Simplest and cheapest LPT Logic Analyzer. Contains only a D-SUB 25 connector, 74xx245 buffer, and few wires. That’s it. Device is based on this site, there is also PC analyzer program. This device is not caching any samples like a expensive analyzers do, all samples are maked trough a LPT port input in real time and recorded on PC.
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.
Acoustic spectrum analyzer for HD44780 LCD. This is version 2 of this device, version 1 was popular and you asked for some effects and options, so here it is :)
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
This project is a remake of an old discolights pod. Original 24V 5W bulbs are changed to 230V 40W with E14 thread. Original driver board has non-typical signal input. This driver is based on the FT245RL chip, a USB-LPT converter – so you can use it with PC applications such as discolitez. Low voltage part is supplied directly from the USB so there is no need to to use any transformer…
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.
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.
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).
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.
Miniature usb capslocker, this is exactly the same as original project, i have made even smaller board. Dimensions are: 2.5mm x 11mm x 12mm, used pcb can not be thicker than 0.75mm, else it wont fit into USB…