Uniwersalny tester elementów na AVR

Bardzo wygodne i przydatne narzędzie gdy chcemy szybko sprawdzić jakiś element. Wystarczy nacisnąć przycisk a urządzenie samo rozpozna włożony w zaciski element i w niespełna sekundę wyświetli szczegółowe informacje na jego temat – oraz przyporządkuje numery pinów. Zasilanie to bateria typu 6F22 (9v), wynik jest wyświetlany przez kilka sekund a następnie urządzenie samo się wyłącza celem oszczędzania energii. Niezwykle proste i tanie jak na tyle funkcji, całość opiera się na uC Atmega8 i kilku elementach zewnętrznych.

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HD44780 and Attiny13 multimeter

Simple meter on a HD44780 and Attiny13. This project has born from a pure curiosity – what we can made on this small uC? We can, and a lot. In this case this tiny will measure voltage, current, and temperature, recalculate, and in a nice way show on a 16*1 lcd. Despite on unusual solutions and few defects, it still can be used as a power supply meter. PCB dimension – only 35mm x 16mm

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Nie-zwykła żarówka – RGB

The “not-ordinary bulb”, as title say, typical glass and metal bulb with electronic inside. Powered from miniature AC-DC converter – i have used that one from 230-5V USB chargers – it has enough power (about 500mA) for few RGB leds. Next is Attiny13 (SOIC8 package) based RGB driver, it not only can change colors, but has 3 modes and an automatic color and mode saving to eeprom memory – so after power up you always will see last seen mode and color.

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Przystawka SMD do programatora

There is no need to buy expensive smd parts holders, only for programming. Very simple pcb for programming AVR’s solves these problems. Input connector from programmer is kanda 10 pin standard, and supported packages are TQFP32 (m8), TQFP44 (m32), TQFP64 (m128), SOIC8 (t13), SOIC20 (t2313), and SOIC14 (t24). There are extra 16MHz crystal oscillator and 16MHz crystal generator, with jumper for clock source select.

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Elektronic business card 85 LED

Electronic business card / scroll display. 85 SMD 0805 led’s matrix display, Atmega88V uController, and couple of other smd parts. Dimensions are 24mm x 85mm, supplied from 3V small coin battery. It will work for long time, even on discharged battery (2V). After button is pressed, device is waking-up from power-down mode and start scrolling text equivalent to pressed button. 4 text’s are saved in eeprom memory, each one can be 127 character length (128 cell is used for holding special end-char).

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High-power TV-B-GONE flashligt

High-power flashlight version of TV-B-GONE (v1.2). It uses 1W infrared emiter diode, 940nm wavelenght. Note that other wavelenght (like 850nm) will strongly decrase range of device. Led requires a collimator, i have used 25*. Note that if you want to shoot from higher distance you must put a 15*, and 45* for switch-off mane tv’s at once. Supply as in original flashlight, 3x AAA batteries. Resistor R1 is for region select, solder for EU or leave-it for US. PCB diameter is 20mm, can be sawn to 18mm.

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Interactive mug coaster

Interactive mug coaster, thanks to analog temperature sensor LM35 and uC builded-in analog-digital converter, device can read temperature from standing on it glass. Device calculates temperature and smoothly light-up our drink with slowly changed RGB colours. When temperature is under 20*C then displayed colors are cold, and when temperature is above 28*C then colors are hot. When nothing stands on device (temperatures from 20*C to 28*C) then it automatically swich off. Fusebits are: 4,8Hz internal clock, not divided by 8. Supply voltage is stabilized by 1117 type stabilizer to 3.6V. The red LED requires lower voltage, and current on that…

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2,5KV optoisolated USBASP, 1.8V-6V

Optoisolated USBASP – excellent AVR microcontrollers programmer. It can program avr’s supplied from 1.8V to 6V, and with difference of potentials beetwin programmer and avr, at 2.5kV. I used very fast optocouplers on lines MOSI, MISO, and SCK – the 6N317 (up to 10mbits) and one standard PC817 optocoupler on RST line. You must connect supply and gnd from your avr to programmer…

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