used in the circuit. The high-pass filter designed with the IC...
This tutorial provides guidance on creating a USB device, specifically a simple generic HID device using a breadboard. It covers the development of firmware for the PIC18F microcontroller and the creation of a Windows interface to control an LED...
This circuit diagram illustrates a simple electronic combination lock utilizing the IC LS7220. It is designed to activate a relay for controlling any device (on & off) when a specific combination of four digits is entered. The circuit operates...
12V power inverter circuit utilizing a 555 timer for an electronic project. The 12V power inverter circuit is designed to convert a DC voltage of 12 volts into an AC voltage suitable for powering small electronic devices. The core component...