Изборник Затворити

Направи сам: хранилица за колица за бебе

Скраћена веза: https://pedja.supurovic.net/veza/8879

Припремајући се за летовање појавио се проблем. Бебу Јакшу је још увек најлакше хранити у његовој столици за храњење, али она је прегломазна да бисмо могли да је носимо са собом.

Мама Јелена је дошла на идеју да склопива колица која свакако носимо претворимо у хранилицу уз један додатак – послужавник. Наравно, тата је морао да буде извођач радова.

Све што вам је потребно за овај пројекат је један пластични послужавних одговарајуће величине и три до четири држача за водоводне цеви иисто толико завртња са матицама. Завртњи треба да буду са равном и што тањом главом.

Послужавник ћете лако наћи у било којој радњи која продаје посуђе а држаче у радњама која продају опрему за водоводне инсталације. […]
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Spiderpole 12m anchoring construction

Скраћена веза: https://pedja.supurovic.net/veza/8741

Spiderpole 12m made by Spiderbeam is very useful for portable ham radio activities. To do the job it must be properly anchored. This pole may be anchored at the bottom (at about height of the first element) which allows it to withstand wind speed of abut 80 km/h, and at 7 meters high using guying lines (as recommended by manufacturer) which allows surviving windows of 120 km/h.

Anchoring at the bottom seems not suitable for portable, as it requires either to have already set strong short pole (fence or something) to attach pole, or dig one into the ground. […]
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Dunax GPN-4B antenna construction details

Скраћена веза: https://pedja.supurovic.net/veza/8733

After few years of sitting on top of my apartment building I decided to bring my Dunax GPN-4B antenna down for repair as top capacitive hat was broken. I found out that there actually no technical details about fixing it. So I went through some work of gathering such information.

First I found out that manufacturer is out of business. Antenna is not in production any more and manufacturer site is down. I asked help from fellow hams, some sent me some info they had, some sent me contact info for manufacturer.I also used my own antenna to take measurements, so finally I got quite complete details that I believe could help other fellow hams trying to repair their own antennas but also ones that want to build similar antenna. […]
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ESP8266 Temperature and Humidity Web Service

Скраћена веза: https://pedja.supurovic.net/veza/8605

After I successfuly tested HTTP server using Arduino and Ethernet Shield, I decided to try to accomplish the same thing using wireless connectivity. I decided to use ESP8266 on NodeMCU board. That is microcontroler with wireless interface all in one package, and quite low priced which makes it interesting for various purposes. I used the same temperature and humidity sensor DHT-22.

ESP8266 is supported within Arduino IDE which is big plus, as one can use the same development environment.

Soon I realized that popularity of this platform is well earned. It was very easy to set it up. […]
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Arduino Temperature and Humidity Web Service

Скраћена веза: https://pedja.supurovic.net/veza/8576

I needed simple device that is able to measure temperature and make it available for collecting that info from remote places via Internet. Arduino platform was the first thought and it ended up as expected: nice and simple.

For hardware I used Arduino UNO, Ethernet Shield and DHT22 Temperature and Humidity sensor.

Ethernet Shield pinpoint matches Arduino UNO so it is simply attached on top of it. It provides RJ45 connector for ethernet connection and SD card socket which I did not need for this small project.

All pins on Ethernet Shield are pass-through which means all Arduino pins are available on the this shield too. […]
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