A manual operating device (100) for providing a first and a second control signal in accordance with a user's operation, e.g. for controlling electronic musical instruments, stage/theatre equipment and/or audio/video studio equipment. The manual operating device (100) comprises a linear position sensor device (110), providing the first control signal (120), representing a linear position of a longitudinally slidable element (130), and a rotary position sensor device (140), having a body attached to the longitudinally slidable element (130) and providing the second control signal (150) representing the rotary position of a rotatable shaft (160) to be manually operated by the user. A MIDI controller device (210) may include at least one such manual operating device (100). Converting the positions parameters to advanced studio equipment MIDI control signals and/or to legacy MIDI synthesizer tone control.

An electric switch for electrical devices that includes a circuit board immovably arranged in a switch housing, the circuit board includes on one of its surfaces the contact paths of a contact system as well as contact surfaces in the form of potentiometer tracks. The contact paths interact with sliding contacts of the contact system and the potentiometer tracks interact with additional sliding contacts in order to set the revolutions per minute or the torque of the electric motor, movement of the plunger causes the sliding contacts of the contact system to come into contact with the associated contact paths, and, in this position of the plunger, which is the on position of the switch, the sliding contacts used for changing the direction of rotation are in the same way already in contact with the associated potentiometer tracks on the circuit board.

An electric switch for electrical devices that includes a circuit board immovably arranged in a switch housing, the circuit board includes on one of its surfaces the contact paths of a contact system as well as contact surfaces in the form of potentiometer tracks. The contact paths interact with sliding contacts of the contact system and the potentiometer tracks interact with additional sliding contacts in order to set the revolutions per minute or the torque of the electric motor, movement of the plunger causes the sliding contacts of the contact system to come into contact with the associated contact paths, and, in this position of the plunger, which is the on position of the switch, the sliding contacts used for changing the direction of rotation are in the same way already in contact with the associated potentiometer tracks on the circuit board.

A manual operating device (100) for providing a first and a second control signal in accordance with a user's operation, e.g. for controlling electronic musical instruments, stage/theatre equipment and/or audio/video studio equipment. The manual operating device (100) comprises a linear position sensor device (110), providing the first control signal (120), representing a linear position of a longitudinally slidable element (130), and a rotary position sensor device (140), having a body attached to the longitudinally slidable element (130) and providing the second control signal (150) representing the rotary position of a rotatable shaft (160) to be manually operated by the user. A MIDI controller device (210) may include at least one such manual operating device (100). Converting the positions parameters to advanced studio equipment MIDI control signals and/or to legacy MIDI synthesizer tone control.

A manual operating device (100) for providing a first and a second control signal in accordance with a user's operation, e.g. for controlling electronic musical instruments, stage/theatre equipment and/or audio/video studio equipment. The manual operating device (100) comprises a linear position sensor device (110), providing the first control signal (120), representing a linear position of a longitudinally slidable element (130), and a rotary position sensor device (140), having a body attached to the longitudinally slidable element (130) and providing the second control signal (150) representing the rotary position of a rotatable shaft (160) to be manually operated by the user. A MIDI controller device (210) may include at least one such manual operating device (100). Converting the positions parameters to advanced studio equipment MIDI control signals and/or to legacy MIDI synthesizer tone control.

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 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 variable resistor with a light emitting element includes a circuit board, a housing and a slide assembly. The circuit board extending in a longitudinal direction has a circuit arrangement surface to arrange thereon a resistive circuit and a power circuit. The housing fixed to the circuit board so as to form a slide space has a sliding slot extending in the longitudinal direction. The slide assembly further includes a slidable member, a fader set, a light emitting element, a resistive circuit brush and two light-emitting element brushes. The fader set fixed at the slidable member penetrates the sliding slot. The light emitting element in an accommodating groove of the slidable member projects a light beam toward the fader set. The resistive circuit brush electrically connects the resistive circuit. The two light-emitting element brushes electrically bridge the power circuit and the light emitting element.

A variable resistor with a light emitting element includes a circuit board, a housing and a slide assembly. The circuit board extending in a longitudinal direction has a circuit arrangement surface to arrange thereon a resistive circuit and a power circuit. The housing fixed to the circuit board so as to form a slide space has a sliding slot extending in the longitudinal direction. The slide assembly further includes a slidable member, a fader set, a light emitting element, a resistive circuit brush and two light-emitting element brushes. The fader set fixed at the slidable member penetrates the sliding slot. The light emitting element in an accommodating groove of the slidable member projects a light beam toward the fader set. The resistive circuit brush electrically connects the resistive circuit. The two light-emitting element brushes electrically bridge the power circuit and the light emitting element.

A sliding variable resistor includes a sliding base, a first supporting pole, two buffering members, a substrate, a casing assembly, an anchoring plate, a driving member, a driven member, a belt, and a belt guard. The sliding base includes two first through hole and at least one variable resistor sheet. The first supporting pole is inserted into the two first through hole. The first supporting pole has its two ends abut against the first buffering seats, respectively. The substrate is engaged with the two buffering members. The two buffering members are arranged in the casing assembly. The anchoring plate is fixedly arranged on the casing assembly. The belt is engaged with the driving member and the driven member, respectively. The belt guard is fastened to the sliding base, and is engaged with the belt. As such, the sliding base, while sliding, can have an improved smoothness.