XS Boost, A Chef's Salad Solar Robot Like most robot builders, I tend to accumulate interesting parts and experimental concepts that never end up being necessary in an ordinary robot design. So, every once in a while, I build a robot without a purpose just to try out a bunch of new pieces and reduce the pile. XS Boost is a chef’s salad robot -- a hearty combination of things that were lying around. Left: XS Boost compared to an ordinary soft drink can. The robot is actually more difficult to photograph than it might seem. Vital Statistics Base Dimensions: 9 cm width x 9 cm length x 7 cm height (excluding sensors and solar cell) Total Mass: 181 grams Power Source (solar): 5.5 V (open circuit) 30 mA (short circuit) 37 mm x 66 mm solar panel Power Source (battery): 2 x 1.2 V N-cell NiMH rechargeable Speed (solar): 1.5 cm/s (swapped gears, in summer, sunny), 0.24 cm/s (as pictured, in sunny winter) Speed (battery): 6.30 cm/s Left: XS Boost overhead / head on. Solar Cell Sensors Part: Siemens BPW-34 1/8in. square solar cell. Movies
Current Monitoring The next step is to track the current being consumed by a load, or produced by a source. We are using a ACS715 Hall Effect sensor to track the current being passed. Update! ACS714 Bidirectional current sensor now being deployed. This will enable a battery "gas gauge" for "AH IN - AH OUT = AMP Remaining" type monitoring.
Weller Magnastat Autopsy and Repair » Code and Life Immediately after soldering together my USB password thingy, my solder iron, the family heirloom Weller Magnastat stopped working. Some investigation showed that the base station was providing 24V AC voltage just fine, so I decided to unassemble the handpiece to see if something could be done. Here’s what I found: It turned out my iron was salvageable; read on to learn a bit about the Magnastat and how I was able to repair mine. Magnastat basics The construction of the device is surprisingly simple (see this image): The first (blue) wire from A/C power unit goes straight to the heating element (first red wire with black tube around it). A long tube goes “out” the handle part into the iron tip, and the tip is placed at the head. Note that in my model the tip and the magnastat are one solid piece (magnastat is in the base of the tip), newer models have a separate magnastat and tip, and you can change the target temperature just by changing the magnastat part. Reviving the old Weller
12/24V 10/15/20A DC Switch Switching Power Supply for LED Strip light 180V-240V Versand nach: Weltweit Ausgeschlossen: Neuseeland, Fidschi, Papua-Neuguinea, Guadeloupe, Marshallinseln, Wallis und Futuna, Gambia, Malaysia, Mayotte, Taiwan, Polen, Suriname, Oman, Kenia, Vereinigte Arabische Emirate, Argentinien, Naher Osten, Guinea-Bissau, Togo, Senegal, Armenien, Bhutan, Usbekistan, Irland, Katar, Falklandinseln (Malwinen), Niederlande, Burundi, Slowakei, Irak, Äquatorialguinea, Slowenien, Thailand, Nordamerika, Aruba, Amerikanisch-Samoa, Schweden, Island, Mazedonien, Liechtenstein, Israel, Kuwait, Belgien, Algerien, Benin, Russische Föderation, Ozeanien, Antigua und Barbuda, Italien, Swasiland, Pakistan, Tansania, Ukraine, Singapur, Panama, Burkina Faso, Jersey, Kirgisistan, Schweiz, Réunion, Dschibuti, Chile, Puerto Rico, China, Mali, Kroatien, Botsuana, Kambodscha, Portugal, Indonesien, Malta, Tadschikistan, Vietnam, Paraguay, Kaiman-Inseln, St.
Immaterials: light painting WiFi “The complex technologies the networked city relies upon to produce its effects remain distressingly opaque, even to those exposed to them on a daily basis.” – Adam Greenfield (2009) Immaterials: light painting WiFi film by Timo Arnall, Jørn Knutsen and Einar Sneve Martinussen. This project explores the invisible terrain of WiFi networks in urban spaces by light painting signal strength in long-exposure photographs. A four-metre tall measuring rod with 80 points of light reveals cross-sections through WiFi networks using a photographic technique called light-painting. This builds on a technique that was invented for the 2009 film ‘Immaterials: the Ghost in the Field’ which probed the edges of the invisible fields that surround RFID readers and tags in the world. While we were mapping out tiny RFID fields, we wondered what it would be like to apply the light painting process to larger-scale fields of Bluetooth, WiFi, GSM and 3G. Lots more visualisations and ‘making of’ pictures.
Power Smart Heads - BEAM Robotics Wiki From BEAM Robotics Wiki The power smart family of head designs spring from a simple battery-powered design by Wilf Rigter. Unlike simple bicore heads, Power Smart Heads turn off their motors when they are centered on the light source they are tracking. Consequently, they do not waste the energy that bicore heads do as a result of the fact that bicore heads oscillate when they are centered on the light source. Hence power smart heads operate more efficiently than bicore heads.  Original Version Wilf's original Power Smart Head article BEAM Heads 101 contains a complete explanation of his original design, but he recently posted this explanation of its workings: The PD1 / PD2 photobridge acts as a voltage divider with the midpoint at Vcc / 2 when the light on each PD is equal. The hi / lo oscillator uses R1 / C1 to set the basic frequency. With an R1 to R3 = 10 to 1 ratio, the frequency and the duty cycle varies when the PD output voltage is within 10% (+ / -) of the threshold.
