Tagged: limesdr mini

Hackaday’s LimeSDR Mini Review

Over on Hackaday author Jenny List has today posted a review of the LimeSDR Mini. The LimeSDR Mini is a US$139 TX/RX capable SDR that was successfully crowd funded and has recently begun shipping to initial backers. In the review Jenny goes over the specs and differences between the Mini and standard LimeSDR. She then goes on to test it in GQRX, receiving a DAB digital radio signal, and creating a simple replay attack and FM transmitter in GNU Radio.

If you're interested in the differences between an RTL-SDR and a slightly higher level yet still budget friendly SDR then this review is a good overview. If you are interested, we also did a brief unboxing and initial thoughts review of the LimeSDR Mini which is available here.

The LimeSDR Mini
The LimeSDR Mini

LimeSDR Mini Unboxing and Initial Review

The LimeSDR Mini has now started shipping out to backers, and we received our unit just last week. The LimeSDR Mini is the smaller version of the full sized LimeSDR which was released early last year in 2017. The standard LimeSDR has a frequency range of 100 kHz – 3.8 GHz, bandwidth of up to 61.44 MHz, 12-bit ADC and 2 x 2 RX/TX channels. In comparison the new LimeSDR mini has a slightly restricted frequency range of 10 MHz – 3.5 GHz, and half the maximum bandwidth at 30.72 MHz. The mini also only has 1 x 1 TX/RX channels. The price is however much less coming in at US$139 for the mini and US$299 for the standard LimeSDR.
 
In this post we’ll give a brief unboxing and review of the LimeSDR Mini. If you’re interested take a look at our previous unboxing and initial review of the standard LimeSDR as well.

Unboxing

The LimeSDR Mini came in a small black box inside an anti-static bag. No accessories like antennas are included in the package. The PCB comes without any enclosure, but an enclosure can be ordered as an additional extra. The size of the PCB is similar to an RTL-SDR, but a little wider. The RF sensitive components are covered with a shielding can. Removing the can reveals the main Lime System RF chip, the LMS7002M, as well as several RF transformer matching circuits.
 
One end of the PCB has a standard USB-A connector, whilst the other end has two SMA ports, one for receiving and the other for transmitting.
limesdrmini_box2
limesdrmini_box3
limesdrmini_box4

 

Continue reading

Hackaday’s LimeSDR Mini Review

Over on Hackaday author Jenny List has today posted a review of the LimeSDR Mini. The LimeSDR Mini is a US$139 TX/RX capable SDR that was successfully crowd funded and has recently begun shipping to initial backers. In the review Jenny goes over the specs and differences between the Mini and standard LimeSDR. She then goes on to test it in GQRX, receiving a DAB digital radio signal, and creating a simple replay attack and FM transmitter in GNU Radio.

If you're interested in the differences between an RTL-SDR and a slightly higher level yet still budget friendly SDR then this review is a good overview. If you are interested, we also did a brief unboxing and initial thoughts review of the LimeSDR Mini which is available here.

The LimeSDR Mini
The LimeSDR Mini

LimeSDR Mini Unboxing and Initial Review

The LimeSDR Mini has now started shipping out to backers, and we received our unit just last week. The LimeSDR Mini is the smaller version of the full sized LimeSDR which was released early last year in 2017. The standard LimeSDR has a frequency range of 100 kHz – 3.8 GHz, bandwidth of up to 61.44 MHz, 12-bit ADC and 2 x 2 RX/TX channels. In comparison the new LimeSDR mini has a slightly restricted frequency range of 10 MHz – 3.5 GHz, and half the maximum bandwidth at 30.72 MHz. The mini also only has 1 x 1 TX/RX channels. The price is however much less coming in at US$139 for the mini and US$299 for the standard LimeSDR.
 
In this post we’ll give a brief unboxing and review of the LimeSDR Mini. If you’re interested take a look at our previous unboxing and initial review of the standard LimeSDR as well.

Unboxing

The LimeSDR Mini came in a small black box inside an anti-static bag. No accessories like antennas are included in the package. The PCB comes without any enclosure, but an enclosure can be ordered as an additional extra. The size of the PCB is similar to an RTL-SDR, but a little wider. The RF sensitive components are covered with a shielding can. Removing the can reveals the main Lime System RF chip, the LMS7002M, as well as several RF transformer matching circuits.
 
One end of the PCB has a standard USB-A connector, whilst the other end has two SMA ports, one for receiving and the other for transmitting.
limesdrmini_box2
limesdrmini_box3
limesdrmini_box4

 

Continue reading

A Pocket DATV Transmitter and Receiver with Raspberry Pi, LimeSDR Mini and RTL-SDR

Over on YouTube user Evariste Okcestbon has uploaded a video showing his simple pocket DATV system that consists of a LimeSDR running on a Raspberry Pi Zero transmitting live camera images via DATV which is received by an RTL-SDR running on a Raspberry Pi 3.

If you didn't already know, DATV stands for Digital Amateur Television and is a digital mode somewhat similar to digital over the air TV signals that can be used by hams for transmitting their own TV signals on the ham bands. The LimeSDR Mini is a $139 US transmit and receive capable SDR that is currently crowdfunding and available for pre-order on Crowdsupply. It is expected to ship at the end of February 2018.

Evariste uses a range of software packages on each Raspberry Pi. He writes the following in the video description:

Description of a minimal Digital Tv chain : Transmitter and Receiver.

Hardware used on Tx : PiZero,Picam,LimeSDR Mini

Hardware used on Rx : Raspberry Pi 2, RTL-SDR,Monitor

Software used on Tx : avc2ts,dvb2iq,limetx

Software used on Rx : rtl_sdr,leandvb,kisspectrum,ts2es,hello_video

Softwares available on https://github.com/F5OEO
Special Thx to G4GUO, F4DAV and LimeSDR

Evariste is also the author of Rpidatv which allows you to transmit DATV directly from the GPIO pins of a Raspberry Pi without the need for any transmit capable SDR.

Pocket datv
Pocket datv

SDR Programming For Kids: LimeSDR Mini with Scratch on a Raspberry Pi 3

Scratch is a visual block based programming language aimed at getting kids into programming. Recently the LimeSDR team have been working at creating a Scratch interface for their LimeSDR Mini. It is basically working as a wrapper/interface to the processing backend which is handled by LuaRadio.

The idea is to keep the barrier of entry to SDR as low as possible, by making SDR programming accessible to kids as well. The software is currently a work in progress, but they write that they are attempting to develop the Scratch blocks necessary to enable the transmission and reception of text messages. Something like that would make a great learning tool for educators.

The video demo shows Scratch and the LimeSDR running on a Raspberry Pi 3. During the demo he creates a simple 433 MHz spectrum display by connecting up several blocks.

Scratch running with a LimeSDR Mini on a Raspberry Pi
Scratch running with a LimeSDR Mini on a Raspberry Pi