Dilshan Jayakody has been working on an open-source hardware project MCP4141 based digital potentiometer, that is available on GitHub: The main objective of this project is to create an experimental prototype of a digital potentiometer using Microchip’s MCP4141 IC. MCP4141 is available with end-to-end resistances of 5KΩ, 10KΩ, 50kΩ, and 100KΩ. This potentiometer-module can drive […]
Tag Archives: ATtiny13
Building a better bit-bang UART – picoUART
Ralph Doncaster writes, ” The screen shot above is from picoUART running on an ATtiny13, at a baud rate of 230.4kbps. The new UART has several improvements over my old code. To understand the improvements, it helps to understand how an asynchronous serial TTL UART works first. Most embedded systems use 81N communication, which means […]
Qi wireless power receiver from scratch
Vinod made a Qi wireless power receiver using Attiny13, that is available on GitHub: I have only two aims while trying this. The receiver should get powered by the transmitter continuously. I should be able to control the power received by adjusting the error packets, in my case I am trying to keep received voltage […]
ATtiny13 – 8bit mono class D amplifier
Łukasz Podkalicki shared a how-to on building a Class D amplifier on ATtiny13: I always wonder whether it is possible to make an amplifier of class D on ATtiny13 or not. Some time ago I found George Gardner’s project based on ATtiny85 – TinyD. It was a sign to start challenging it with ATtiny13. It took me […]
Holiday tunes from Attiny13 and SPI Flash
In clearing up the year-end mail, we noted this from Vinod sharing one of his recent hobby projects. “This is a holiday hardware hack creating WAV music player using a 512KB SPI Flash he cobbled from a damaged digital camera and the Attiny13 MCU. I implemented UART for song updating…. It is a hack with […]
125 kHz RFID reader based on ATtiny13
125 kHz RFID reader based on ATtiny13 by Vassilis Serasidis This is an 125 kHz RFID reader that is based on ATtiny13 micro-controller and an LM358 Operational Amplifier. No special RFID chip is used. The reading, decoding and printing the unique ID from 125 kHz RFID tags is made entirely in software by ATtiny13. Via […]
DIY BT mouse using resistive touch screen
Vinod S acquired some resistive touchpads and decided to interface one with a Bluetooth module so it would function as a wireless computer mouse. He explains, “I have used a cheap ATtiny13 (8 pin) microcontroller which runs at an internal 9.6MHz clock. It samples two-channel analog voltage from the touchpad. One of the GPIO pins […]
App note: PC fan control using an ATtiny13
Dumb PC fans come with 3 pin jacks, and have no PWM control. This app note explains how to make a “smart” fan from a “dumb” one by implementing PWM control using an ATtiny13 microcontroller. This application note describes the operation of 12 volt DC cooling fans typically used to supply cooling air to electronic […]