Abstract: A drop test apparatus includes a base panel, at least one height adjustment member attached to the base panel, and at least one angle adjustment member pivotally attached to the at least one height adjustment member. The at least one height adjustment member has a portion protruding upward from the base panel. A height of the portion is variable. The at least one angle adjustment member is configured for supporting a device thereon and capable of rotating to different angles.

Abstract: A power supply test system for testing reliability of a power supply includes a voltage input circuit, a voltage storage circuit, a voltage output circuit, and a discharge circuit. The voltage input circuit receives a first AC voltage, and converts the first AC voltage to a first DC voltage to charge the voltage storage circuit. The voltage storage circuit receives the first DC voltage, and discharges to the power supply via the voltage output circuit when the voltage storage circuit is fully charged. The voltage storage circuit discharges remaining voltages via the discharge circuit when the test is complete.

Abstract: A power circuit includes an input terminal receiving alternating current, a first AC filtering circuit connected to the input terminal, a bridge rectifier circuit, a DC filtering circuit, a DPDT switch, and an output terminal. Two input ends of the bridge rectifier circuit are connected to the first AC filtering circuit. The DPDT switch includes a first pair of pins, a second pair of pins, and a pair of output pins. The first pair of pins is connected to the DC filtering circuit. The second pair of pins is connected to the input terminal. The DC filtering circuit is connected to the pair of output pins of the DPDT switch. The first pair of pins is switched on to enable the output terminal to output direct current, and the second pair of pins is switched on to enable the output terminal to output alternating current.

Abstract: A fan rotation speed detection system includes a sampling and modulating unit, a lighting unit, a light sensing unit, a demodulating unit, and a control chip. The sampling and modulating unit generates a sampling frequency signal. The sampling frequency signal is a square wave signal. The lighting unit emits light on fan blades of a fan when the square wave signal is at a high level. The light sensing unit senses light reflected from the fan blades and generate a detection signal. The demodulating unit demodulates the detection signal to generate a demodulated signal when the square wave signal is at a high level. The control chip accounts a rotation speed of the fan according to the demodulated signal.

Abstract: A thermocouple welding test apparatus for testing whether a thermocouple is normally welded includes a first comparison circuit, a second comparison circuit, a switch circuit and an indication circuit. The first comparison circuit receives a first DC voltage from the thermocouple, and compares the first DC voltage with a first reference voltage to output a first control signal. The second comparison circuit receives a second DC voltage from the thermocouple, and compares the second DC voltage with a second reference voltage to output a second control signal. The switch circuit receives the first control signal and the second control signal, and outputs an indication signal accordingly. The indication circuit receives the indication signal, and indicates whether the thermocouple is normally welded accordingly.

Abstract: A thermal grease smearing apparatus includes a platform for placing a heat sink, a supporting post projecting from the platform, and a bracket mounted to the supporting post. The bracket includes a bottom plate with a smearing hole. A thermal grease pipe is mounted to the bracket and includes a pipe body having an upper opening for introducing thermal grease and a lower opening for applying the thermal grease onto a bottom surface of the heat sink. When the bracket is positioned in a working position, the bottom surface aligns with a the smearing hole and abuts a lower surface of the bottom plate, a smearing portion contacts with the thermal grease applied onto the bottom surface and is actuated to rotate about a central axis of the thermal grease pipe thereby smearing the thermal grease uniformly spread on the bottom surface of the heat sink.

Abstract: A measuring device includes a bracket and a sliding ruler. The bracket includes a base and a first side plate. The sliding ruler is slidably attached to the bracket and includes a top wall and a first sidewall. The first side plate includes a first top surface, a first set of scale lines, and first scale values marking the first set of scale lines. The first scale values increase incrementally from the base to a scale value N at the first top surface. A distance between the first top surface and a bottom surface of the base is equal to the scale value N. The first sidewall includes second set of scale lines, and second scale values marking the second set of scale lines. The second scale values decrease incrementally from the base to the scale value N at the top wall.

Abstract: A temperature test system for detecting temperatures in a test chamber includes a switch module, a detecting module, a control module, a decoding module and a display module. The switch module inputs test instructions to select a test position in the test chamber. The detecting module detects a temperature signal of the test position according to the test instructions. The control module receives the temperature signal, and converts the temperature signal to a temperature value. The decoding module decodes the temperature value to digital signals. The display module receives the digital signals to display.

Abstract: A measuring device includes a bracket, a sliding ruler, a securing assembly, and a driving assembly. The bracket includes a first set of scale lines. The sliding ruler is slidably attached to the bracket and includes a second set of scale lines. The securing assembly includes a securing member and a resilient member mounted to the securing member. The driving assembly is rotatably attached to the bracket and includes a handle and a gear secured to the handle. The gear is rotatable to slide the sliding ruler relative to the bracket; the securing member is secured to the bracket, and the resilient member is secured between the sliding ruler and the bracket, to prevent the sliding ruler from sliding relative to the bracket.

