Uploaded May 2017 | Updated September 2026, 2 weeks ago
This is part 23 of the Blockchain tutorial explaining what a ledger is.
This tutorial explains the differences between:
- a centralised and a distributed ledger
- a public ledger (permissionless ledger) and a private ledger (permissioned ledger)
In this video series different topics will be explained which will help you to understand blockchain.
Bitcoin released as open source software in 2009 is a cryptocurrency invented by Satoshi Nakamoto (unidentified person or group of persons).
After the introduction of Bitcoin many Bitcoin alternatives were created. These alternate cryptocurrencies are called Altcoins (Litecoin, Dodgecoin etc).
Bitcoin's underlying technology is called Blockchain.
The Blockchain is a distributed decentralized incorruptible database (ledger) that records blocks of digital information. Each block contains a timestamp and a link to a previous block.
Soon people realises that there many other use cases where the Blockchain technology can be applied and not just as a cryptocurrency application.
New Blockchain platforms were created based on the Blockchain technology, one of which is called Ethereum.
Ethereum focuses on running programming code, called smart contracts, on any decentralized application.
Using the new Blockchain platforms, Blockchain technology can be used in supply chain management, healthcare, real estate, identity management, voting, internet of things, etcetera, just to name a few.
Today there is a growing interest in Blockchain not only in the financial sector but also in other sectors.
Explaining how Blockchain works is not easy and for many the Blockchain technology remains an elusive concept.
This video series tries to explain Blockchain to a large audience but from the bottom up.
Keywords often used in Blockchain conversation will be explained.
Each Blockchain video is short and to the point.
It is recommended to watch each video sequentially as I may refer to certain Blockchain topics explained earlier.
Check out all my other Blockchain tutorial videos
goo.gl/aMTFHU
Subscribe to my YouTube channel
goo.gl/61NFzK
The presentation used in this video tutorial can be found at:
mobilefish.com/developer/blockchain/blockchain_quickguide_tutorial.html
#mobilefish #blockchain #bitcoin #cryptocurrency #ethereum
This is part 23 of the Blockchain tutorial explaining what a ledger is.
This tutorial explains the differences between:
- a centralised and a distributed ledger
- a public ledger (permissionless ledger) and a private ledger (permissioned ledger)
In this video series different topics will be explained which will help you to understand blockchain.
Bitcoin released as open source software in 2009 is a cryptocurrency invented by Satoshi Nakamoto (unidentified person or group of persons).
After the introduction of Bitcoin many Bitcoin alternatives were created. These alternate cryptocurrencies are called Altcoins (Litecoin, Dodgecoin etc).
Bitcoin's underlying technology is called Blockchain.
The Blockchain is a distributed decentralized incorruptible database (ledger) that records blocks of digital information. Each block contains a timestamp and a link to a previous block.
Soon people realises that there many other use cases where the Blockchain technology can be applied and not just as a cryptocurrency application.
New Blockchain platforms were created based on the Blockchain technology, one of which is called Ethereum.
Ethereum focuses on running programming code, called smart contracts, on any decentralized application.
Using the new Blockchain platforms, Blockchain technology can be used in supply chain management, healthcare, real estate, identity management, voting, internet of things, etcetera, just to name a few.
Today there is a growing interest in Blockchain not only in the financial sector but also in other sectors.
Explaining how Blockchain works is not easy and for many the Blockchain technology remains an elusive concept.
This video series tries to explain Blockchain to a large audience but from the bottom up.
Keywords often used in Blockchain conversation will be explained.
Each Blockchain video is short and to the point.
It is recommended to watch each video sequentially as I may refer to certain Blockchain topics explained earlier.
Check out all my other Blockchain tutorial videos
goo.gl/aMTFHU
Subscribe to my YouTube channel
goo.gl/61NFzK
The presentation used in this video tutorial can be found at:
mobilefish.com/developer/blockchain/blockchain_quickguide_tutorial.html
#mobilefish #blockchain #bitcoin #cryptocurrency #ethereum








![LoRa/LoRaWAN tutorial 1: IoT, LPWAN, Semtech, LoRa
If you like this video and want to support me, go this page for my donation Paypal or crypto addresses:
https://www.youtube.com/c/mobilefish/about
This is part 1 of the LoRa/LoRaWAN tutorial.
