High Costs: Capacitor makers face cost challenges due to supply shortages and rising power prices, impacting both film and aluminum capacitors. Employers are paying for costly benefits that employees don't find useful.
The capacitor value in the design for touch sensing applications depends on the presence of the user finger and the sensor design. This application note introduces various sensor designs and recommendations to achieve optimum performances, ensuring that none of the sensor elements interfere with each other.
Capacitors are rated in tiny fractions of a Farad, such as pF (micro) and pF (pico). Capacitors are not rated in Farads directly due to their small capacitance values.
The value of capacitors can be determined by several ways depending up on the type of capacitor like electrolytic, disc, film capacitors, etc. These methods include value or number printed on the body of the capacitor or color coding of the capacitor.
Those capacitors having capacitance of 1000pf or more, their values can be read by the 3 digits numbers (e.g. 102. 103, 105 etc.) printed on it. These 3 digits color coding can be read as follows. Generally, the overall rating is written and printed on these capacitors. For example The fig 2 (a) The value of capacitance is 47 μF (microfarad).
Aluminum Electrolytic Capacitors: These are polarized capacitors with an anode electrode (+) constructed of pure aluminum foil with an etched surface. Film Capacitors: These capacitors use a thin plastic film as the dielectric. They are generally known for being inexpensive, stable over time, and having low self-inductance.