This is a very basic Atmega328 development kit It includes:
- Atmega 328 8 bit microcontroller with 20 MHz crystal resonator
- PCB board with place for external components
- Power circuit that allows powering Atmega directly(2.7-5.5 V), or through a L7805 voltage regulator(8-35 V). L7805 circuit includes a thermal fuse.
- 10 pin ISP connection for programming.
Atmega328 Development Kit Guide - [Link]
Since this is a well working low budget AVR ISP progammer (by Thomas Fischl), I offer a compact single-sided THT-SMD combined layout. The circuit is identical to the official programmer, so the original firmware can be used with this board. This programmer is supported by avrdude. One of the main features is that the low speed USB protocol stack is realized directly with the used AVR controller, which makes this programmer a low budget one, about 5EUR material costs. Notice however that this programmer cannot be used with 3V3 systems without an additional level shifter.
Alternative board for USBasp AVR ISP programmer - [Link]
Picked up one of these IC test clips on eBay for a few quid.
The idea is that you clip it to a chip on a circuit board so you have easy access to the connections for use with test probes.
I’ve got a different use for it though. If you develop a circuit using an Atmega chip (like, say, a circuit you developed with an Arduino but have now moved to a custom board), reprogramming the chip is fiddly. The best way to make your circuit easily re-programmable is to build an ISP header onto your board – it’s just a 6-pin connector that lets you blast new programming onto the chip without removing it from the circuit.
DIY Atmega programming clip - [Link]
nabil’s blog: Bike Computer V0.1 Build - [via]
I’ve build the first prototype of my bike computer and have been developing the firmware for a couple of weeks now. Everything except the temperature sensor, accelerometer, servo headers, and Li-ion fuel gauge have been populated.
There have been a few minor electrical bugs like forgetting resisters for the ISP programmer, but nothing too difficult to fix for the next prototype. The bigger problems have appeared in the software world. First, the I’ve filled all 32K of the ATmega memory mainly because of lengthy sensor configurations, USB libs and FATFS. Second, RAM has become an issue when processing things like NMEA strings or drawing complex graphics. I’ve realized there is no point in having a vibrant TFT LCD screen if the 16MHz ATmega can only achieve millisecond refresh rates, which is why I’ll probably switch to some ARM processor for the next prototype. Maybe I’ll go with the STM32F4 series.
Bike Computer V0.1 Build - [Link]
I had done a project where the AVR is powered via the main 110Vac line, So I had to find a solution to be able to test my code in real life, I had look to many thing and found very cool opto-isolator, “you must check the datasheet IL717″
AVR ISP Galvanic Isolation - [Link]
This Arduino can be used for old school prototyping as well. Just use it as a standard ATmega8 and program it with the ISP connector. And it is one of the cheapest Arduino boards, that you can get. Arduino is a great prototyping platform and most of you probably know already about it. If not, check out the Arduino pages and the Arduino playground and dive into it.
Arduino Breadboard Clone – [Link]
Programming microcontrollers isn’t hard. Building a programmer makes a great first electronics project. The goal of this instructable is to explain the simple ‘in circuit serial programming’ method used with Microchip PICs.
Understanding ICSP for PIC Microcontrollers – [Link]
Fabien Royer writes:
Programming AVR microcontrollers using ISP is a simple process when the target is on a board exposing a 6 or 10-pin ISP header. But what if you have different types of AVR chips? Their SPI pins (VCC, GND, MOSI, MISO, SCK) aren’t always in the same locations.
Instead of buying different types of target boards or buying an expensive generic programmer, I built one using a small breadboard, a Universal 28 pin ZIF DIP socket and 6 male-male hookup wires that I connected to my USBtinyISP programmer.
Build a cheap, flexible AVR microcontroller programming target board – [Link]
evilmadscientist.com writes: [via]
Reading out the flash memory is straightforward with an AVR ISP programmer, such as the USBtinyISP, using avrdude from the command line. You’ll need to have a copy of the AVR toolchain– or at least avrdude –installed on your computer. There are easy installers available for Mac (Crosspack) and Windows (MHV AVR Tools) that include this software, along with the other open source tools for AVR development. Linux packages for AVR development are also available.
AVR Basics: Reading (and writing) flash contents – [Link]