Seven Segment Display operation using Atmega32 and CD4511B Seven segment display is a frequently used device found in several applications such as queuing systems, some types of clocks and calculators. So in this article, we explain how to Interface a 7 Segment Display to the AVR Atmega32 MCU and get it working. Note: We have […]
Interface 7 Segment Display to AVR Atmega32 using CD4511B Read More »
Using LM35 Sensor and Atmega32 ADC to measure Temperature Analog to digital conversion is generally needed whenever we deal with a sensor that produces an analog output (for example: LM35 temperature sensor), which is the case for a wide range of sensors. When dealing with such sensors we have to convert the analog signal coming
How to Use ADC (Analog to Digital Converter) in AVR – Atmega32 Read More »
This small Python script takes a KiCAD board (.kicad_pcb file) and produces a 2D nice looking drawing of the board as an SVG file. This allows you to quickly and automatically create awesome pinout diagrams for your project. These diagrams are much easier to read than a labeled photo of a physical board or an
PcbDraw – KiCAD board into a nice looking 2D drawing Read More »
Introduction Previously I made a simple frequency-modulated continuous-wave (FMCW) radar that was able to detect distance of a human sized object to 100 m. It worked, but as it was made with minimal budget and there was a lot of room for improvement. FMCW radar working principle If you have read my previous articles you
Homemade 6 GHz FMCW radar Read More »
What this is A voltmeter built from an ATmega8, a 16×2 character LCD and a handful of resistors. The microcontroller’s analog-to-digital converter measures the input, the firmware converts the reading to millivolts, and the LCD shows it. There is no dedicated meter chip and no external ADC: the whole instrument is the AVR’s 10-bit converter
The simplest digital voltmeter with AVR Read More »
This article describes a simple continuity tester, based on an ATtiny85 and a piezo buzzer, designed for checking circuit wiring, or tracing out the tracks on a PCB: It has a low threshold resistance of 50Ω to avoid false positives, and passes less than 0.1mA through the circuit under test, to avoid affecting sensitive components.
10 or 12-bit DAC from the ATtiny85 Read More »
The 74181 ALU (arithmetic/logic unit) chip powered many of the minicomputers of the 1970s: it provided fast 4-bit arithmetic and logic functions, and could be combined to handle larger words, making it a key part of many CPUs. But if you look at the chip more closely, there are a few mysteries. It implements addition,
Inside the vintage 74181 ALU chip Read More »
The 1K LCD Tinyfont project packs a variable-width 8-pixel font into 383 bytes and uses it from a 930-byte application that prints UART text on a Nokia 5110 LCD. This article examines the owner’s reported figures and the storage, buffering, and input-handling questions they leave open.
1K LCD Tinyfont: A 383-Byte Variable-Width Font and a 930-Byte Display Application Read More »
Making an electronic dice is very popular among hobbyists and there are already lots of ready-made projects on the internet about this topic. Tim at Hackaday.io designed an electronic dice project for “1KB Limit” competition. But why another dice project while the internet is already crowded with similar things? Well, it’s not the subject of this
DICE10 – A miniaturized electronic die based on ATtiny10 Read More »
The problem with watching milk Milk does not politely boil at a fixed moment you can watch for. It heats unevenly, a skin forms on the surface, and the foam starts climbing well before the liquid reaches its boiling point. By the time you see the foam at the rim, the pot is usually a
Temperature alarm for boiling milk Read More »
