EZdenki TOP
5V SD-Card-Reader
Avrdude Notes
H-Bridge Light Timer
AD9850 Sig-Gen
Ultrasonic Sensor
Dual Digital Dice
EZdenki SHOP
Contact Mike

Welcome to ezdenki.com, a blog of Mike's digital meanderings from Nagano, Japan.

Getting 5 V SD-Card Readers to work on 5 V Arduinos

Having trouble getting your (supposedly) 5 V SD-Card reader module working with your 5 V Arduino? Believe it or not, it's possible! Click here to find out how!

Notes on using avrdude.

Here are some notes on getting avrdude to work.

H-Bridge Light Timer to Drive Reverse-Parallel String of LEDs.

I wanted to add a timer to this string of reverse-parallel LEDs Here's the circuit to do it.

Signal Generator using AD9850 SSD Module, Rotary Encoder, and LCD Display

I got one of those inexpensive AD9850 DDS modules from eBay and had a go at building a simple controller for it. I wanted to adjust the frequency from 0 to 60 MHz only using a rotary encoder with a push-switch. There have been a few iterations so far, based on different microcontrollers, including an Arduino Nano, and even an ATTiny2313. Details here!

The HC-SR04 Ultrasonic Sensor on a Tiny13

Here is a tutorial of sorts based on the popular and inexpensive HC-SR04 Ultrasonic Sensor running off of an Atmel ATTiny13 in AVR assembly language. From there it's a no-brainer to get it going on any of the Atmel AVR series microcontrollers. Check it out!

What? 14 Pips and 1 Button on 5 I/O Lines!?
Mike's Dual Digital Dice on a Tiny13!

Check out my Dual Digital Dice project based on the Atmel ATTiny13 and not much else!
This project was highlighted in hackaday.com!!

Be sure to check out another great site, solderslingers.com for a lot of great deals on electronic kits and parts.