On this webpage you will find eletronic baubles, which are not direct assigned with amateur radio. Someones are complete projects, someones are only partial solutions or ideas.
WE1 - World radio by ELV Elektronik
The broadcast radio I use at the time is usuable only for receiving of transmissions in USW/FM and DAB+. Just for DAB+ I bought it for myself. But with all radios which I found and which are usuable for DAB+, lacked the classic radio shortwave bands. And there have also my amateur radio transceiver does not have a continuous receiving area, I was pleased to found the kit for a world radio. Sure, you could just buy a world radio, but then the fun factor in homebrewing would be completely absent.
The WE1 based on the Si4844 by SiLabs. This is an integrated circuit, which receives the FM range from 64 to 109 MHz and the AM range from 504 to 1750 kHz and also covers the shortwave range from 2.3 to 28.5 MHz. The frequency and band adjustment is done purely analog.
The WE1 itself covers the following frequency bands: 87-108 MHz, 21.2-22 MHz, 17.1-18 MHz, 15-15.9 MHz, 13.4-14.2 MHz, 11.45-12.25 MHz, 9.2-10 MHz, 6.8-7.6 MHz, 5.6-6.4 MHz and 522-1665 kHz. It is therefore suitable for the receiving of the shortwave bands 13 m, 16 m, 19 m, 22 m, 25 m, 31 m, 41 m, 49 m, of the medium wave und the USW/FM range.
The receiver has a LC-display to show the frequency, a LED bar graph and a 1 W speakers (headphone operation possible). A ferrite rod is integrated on the board, a exteren loop antenna can be put in by a jack. The sensitivity is given as 30 µV AM and 2.2 µV FM. The radio can be supplied from the 3 V of two series-connected AA cells (R6). The current consumption is 45 mA if the internal loudspeaker is in use. All SMD parts are already soldered. Dimensions: 16.5 cm x 8.8 cm x 5.5 cm
The kit for the world radio WE1 (order no. 68-141729) is buyable together with a 5 V wall wart (order no. 68-091766) from ELV Elektronik.
KLU2001 - DCF77 controlled clock by ELV Elektronik
Surely many people use a clock with pointers at home, which is controlled automatically by courtesy of the signal of a time signal transmitter. Usually here in central Europe the transmitter DCF77 in Mainflingen (near Frankfurt/Main) on 77.5 kHz is in use for it. Long time hung also such a clock at the wall at home. But it had mechanically pointers, which induced strongly audible clicks at night. So I was glad, when it conking out long time before.
Actually I wanted to build myself thereafter a purely electronic analog clock, because the other available clocks have only a digital display. But I had no time for it. But recently I discovered again the clock in a catalog, which should serve once as sample for the do-it-yourself clock. The KLU2001 has 120 LEDs arranged in two circles instead of the three pointers. The hourly markings form likewise LEDs. In the center still day and month (digital) are indicated. Before I change my mind again, I fast ordered the kit.
Because all SMD parts are already soldered, so the assembly was comfortably tackled at a weekend. The clock is 19.5 cm x 19.5 cm largely and 3.5 cm deeply. It can be put on the table or hung to the wall. The front and the back panel are made from clear red perspex. For its use only a with 65 mA loadable supply terminal is necessary . It noticed to me that the used DCF77 receiver is substantially more sensitive than e.g. the one in my bell. Thus the synchronisation takes place faster and more safer.
The kit for the clock KLU2001 (order no. 68-467-26) including DCF77-module DCF-2 (order no. 68-916-10) and 12 V wall wart (order no. 68-875-63) are buyable from ELV Elektronik. The operating instructions in the online shop offers further technical details.