An ATtiny2313-based frequency meter counts T0 edges over a one-second gate and rebuilds a wide total from 8-bit overflows. This review examines the datasheet’s external-clock sampling limits and the accuracy questions the original project leaves open.
ATtiny2313 Frequency Meter: Counting Architecture and Timing Limits Read More »
So this is a bit of a continuation on my 555 timer based PWM controllers, but now using microcontrollers and MOSFETs instead of 555 ICs and transistors. I made 2 versions, one with switches for speeding up and down and the other with a potentiometer like the previous controllers. I used ATtiny25 controllers running at
AVR microcontroller based PWM fan controllers Read More »
This USB to serial (TTL) converter project is easy to build, it is simple and inexpensive. It is based on the PL2303SA USB to USART bridge from Prolific. The PL2303SA chip is not required an external crystal as the internal clock oscillator is continuously tuning up to USB bus frequency. Having chip in SO-8 packaging
USB to Serial Breakout Board for Prolific PL2303SA Read More »
AVRDUDESS 2.19 is paired with AVRDUDE 8.1 in that release, and the documented workflow starts with correct part and programmer selection, stops on a signature mismatch, and keeps verification enabled. A worked HEX example shows why an address span is not an occupancy count.
AVRDUDESS 2.19 and AVRDUDE 8.1: Part Selection, Signature Checks and Flash Verification Read More »
This is a simple project of Android Bluetooth Car with Bluetooth control. This project is open source and multiplatform: Arduino (Processing), STM32, MSP430, PIC, AVR, FEZ Panda II (.NET Micro Framework) and may be even В Raspberry Pi. To control the car used Android-device with a built-in accelerometer. Tilt forward – car goes forward, tilt to
Simple RC car for beginners (Android control via Bluetooth) Read More »
A four-channel logic analyzer is a bounded instrument: acquisition windows follow from sample-rate arithmetic, edge timestamps carry one-sided error, and timing mode shows margin that state mode hides.
Logic Analyzer Basics: Acquisition Windows, Triggers and Timing versus State Read More »
Make a Variable Resistor with 1 Million Settings Last week in my college physics lab we got to use these variable resistance ‘boxes’. They had two inputs and six dials, and could generate one million different resistances across the two inputs. I knew I had to have one, and why not make it myself? This
Make a Variable Resistor with 1 Million Settings Read More »
