5/31/2023 0 Comments Opensprinkler algorithyms![]() Professor Hsen Hsu Hu (1894-1968) was director of the Fan Memorial Institute of Biology in Beijing when he collaborated with Wan-Chun Cheng (1904-1983), professor of forestry at National Central University in Zhongjing, in naming and describing Metasequoia glyptostroboides. He had been among the first from his country to study botany in the West and was the first Chinese botanist to receive a doctorate from Harvard University. Primary credit for the discovery of Metasequoia glyptostroboides belongs to Professor Hu and his Chinese colleagues. Kan of the Department of Forestry of the National Central University journeyed from Hupeh to Szechuan, and saw on the roadside at Mou-tao-chi in Wan Hsien a large deciduous tree that was called by the natives shui-sa, or water fir. This attracted the attention of Professor Kan. Unfortunately no specimens were collected at that time as all the leaves had fallen off. ![]() Lung-hsin Yang, the principal of the Agricultural High School, to collect herbarium specimens for him. Wang, a staff member of the Central Bureau of Forest Research, went to western Hupeh to explore the forests at Shen-lung-chia, and was asked by Mr. Lung-hsin Yang to go to western Hupeh by way of Wan Hsien and Enshi in order to investigate the shui-sa at Mou-tao-chi.Īt Mou-tao-chi Mr. Wang collected herbarium specimens of leafy branches and fruits of this tree and thought it to be Glyptostrobus pensilis Koch, or shui-sung, the water pine, which is a common deciduous coniferous tree in Kwangtung province found also in Kiangsi. Chung-lung Wu, an assistant in the department of forestry of the National Central University, met Mr. Wang, who gave him a branchlet of the water fir with two cones. Cheng of the same department, who considered this tree not a Glyptostrobus but a new genus, on account of the opposite character of the peltate fruiting scales, which differ from those of Glyptostrobus although the deciduous linear leaves are somewhat similar. The tree from which the type specimen of Metasequoia glyptostroboides was collected, in Modaoqi village in west central China. The drawing came to the Archives of the Arnold Arboretum through the courtesy of Dr. zpekic wrote a comment on Analogue/discrete UART reciever.Professor Cheng then sent his assistant, Mr.Nicolas Deladerrière has added a new project titled DIY ELECTRONIC PCB KITS.Nicolas Deladerrière has added a new project titled DIY ELECTRONIC PCB BOTS.zpekic liked Analogue/discrete UART reciever.spycrab liked Daisy Kite Airborne Wind Turbine.nickxippas wrote a comment on FlipClock.heinz liked 3D Printed Selectric Typeballs.Lee Hart on Retrotechtacular: Voice Controlled Typewriter Science Project In 1958.Etienne on Reviving A Legend: Mamiya RB67 Repair.frozen rabbit on Reviving A Legend: Mamiya RB67 Repair.Anthony Kouttron on Reviving A Legend: Mamiya RB67 Repair. ![]() Posted in Arduino Hacks, home hacks Tagged arduino, ethernet, open source, sprinkler controller Post navigation Whichever path you choose, be sure to swing by site and take a good look around – there is an incredibly detailed assembly and programming guide there that will be a great resource as you go along.Ĭontinue reading to see a video of the sprinkler controller in action. The pair sells kits through the web site, but you can always simply download the schematics, PCB layout files, and BoM to build one yourself. The controller works off a standard 24V AC sprinkler transformer, which means that the controller can easily act as a drop-in replacement for your existing system. At the heart of the controller is an ATmega328 running the Arduino bootloader, which means that the system is easily tweakable to fit your specific needs. Their system greatly expands on the idea of a standard sprinkler timer, adding Ethernet connectivity, web-based scheduling, and 8 separate controllable zones. ![]() Built in collaboration with Wired Magazine’s editor-in-chief, the sprinkler controller is designed to replace the limited commercial sprinkler timers that typically come with a new home sprinkler setup. Wrote in to share a great project he just recently wrapped up, an open-source sprinkler valve controller.
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