How to Create Practically Anything, Part 1: Fritzing Circuit Boards How to Create Practically Anything, Part 1: Fritzing Circuit Boards Making your own circuit boards can be a daunting challenge. You have to design a schematic, test it on a breadboard, design the board layout, and then after all of that, you still have to print and etch a board! Luckily, we have Fritzing. Fritzing is a free open-source PCB design suite that works on Windows, Mac, and Linux. Step 1 Download and Install Fritzing Go to the Fritzing download page and select your operating system. Image by ArduinoGRC Step 2 Getting Started When you first open a Fritzing project, you will start on the breadboard screen as shown below. To the right of the screen is our menu bar with all of the components and options. The first thing we want to do is place a component down on the breadboard. Drag the resistor down to the breadboard so that each lead is connected to a vertical column on the board. Step 3 Customizing Parts Next in the circuit comes an LED light. Congratulations! Step 4 Schematic Ta-da!
Système canadien de référence spatiale - Calcul inverse géodésique Démonstration en ligne News: CGVD2013 is now available! Natural Resources Canada has released the Canadian Geodetic Vertical Datum of 2013 (CGVD2013), which is now the new reference standard for heights across Canada. This new height reference system is replacing the Canadian Geodetic Vertical Datum of 1928 (CGVD28), which was adopted officially by an Order in Council in 1935. Read more Geodetic reference systems stem from the need to provide a consistent and integrated reference surface for data analysis. This site provides end-users with the geodetic data and tools they need for a range of commercial and private uses. Date modified:
12V 30A 360W Switch Power Supply Driver For LED Strip Light Display 220/110V #14 Versand nach: Weltweit Ausgeschlossen: Mittelamerika und Karibik, Afghanistan, Armenien, Bangladesch, Bhutan, China, Georgien, Indien, Malediven, Mongolei, Nepal, Amerikanisch-Samoa, Cookinseln, Fidschi, Französisch-Polynesien, Kiribati, Marshallinseln, Mikronesien, Nauru, Neukaledonien, Niue, Palau, Papua-Neuguinea, Salomonen, Tonga, Tuvalu, Vanuatu, Wallis und Futuna, Zypern, Algerien, Angola, Benin, Botsuana, Burkina Faso, Burundi, Kamerun, Kap Verde, Zentralafrikanische Republik, Tschad, Komoren, Kongo, Demokratische Republik, Kongo, Republik, Elfenbeinküste (Côte d'Ivoire), Dschibuti, Ägypten, Äquatorialguinea, Eritrea, Äthiopien, Gabun, Gambia, Ghana, Guinea, Guinea-Bissau, Kenia, Lesotho, Liberia, Libyen, Madagaskar, Malawi, Mali, Mauretanien, Mauritius, Mayotte, Marokko, Mosambik, Namibia, Niger, Nigeria, Réunion, Ruanda, St.
Links Switchers A switching power supply is a device transforming the voltage from one level to another. Typically it is taken from the mains and transformed to the DC levels that logic requires in a PC or a battery loader. The main differences between the linear and switched-mode regulator are in the size, weight and efficiency. Since a switched-mode converter can operate at significantly high frequencies, then a smaller transformer using ferrite cores can be used. Also since the high rectified mains voltage is chopped, then energy storage for hold-up can be accomplished on the primary side of the step-down transformer and so much smaller capacitors than the linear counterpart can be used. Articles and resources
Miller Solar Engine - BEAM Robotics Wiki From BEAM Robotics Wiki Probably the smallest incarnation of the Miller SE, using SMD pieces On December 18, 1999, Dave Hrynkiw announced on the BEAM Email List that Solarbotics had licensed the Miller Solar Engine from Andrew Miller of "AM Innovations".  Introduction The Miller solar engine (also called Millerengine) uses a 1381* voltage detector (a.k.a., a voltage supervisor) IC to drive a voltage-based (type 1 solar engine) solar engine. The Miller SE is designed to increase the 1381 hysteresis to a larger value. Here's the basic circuit (It is shown as a modification to the "vanilla" 1381 SE circuit, where added components are red, deleted components are grayed out, and common components are in black):  How it works As the solar cell charges the (4700 uF) storage capacitor, the voltage across the capacitor increases with time. By choosing values for C1 and R1, we can "tweak" the performance of this circuit.  Freeforming  Calculating the 1381 Voltage
LDR-M10 HOBBY LIDAR NEW! 3D Gesture Tracking Page What is LDR-M10? LDR-M10 is the first affordable, short range Lidar with time of flight measuring capability. It is designed for fast short range detection of objects. It is perfect for use with robotics and other applications where a low power fast response sensor is needed at short ranges. LDR-M10 is a true time of flight sensor. Since the sensor has a +/- 20 Degree FOV, it outputs a voltage proportional to the range to the nearest object in the FOV. Specification Warranty LDR-M10 is warranted for 90 days from the date of purchase. Can you use multiple units next to each other without the modules interfering with each other? Yes, multiple units can share the same field of view. What will happen if I use the device beyond its intended temperature range? The device may continue to work, however it is not guaranteed to do so. Can I use an external step up power supply to boost voltage from 3.3V - 5V power? How do I make the sensor run at the lowest power that it can.
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