Problem: Article: One round of bleeding the slave cylinder is complete when your friend lifts their foot off of the clutch pedal.  With the bleed valve closed and your friend’s foot off of the pedal, open the brake fluid reservoir on the master cylinder and add brake fluid to it to ensure it doesn’t run dry as you go.  Bleeding the slave cylinder with an empty reservoir will suck air into the system again. Check the reservoir regularly to ensure it does not run out of fluid. As your friend presses on the clutch pedal, look at the clear hose so you can see any debris or air bubbles that drain with the fluid.  Air bubbles may look like bubbles, or they may look like gaps in the fluid as it passes through the hose.  When there are no air bubbles for a few round of bleeding, you are finished.  Air bubbles in the system can lead to your clutch system only delivering intermittent pressure. Intermittent pressure in the clutch system can cause the clutch to fail to disengage. Do as many rounds of bleeding the clutch as necessary for the bubbles to stop coming out of the hose.  If bubbles continue to appear no matter how much you bleed the system, there may be a leak somewhere in the lines or at the master cylinder.  Once the bubbles stop coming you can seal the bleed screw and place the cap back on the reservoir. If there is a leak somewhere in the system, you will need to seek a professional to identify and repair it.
Summary: Add more brake fluid between each round of bleeding. Look for air bubbles in the hose as it drains. Repeat the process as needed.

Problem: Article: A step-down transformer is a small electrical device that has wires with differing numbers of coils to lower the voltage from a supply to the output. For a simple converter circuit, look for a transformer that’s rated for at least 13 V so you can drop the input power lower. Place the transformer on a piece of perfboard, which has a grid of holes drilled into it and is used for prototyping circuits. Connect the transformer to the perfboard using nuts and bolts to secure it in place.  You can buy transformers and perfboard from an electronics supply store or online. If you want to raise the voltage, then you can use a step-up transformer instead. Diodes allow electricity to go through them in 1 direction, but they block the current from going the other way. Place the first diode at a 45-degree angle so the positive end points away from you and to the left. Place another diode next to the first one so they form a corner and the negative end points at a 45-degree angle to the right. Form the top of the diamond so the diode on the left has the negative side pointing up and the diode on the right has the positive side pointing up.  The diamond pattern of the diodes is known as a bridge rectifier and allows the circuit to transfer the positive and negative outputs of the AC signal. You can buy diodes from an electronics supply store or online. Make sure the diodes are pointing in the right directions or else the current won’t be able to flow through them. You can use hot glue to secure the diodes to the perfboard if you want, but it’s not required. Choose copper wires with differently colored insulation for the lines that the DC signal runs through. Wrap the end of 1 wire around the left corner of the diamond so it goes around both of the diode leads. Then attach the second wire to the diode leads at the right corner of the rectifier so it’s secure. Guide the wires toward the right side of the perfboard so they’re away from the transformer.The leads connected to the left and right carry the DC signal away from the rectifier. Turn your multimeter so the dial points at the “DCV” or “V–” option. Plug the leads into your multimeter and hold the pins against the positive and negative sides of the capacitor filter. The reading on the display will be the DC voltage converted from the original AC supply.You can also attach a DC-powered lightbulb to the wires on your capacitor filter to see if it lights up. If the light stays on consistently, then the converter worked.
Summary: Attach a step-down transformer to the left side of a perfboard. Arrange 4 diodes in a diamond shape to the right of the transformer. Wrap wires around the left and right of the diamond. Use a multimeter to check the DC voltage on the wires.

Problem: Article: Rest your hands on you rib cage so that you pinky touches your torso and your thumb faces up. Keeping your other fingers clenched, raise your thumb so it points up and parallel to your body. " Generally, you will be putting the tip of your middle finger on the middle joint of your thumb. Your goal is to make the circle with your index finger while your thumb forms the straight line. Your middle finger should be parallel with your thumb. The "L" will appear to come up from behind the "B." " Curl your ring finger so that the tip is level with your middle finger's first joint. One side of the "O" will be your curled ring finger, the other will be your straight middle finger. You do not need your pinky to make the symbol, so tuck it out of the way however it that feels comfortable.
Summary: Clench your hands into a fist. Point your thumb up towards your head. Curl your index finger against the thumb to make a lowercase "b. Raise your middle finger towards your head to make the "L". Form the first "O" using your ring finger and the line of the "L. Tuck your pinky behind the other fingers.

Problem: Article: Older incandescent light bulbs do not contain liquid mercury.  But, some newer energy-saving compact fluorescent light (CFL) bulbs do.  Check the packaging that the bulbs came in for warnings regarding their mercury content.  Energy-saving bulbs typically contain no more than 4 mg of mercury—just enough to cover the tip of a pen. Even if the CFL bulb contains mercury, it might be in gaseous rather than liquid form. LED bulbs don’t contain liquid mercury. Tilt switches (sometimes called “mercury switches”) were used in older appliances to transmit an on/off signal.  Appliances in the home that may contain mercury include chest freezers, televisions, thermostats, washing machines, space heaters, clothes dryers, and washing machines.  Contact the appliance manufacturer or check your user manual to confirm if a given appliance has mercury. Contact an appliance recycler or your local hazardous waste collection center for information regarding the best way to dispose of these appliances. You might be able to locate up to 3 grams of mercury in thermostats. Most normal batteries do not contain mercury.  However, the smaller “button cell” batteries that are used in watches, hearing aids, toys, pacemakers, and other devices still contain mercury.  If you can find a device containing these small batteries, you’ve probably found liquid mercury. Certain pharmaceutical products might contain liquid mercury.  Skin antiseptics, facial creams, contact lens solutions, and some vaccines could contain liquid mercury.  To confirm that your pharmaceutical products contain liquid mercury, check the ingredients label or contact the manufacturer. Clocks from the 1600s or before often used liquid mercury as a pendulum weight.  If you own such a clock, it probably contains liquid mercury.
Summary:
Identify compact fluorescent light bulbs. Locate mercury in tilt switches. Find mercury in small batteries. Search for mercury in pharmaceuticals. Check antique clocks.