Warm Tube Clock v1 - User pictures
While we are waiting for PCBs of Warm Tube Clock v2, user Brok from Netherlands assembled his Warm Tube Clock v1. He soldered IN-14 Nixie tubes on IN-8 shield.
New version of Warm Tube Clock will be with DS3232/DS3231 and it will come with IN-14 and IN-16 Nixie shields. Previous versions of shields are also supported on new clock and vice versa.
In the meantime, take look at some pictures he made for us.
Web server maintenance
Dear visitors of Elektronika.ba web portal, on Saturday 02.26.2011 web site will be offline from 20:00h to 07:00h following day due to maintenance of web hosting server.
Thanks for understanding!
GeoGame project published
The idea was to make a Reverse GeoCaching box with custom hardware and cheap parts. As we already know, Reverse GeoCaching is relatively new thing where the idea is that you already have the "treasure" in your hands, but in order to access it you must go to a specific location. Once you get there, the box opens and the treasure is yours. The box doesn't show you the destination coordinates but only the distance and also a limited number of clues and that's where the fun starts.
This Reverse GeoCaching box's hardware consists roughly of: ATmega328P microcontroller, graphic display from Nokia 3310 phone with backlight, Li-Ion BL-5C battery from Nokia phone, MAX1811 Li-Ion charger IC, PC USB GPS receiver, Mini Servo and other bits and pieces.
Happy New Year 2011!
We wish a *very* Happy New Year 2011 to all of our visitors!
USB numeric keypad with RFID reader
I needed a PC numerical keypad with RFID reader, so I simply bought USB numerical keypad and added my ID-12 (TLM-20) RFID reader to it.
This RFID reader has TTL serial output so I also needed USB-UART converter. I bought a "converter cable" from a store and took out the PCB with PL2303 converter. It also comes with MAX213 (TTL-UART) voltage converter IC but I desoldered that one out since I didn't need it in the circuit.
Warm Tube Clock - Nixie Clock with 4 tubes
This clock is designed to be easy-to-build, with all usual parts - except the tubes of course, and modular - meaning you can put any kind of Nixie tube on the top "shield" board and completely redesign it's look. If you don't fancy Nixie tubes (looser!), you can multiplex other kind of display.
Clock works at voltages from 7.5V to about 14V and consumes around 200mA. The PCBs are 10cm x 3cm, so pretty small. Beware that it generates high voltages of around 200V so don't touch anything while it is operating.
Hackvision retro game platform based on AVR
Hackvision is a simple retro gaming platform based on Arduino technology that you can assemble and connect to your TV. You can write you own games and make your own controllers!
It connects directly to TV (NTSC/PAL) with standard RCA connections - audio&video, has integrated button controller on PCB, it is preloaded with 2 games: Space Invaders and Pong, and other controllers are already supported: Wii nunchuk, SuperNES, or paddle controllers you can make from a potentiometer and button, has high score files stored in EEPROM so they are retained even with power off and many more.
To upload custom games all you need is a USB to TTL serial cable or adapter.
Tiny Reverse GeoCache
GeoCaching is a high-tech treasure hunting game (sport?) with GPS system involved. By using a hand-held GPS receiver the user has to go to a specific coordinate to obtain a hidden treasure which is usually a container with fun stuff inside. Reverse GeoCaching is relatively new thing where the idea is that you already have the treasure in your hands, but in order to access it you must go to a specific location. Once you get there, the box opens and the treasure is yours. The box doesn't show you the destination coordinates but only the distance and also a limited number of clues and that's where the fun starts.
This Reverse GeoCache Box is pretty nicely engineered and built. The hardware that makes it all work is: MAX1674 step-up converter, Haicom HI-204 SiRFStar GPS receiver, PIC18F2520 microcontroller and other bits and pieces. The software is written in C and it used 10kWords of 16kWords available in the PIC.
This reminds me of good old Fox Hunting.