An electric hand tool that includes an electric motor, an electrical position indicator for operation by a user, and a control unit for controlling power delivery from a power supply to an electric motor, based signals received from the electrical position indicator. The electrical position sensor may be coupled to a trigger operable by a user, and the electrical position sensor may be configured to detect the relative position of the trigger and to only operate in the middle of its possible range. The control unit may determine if the signals received from the electrical position indicator are out of a defined range. If the signals received from the electrical position indicator are out of a defined range, the control unit may register a fault, such as a fully open and/or fully short fault.

To provide a protrusion drop structure and others in which when a load applied to an operating button in a back direction is smaller than a predetermined load, the bending of a printed circuit board is made sufficiently small so as not to give a feeling of strangeness when a user depresses the operating button, and when a load applied to the operating button in the back direction reaches the predetermined load, a projecting height of the operating button from a surface of a casing is reduced to less than or equal to a predetermined height. The protrusion drop structure of the present invention includes a casing; an operating button capable of being depressed, the operating button having one end that projects outside the casing and having other end disposed inside the casing; a printed circuit board supported inside the casing and having a rupturing portion that is ruptured at an area facing the other end of the operating button when a first depression load or more is applied from a one-end side to an other-end side of the operating button; and a board supporting member that is fixed to the casing and supports the printed circuit board from a back side of a surface of the rupturing portion facing the other end of the operating button, the fixation of the board supporting member to the casing being released when a second depression load or more is applied to the rupturing portion from a surface side facing the other end of the operating button to the back side.

With a resistor, a variable resistor, and a method for manufacturing a resistor according to the present invention, it is possible to eliminate lead and prevent deterioration of sliding characteristics. A resistor according to the present invention is disposed on an insulating layer. The resistor has: a more-conductive-material-containing layer containing more conductive materials than insulating materials; and a more-insulating-material-containing layer that does not contain lead and that contains more insulating materials than conductive materials. The more-conductive-material-containing layer has a polished surface. For example, the film thickness of the more-conductive-material-containing layer in a low-resistance region having a resistance value smaller than or equal to a prescribed value is larger than the film thickness of the more-insulating-material-containing layer in a high-resistance region having a resistance value larger than the prescribed value.

A slide type variable resistor with a resistance adjusting member, comprising a housing, two side rails, a circuit module, a control member and a base. The housing includes a housing limiting hole and a space. The two side rails are disposed in the space. The circuit module is disposed in the space and has a resistive circuit. The control member is disposed in the space. The control member includes an object, at least one metal brush, a handle and an elastic member. The object having a bump, and the elastic member is sleeved at the bump.

A method of fabricating a magnetoresistive device may comprise forming an electrically conductive region and forming a first seed region on one side of the electrically conductive region. A surface of the first seed region may be treated by exposing the surface to a gas. A second seed region may be formed on the treated surface of the first seed region. The method may also comprise forming a magnetically fixed region on one side of the second seed region.

A method of fabricating a magnetoresistive device may comprise forming an electrically conductive region and forming a first seed region on one side of the electrically conductive region. A surface of the first seed region may be treated by exposing the surface to a gas. A second seed region may be formed on the treated surface of the first seed region. The method may also comprise forming a magnetically fixed region on one side of the second seed region.

Embodiments are directed to techniques for providing a user-selected target resistance across a set of output terminals of a resistance-generating apparatus. The techniques include (a) assigning a first arrangement of resistance circuitry of the resistance-generating apparatus that nominally provides the target resistance based on known resistance values of a plurality of resistors of the resistance circuitry, (b) configuring the resistance circuitry according to the assigned first arrangement, thereby providing a first resistance across output terminals, (c) subsequently, receiving a resistance measurement from a measurement device configured to measure the first resistance, (d) in response to receiving the resistance measurement, assigning a second arrangement of the resistance circuitry based on a difference between the target resistance and the resistance measurement, and (e) configuring the resistance circuitry according to the assigned second arrangement, thereby providing a second resistance, the second resistance being closer to the target resistance than was the first resistance. Systems and apparatuses are also provided.

A rotary variable resistor includes a resistance circuit module, a fixation frame, a brush assembly and a rotor shaft. The resistance circuit module has a circuit board, an output circuit, three input circuits and a resistance ring. The output circuit includes a brush contact port having an annular brush contact area and an output port extending out from the brush contact port. Each input circuit has a resistor contact end and an input port. The three resistor contact ends are evenly annularly separated. The resistance ring co-axially and annularly spaced to the brush contact port contacts the resistor contact ends. The fixation frame is fixedly mounted on the resistance circuit module. The brush assembly rotatably restrained by the fixation frame bridges the annular brush contact area and the resistance ring. The rotor shaft for driving the brush assembly is connected with the brush assembly.

A resistor includes a substantially cylindrical resistive element having a resistance of less than about 1 m, a substantially cylindrical first termination electrically connected to the resistive element and a second termination electrically connected to the resistive element. The substantially cylindrical first termination is hollow to allow for accepting a connection such as from a battery cable. In addition there may be sense leads present on the resistor. A method of forming a substantially cylindrical resistor includes forming a hollow cylindrical resistor body by rolling a flat sheet comprising a resistive element and a first termination and a second termination joined on opposite ends of the resistive element.

A resistor includes a substantially cylindrical resistive element having a resistance of less than about 1 m, a substantially cylindrical first termination electrically connected to the resistive element and a second termination electrically connected to the resistive element. The substantially cylindrical first termination is hollow to allow for accepting a connection such as from a battery cable. In addition there may be sense leads present on the resistor. A method of forming a substantially cylindrical resistor includes forming a hollow cylindrical resistor body by rolling a flat sheet comprising a resistive element and a first termination and a second termination joined on opposite ends of the resistive element.