By Adrienne Emmanuel. Car Wiring. Publised at Thursday, December 28th 2017, 03:09:28 AM. Label wires before cutting them when working on a section of the loom. Before you disconnect anything, make absolutely sure you know how to put it back. Number both sides of each connection with labels made of masking tape. If necessary, make drawings of cable routes and how clips fit. Use a craft knife or razor blade to cut away the wrapping from the damaged section. Take care not to cut into the plastic cable insulation.
By Adrienne Emmanuel. Car Wiring. Published at Monday, January 08th 2018, 11:01:23 AM. Push the wire into the connector so that the strands just protrude from the round end. Grip the cable, connector uppermost, in a vice or self-locking pliers, so that the connector rests on top of the vice and cannot slide down the wire when soldering. Inside a bullet connector. Apply solder on the top of the connector, and let it melt and run down inside. Trim off the protruding strands with wire cutters.
By Fleurette Nina. Electrical Wiring. Published at Monday, January 08th 2018, 08:44:07 AM. This PCB, like almost all of my PCBs, is a four-layer board. In my opinion, it is not wise to restrict yourself to two layers unless you’re dealing with a very simple circuit or you really need to cut costs. The four-layer arrangement is beneficial in terms of routing and performance: routing, because via connections to internal planes almost completely eliminate power and ground traces; and performance, because the internal planes allow for low-resistance, low-inductance power and ground connections. The extra top-layer and bottom-layer real estate opened up by all the internal-plane connections come in very handy when you need to provide a generous copper area for improved thermal performance (for example, to make sure that your LDO or your motor driver doesn’t overheat and enter thermal shutdown).
By Dorian Yannic. Electrical Wiring. Published at Monday, January 08th 2018, 04:49:54 AM. The decoupling capacitors (C4, C5, C6, C7, C9, C10, C11) are arranged around the perimeter of the chip, very close to their respective power pins and to the vias that connect the caps to the internal planes. Notice how the smaller cap is always closer to the power pin; this is because we rely more on the lower-value capacitor for high-frequency bypassing, and thus the first priority is minimizing the inductance and resistance between the smaller cap and the pin.
By Mailys Laurent. Car Wiring. Published at Monday, January 08th 2018, 03:44:15 AM. Cable sizes are given by two numbers. The first one is the number of strands. The second (which is always the same in car wiring) is the diameter of each strand in millimetres. Twisting wires together and fitting spade terminals twist bare ends together and solder them.Cover the joint with insulating tape. Tag connectors are closedround the bare wire withpliers, then soldered. A spade terminal is easy to disconnect andreconnect. Methods of joining, wires To connect two wires, use a wire stripper to remove about in. (19 mm) of insulation from each wire.
By Claudine Nicolette. Motor Wiring. Published at Monday, January 08th 2018, 01:16:15 AM. The motor can be directly pulsed by the arduino. The arduino can also supply power to the motor, but normally this is only a good idea for demonstration purposes. The arduino has a very weak power supply, and attempting to power a motor through it can destroy the arduino. Furthermore, the arduino may not be able to supply the exact correct maximum voltage. For this reason, an ESC is placed between the arduino and the motor.
By Mailys Laurent. Motor Wiring. Published at Monday, January 08th 2018, 01:11:52 AM. One way to distinguish the center tap (common wire) from a coil-end wire is by measuring the resistance. Resistance between common wire and coil-end wire is always half of the resistance between coil-end wires. This is because there is twice the length of coil between the ends and only half from center (common wire) to the end. A quick way to determine if the stepper motor is working is to short circuit every two pairs and try turning the shaft. Whenever a higher than normal resistance is felt, it indicates that the circuit to the particular winding is closed and that the phase is working.
By Adrienne Emmanuel. Motor Wiring. Published at Monday, January 08th 2018, 00:31:27 AM. What is commonly referred to as microstepping is often sine–cosine microstepping in which the winding current approximates a sinusoidal AC waveform. Sine–cosine microstepping is the most common form, but other waveforms can be used. Regardless of the waveform used, as the microsteps become smaller, motor operation becomes more smooth, thereby greatly reducing resonance in any parts the motor may be connected to, as well as the motor itself. Resolution will be limited by the mechanical stiction, backlash, and other sources of error between the motor and the end device. Gear reducers may be used to increase resolution of positioning.
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