diy4fun

This is an article about my new PCB design for CMoy headphone amplifier. Main feature is that the new PCB fits exactly to the classic Altoids tin-can. This new CMoy incorporates moreover bass-boost circuit and constant current charger for 9V battery.

If you are playing with the ATmega16 or ATmega32 microcontroller in the DIP40 package you can put my sticker on it. The sticker describes function of all pins. Thanks to color printing you will easily recognize each group of pins like different ports, SPI, I2C, UART, JTAG, ADC.

This article describe assembly of the "Rotary encoder for ATS" kit. It is step by step instructions manual, you can find here the photos of the board with description for each particular step.

This equipment is dedicated for an easier control of the popular mini-transceiver AT Sprint known by ham radio operators as ATS (series ATS-2, ATS-3, A, B, B.1 compatible). Originally the ATS has just four push buttons on the top cover and in combination with the paddle it is possible to send all commands to ATS including the tuning, scanning etc. After connecting the rotary encoder accessory module an easy tune, scan and other functions are available as same as on the big size desktop transceivers. Comfort and operation is much higher even with this mini transceiver.

This article relates to my previous article Make a sound card with PCM2702. In this time I used newer IC from Texas Instruments PCM2704. Thanks to this circuit with all necessary features inside 28pins SSOP package I was able to built quite small sound card. The result is sound card with size of gumstick.

Coreduino is another clon of amazing Arduino board. Main advantage of Coreduino is compact size, minimized price and easy connection to a breadboard. If somebody don't know what Arduino is please visit website www.arduino.cc for more information, because Coreduino is based on the Arduino concept. In this post you can find information about Coreduino module, USB and Serial programmers for Coreduino.

This is a very simple and easy to build programmer for Atmel microcontrollers from AVR family. The microcontrollers must support serial programming. This programmer is connected to a PC through the RS232 serial interface and can be used with the PonyProg or Avrdude software programmer.

Make a sound card is no more a complex issue. If you use great IC PCM2702 from BURR BROWN / Texas Instruments you can create a fully functional USB sound card. This sound card can be powered from USB port and has one stereo output. You don’t need to install any driver for Windows XP and Vista, because they are already inside. This is really plug and play.

This is versatile development board for AVR microcontrollers ATmega48/88/168. It is good for testing and debugging embedded programs. It has many built-in peripheries connected to microcontroller so you can use them without soldering. ATmega microcontrollers are produced by ATMEL and they include a lot of features: I/O, Timers, PWM generators, ADC, RS232, TWI, SPI, Analog Comparator, Oscillator, EEPROM… These microcontrollers are very versatile, easy to program and easy to use. This is the reason why I like these microcontrollers and why I decided to make development board for them.

CMoy is very simple portable headphone amplifier. The amplifier was originally posted by Chu Moy on headwize.com. The best source of information about this amplifier is article How to Build the CMoy Pocket Amplifier. If you use Google, you will find many pages and pictures about CMoy. Few months ago I decided built this amplifier also. In my post you can find my experience with creating this simple but very good amplifier.

Hello Everybody,
welcome on my blog DIY4FUN. After long time thinking about making my own web site, I decided to create blog site, because I don't want waste my time fighting with HTML, CCS, ... even if I have some experience with this. On this blog I would like to share with you my experience with building electronic devices and my new ideas, advice, opinions about electronics.