Another model from the brand Vaterra with a body 1969
Scale: 1/10
Length: 371mm
Width: 194мм with a 30-mm rear wheels
height: 112mm
Ground clearance: 6 mm
Ham radio
TRIAC CONTROLLER
Compact electronic controller, enabling a smooth and in a fairly wide range to change the brightness of the incandescent filaments, power water heater or the speed of rotation of the shaft of the AC motor, can make even inexperienced hams. Because the proposed device is familiar to many publications previous unique and well-proven technical solution: the triac with economical control by pulse-phase method. Besides the principal circuit diagram complements fleshed out a printed circuit Board with specification of the layout of the installation. And radio the design used is quite common.
UNIVERSAL BATTERY CHARGER
As you know, the cost of electrochemical cells has increased significantly. Therefore, many owners of portable radio equipment are beginning to use batteries. And they must be timely and properly charge. Of course, when the apparatus used a bit (and besides, it is all the same type), the problems with no charge. After all, to get a good charger (memory) for a renewable source of electricity in a single “radioimage” is much easier than, say, to ensure the viability and flashlight (and it 2хД-0.55 C), and all-wave receiver (5хД and 0.26 D), and tester (Sht-0,06). In addition, note that the proposed market memory in the majority of the road is not very reliable, is designed only for a certain type of batteries, and a strictly fixed number of elements.
POUR TRANSISTOR
The heat of summer. The sky is cloudless. Without irrigation the garden can not be saved. In this case, it is good to use a plant that waters itself. The device is an electronic relay on the transistor VT1, the base and the emitter of which is connected to the plates of conductive material stuck in the ground at a distance of 3 — 3.5 cm from each other. Because raw land has a low resistance, it can be considered that the base of the transistor is directly connected to its emitter (the transistor is closed). But as soon as the soil begins to dry, a semiconductor device is opened, and actuates electromagnetic relay K1 and its contact pair completing a circuit of the actuator of the electromagnet, lifting the flap of the water tank irrigation.
THE LIGHT TURNS ON AUTOMATICALLY
In the apartment rang. And here in the dark hallway you groping to find the light switch and only then open the door. About the same thing you are doing, entering the house. Is it possible to turn on the lighting automatically, for example, simultaneously with a call or when opening the front door? It is possible by installing in the hallway, a simple electrical installation.
THE TRANSDUCER PROTECTOR
Motion detectors (DD) based on the Fresnel lens and pyroelectric detectors can be used not only for its intended purpose – to turn the light on or as part of a burglar alarm installed in the room. Cars – this is perhaps the most promising area of application ideas for portable motion sensors. With the constant growth in the number of cars owned by the population, the proposal to actively use there DD can be interesting to a wide circle of people. And here’s why…
WELDING MACHINE FROM LATER
Sure: from a compact and yet sufficiently reliable, cheap and simple to manufacture “svarochnik” no workman, Thrifty, the owner will not refuse. Especially if he knew that at the heart of this machine is easily upgradable 9-ampere (familiar to almost everyone from school physics lessons) laboratory autotransformer ЛАТР2 Yes homemade mineralwater with thyristor rectifier bridge. They allow not only to safely connect to domestic lighting AC voltage of 220 V. but to change u on the electrode, and means to select the desired value of welding current.
ELECTRONIC “MATCH”
The proposed electrosurgery, I am sure, will find its rightful place in the kitchens have gas stoves, when the ignition of the gas burner appliances and other devices with the “blue fuel”. It is convenient and trouble free. It can make for a night or two, pre-armed with a small piece of one-sided foil fiberglass and a minimum of inexpensive and common parts. A faithful guide to action will serve as a sketch of the printed circuit Board and Assembly drawing.
MODE SPOT WELDING
I made welding machine is a well-proven in practice a modernized version of the device description and drawings of which are published in the journal “modelist-Konstruktor” No. 3, 1966. Most importantly — new “svarochnik” significantly more powerful than its predecessor, easier to manufacture and operate. In the absence of the kind of “bells and whistles” it allows you to securely connect steel sheet with thickness up to 3 mm. However, the mode of operation is one of the most necessary most homebrew spot welding.
TROUBLE-FREE LIGHTER
“E-match” is the name of the material on electroscience, published in No. 3 of the journal “modelist-Konstruktor”, 1999. The development will be able to find its rightful place in the kitchens have gas stoves, appliances and other devices with the “blue fuel”. Especially if the thyristor part of the self-made device to enter the additional capacitor C2 with the capacitance of 0.1 µf with subsequent correction of the values of C1, RM and B2 (wiring diagram is shown in bold lines and font).
