November 14, 2021
Take a photo from as far away as possible at maximum optical zoom to reduce parallax effect. Make sure camera lens is as vertical over the center of the object as possible. Notice how the walls of the screw terminals holes are not visible as the camera is centered accurately. Make sure the picture is […]
October 27, 2021
Unit conversion 1 inch = 25.4mm 1 bar = 14.5 psi (pounds per square inch) 1 cfm = 38.3 lpm (litres per minute) 1hp = 0.75 kW Air compressor Garnet grit blasting requires a free air delivery (FAD) of 18-22 cubic feet per minute (500-700 litres per minute) of airflow at at least 100 pounds […]
October 1, 2021
Kinetic Wind Spinners from Evergreen Garden Anthony Howe – Di-Octo Ivan Black – Hex Ivan Black – Vane Series (disc square star) Ivan Black – Golden Section George Rickey – Breaking Column The location of the pivots is not critical. The closer to the base, the more counterweight […]
May 30, 2021
Challenge “I haven’t allowed to connect up the drainage just the underslab pipework.” The underslab pipework connection to the septic is a concern. We may not have sufficient vertical distance to connect a shed floor waste and toilet to the septic line. We can’t afford to end up with a shed where the greywater / […]
May 17, 2021
The idea is that rather than anchoring to a single point at the centre of the traveller track, you anchor to two points, one off to either side of centre. This means that there is always one rope with a component of its tension that stops the car from moving, even when centered. This is […]
May 8, 2021
Photographs Click images to zoom in. Design Click button in lower right corner for full screen video playback. Bathroom is 1200mm wide x 4000mm long. Shower base is 1200mm x 1200mm. Elevations Click images to zoom in. North: East: South: West: Requirements 5 bay shed (patio, living, garage, garage, garage). 8000mm wide x 20000mm […]
April 15, 2021
A friend handed me this box of remote control goodies that were sitting on a shelf in need of some attention for me to have some fun with. Car HSP Racing 1/8th scale electric rock crawler. 2S 7.2V NiMH 1800mAh batteries with KET plug. Charger is a 9V 250mA DC wall adapter with Tamiya plug […]
February 28, 2021
Heltec Wifi 8 ESP8266 microcontroller with CP2104 USB to serial chip Integrated 0.91 inch 128×32 I2C IIC Serial Blue OLED LCD Display 3.3Vdc to 7Vdc 32MB Flash WiFi Kit 8 Source Files Based on: https://github.com/deantonious/esp8266WeatherMonitor weather.php.txt espweather.ino.txt Instructions Create ibay esp8266 (HTTP only; not HTTPS) Add domain esp8266.coeleveld.com and point it to ibay esp8266 Add […]
February 14, 2021
An A class catamaran has: Mast rotation Outhaul Downhaul Mainsheet Mast rotation There is a 30cm long horizontal stainless steel ‘arm’ on the bottom of the mast that has a rope connected underneath the trampoline cleated on top of each hull. The idea is to restrict the mast from over rotating when sailing upwind. When […]