Abstract: A test support apparatus includes a base, a support bracket, a first positioning member mounted to the support bracket; and a positioning arm. The support bracket is pivotally mounted to the base and keeps an angle relative to the base. The support bracket supports a product. The positioning arm defines an elongated positioning slot. The positioning arm is mounted to the base. The first positioning member is positioned in different positions of the elongated positioning slot to change the angle.

Abstract: A system for testing electronic device includes an electronic device, a temperature detecting module, a testing instrument and a testing computer. The testing electronic includes a main board and a power supply. The main board includes a slot and a card inserted in the slot. A plurality of dummy loads is located on the card. The slot includes at least one voltage interface. The power supply includes at least one power wire electrically connected to the at least one voltage interface. The temperature detecting module detects temperature signals of the plurality of dummy loads. The testing instrument is electrically connected to the at least one power wire to test current signals or power signals of the at least one power wire. The testing computer receives and displays the temperature signals, the current signals and the power signals.

Abstract: A power supply switch apparatus includes a voltage decreasing circuit, a rectification circuit, a comparison circuit, and a control circuit. The voltage decreasing circuit receives a first alternating voltage output from a power supply and converts the first alternating voltage to a second alternating voltage. The rectification circuit receives the second alternating voltage and converts the second alternating voltage to a first direct voltage. The voltage regulating circuit receives the first direct voltage and converts the first direct voltage to a second direct voltage. The comparison circuit receives the second direct voltage, compares the second direct voltage with a reference voltage, and outputs a control signal. The control circuit receives the control circuit and connects the power supply to different circuits according to the control circuit.

Abstract: A testing apparatus includes a retaining panel, a screw pole, two securing panels moveably attached to the screw pole, and two mounting members. Each of the two securing panels is slidably attached to the retaining panel. Each of the two mounting member is engaged with each of the two securing panels. The two securing panels are moveable relative to the screw pole for sandwiching an electronic device, and each of the two mounting member is engaged with the screw pole, for prevent the two securing panels from disengaged from the electronic device.

Abstract: A testing apparatus includes a securing member, a first clipping panel, a second clipping panel, two mounting members, and a sliding member. The securing member includes a screw pole. The first clipping panel is secured to the screw pole. The second clipping panel is moveably attached to the screw pole, and the first clipping panel and the second clipping panel are attached to opposite side plates of an electronic device. The two mounting members are attached to the screw pole and located on opposite sides of the second clipping panel, for preventing the second clipping panel from disengaging from the electronic device. The sliding member is slidably attached to the screw pole and located between the first clipping panel and the second clipping panel, for moving the electronic device.

Abstract: A noise testing system includes an electronic device, a noise meter and a testing desk. The electronic device includes a plurality of separated electronic components. The noise meter is used to test a noise generated by the electronic device. The testing desk includes a surface. A plurality of scale markings is defined in the surface, and a plurality of scale value is labeled on the surface and correspond to the plurality of scale marking. A first distance between every two of the plurality of separated electronic components and a second distance between the noise meter and each of the plurality of separated electronic components is adjusted to be in a fixed range according to the plurality of scale marking. A noise testing method based upon the above noise testing system is further disclosed.

Abstract: A positioning tool includes an actuating member and a rotating member rotatably attached to the actuating member. The actuating member includes a supporting lump. Two positioning pins are located on the supporting lump. The rotating member includes a rotating plate located between the two positioning pins. Three latching pins are located on the rotating plate.

Abstract: A smearing apparatus includes a supporting tray, a rotating cabinet rotatably attached to the supporting tray, and an operating member rotatably attached to the supporting tray. The supporting tray includes a smearing piece. The rotating cabinet is used to receive a heat sink. The operating member is engaged with the rotating cabinet and rotatable about a first axis to rotate the rotating cabinet about a second axis that is substantially perpendicular to the first axis, so that a center portion of the heat sink is smeared by the smearing piece.

Abstract: A testing apparatus includes a support mechanism, a pushing device and a clamping device. The pushing device includes a guiding member, a driving member moveably attached to the guiding member, and a resilient component located between the guiding member and the guiding member. The clamping device is attached to the driving member, and secures a product. The driving member and the clamping device deforms the resilient component in a first direction, and the resilient component biases the driving member and the clamping device in a second direction, that is opposite to the first direction.

Abstract: A drop test apparatus performs a drop test on a product. The drop test apparatus includes a drop control module and a support module. The drop control module includes a bottom plate and a support beam substantially perpendicularly attached to the bottom plate. The support module is attached at a predetermined height to the support beam and includes a lever for detecting whether the product is placed in a desired position. A support panel is disposed at a first end of the lever for supporting the product. A second end of the lever is under a predetermined force for maintaining the lever in a balanced state when the product is placed in the desired position.

Abstract: A drop test device for testing the strength of a product includes an operating platform and a hanging mechanism. The operating platform includes a bottom board, a pillar substantially perpendicularly connected to the bottom board and a support member rotatably secured on the pillar. The hanging mechanism is mounted to the pillar, and includes a clamp member for positioning the product. The product is sandwiched by the clamp member so an arris of the product abuts the support member. The support plate is rotated away from the product, so the product can be disengaged from the clamp member and dropped towards the bottom board.