In this video series different topics will be explained which will help you to understand LoRa/LoRaWAN.
It is recommended to watch each video sequentially as I may refer to certain LoRa/LoRaWAN topics explained earlier.
In this video I will explain why LoRa is used in IoT projects.
The Internet of Things, or IoT, is a network of physical devices that are connected to the Internet and are able to talk to each other.
The prediction is that by 2020 there will be over 25 billion devices connected to the Internet.
There are many wireless technologies you can use to connect these devices to the Internet, such as:
- Short-range wireless communication
- Cellular communication
- LPWAN communication
In this video series I will be using equations and other information taken from several sources.
In my presentations these sources are referenced by the label [ref no].
1. Semtech: AN1200.22 - LoRa Modulation Basics (Revision 2, May 2015)
https://www.semtech.com/uploads/documents/an1200.22.pdf
2. Semtech: SX1276/77/78/79 Datasheet (Rev. 5, August 2016)
https://www.semtech.com/uploads/documents/DS_SX1276-7-8-9_W_APP_V5.pdf
3. Semtech: AN1200.13 - SX1272/3/6/7/8 LoRa Modem Design Guide (Revision 1, July 2013)
https://www.semtech.com/uploads/documents/LoraDesignGuide_STD.pdf
4. LoRa Alliance, Inc: LoRaWAN specification
https://lora-alliance.org/lorawan-for-developers
All my presentations used in this video series can be found here:
https://www.mobilefish.com/developer/lorawan/lorawan_quickguide_tutorial.html
LPWAN stands for Low Power Wide Area Network and this type of wireless communication is designed for sending small data packages over long distances, operating on a battery.
There are a number of competing technologies in the LPWAN space such as: Narrowband IoT (NB-IoT), Sigfox, LoRa and others.
In this video series I will only be focussing on LoRa.
The LoRa wireless technology was developed by a French start-up company Cycleo which developed the LoRa modulation technology.
In 2012 the Semtech Corporation (NASDAQ: SMTC) acquired Cycleo.
The LoRa radio and modulation part is patented and its source is closed.
Semtech has licensed its LoRa intellectual property (ip) to other chip manufacturers, such as HopeRF, Microchip, Dorji, etc.
The word LORA is a trademark of Semtech Corporation, filed in 2015.
More information about Semtech:
https://www.semtech.com/lora
The range between LoRa sender and receiver depends on the environment the equipment operates in.
Indoor coverage largely depends on the type of building material used.
Some notable records:
Andreas Spiess, ground to ground connection: 212 km (= 131.73 miles)
Weather balloon to ground connection: 702.67 km (= 436.61 miles)
Few use cases using LoRa technology:
- Smart utilities
Power transformer monitoring
Water level monitoring
Utility meter
Fuel monitoring (monitoring fuel levels in fuel tanks for heating houses)
- Health & Hygiene
Temperature / humidity monitoring
Environmental monitoring
Waste management (monitoring waste level in waste bins)
- Safety
Smart lightning
Water level monitoring
Radioactivity level monitoring
Dike monitoring (prevent peat dikes from drying out)
- Efficiency
Asset management (e.g. tracking containers, pallets, etc.)
Fleet management (e.g. tracking cars, vans, trucks, etc.)
- Agriculture
Monitoring animal welfare
Monitoring plant growing conditions
Check out all my other LoRa/LoRaWAN tutorial videos:
https://www.youtube.com/playlist?list=PLmL13yqb6OxdeOi97EvI8QeO8o-PqeQ0g
Subscribe to my YouTube channel:
https://www.youtube.com/channel/UCG5_CT_KjexxjbgNE4lVGkg?sub_confirmation=1
The presentation used in this video tutorial can be found at:
https://www.mobilefish.com/developer/lorawan/lorawan_quickguide_tutorial.html
#mobilefish #lora #lorawan LoRa/LoRaWAN tutorial 1: IoT, LPWAN, Semtech, LoRa](https://i.ytimg.com/vi/cUhAyyzlv2o/mqdefault.jpg)

