20 MHz Crystal Oscillator. Crystal oscillators are oscillators where the primary frequency determining element is a quartz crystal. Because of the inherent characteristics of the quartz crystal the crystal oscillator may be held to extreme accuracy of frequency stability. Temperature compensation may be applied to crystal oscillators to improve thermal stability of the crystal oscillator. Crystal oscillators are usually, fixed frequency oscillators where stability and accuracy are the primary considerations. For example it is almost impossible to design a stable and accurate LC oscillator for the upper HF and higher frequencies without resorting to some sort of crystal control. Hence the reason for crystal oscillators.

12 MHz Crystal Oscillator. Crystal oscillators are oscillators where the primary frequency determining element is a quartz crystal. Because of the inherent characteristics of the quartz crystal the crystal oscillator may be held to extreme accuracy of frequency stability. Temperature compensation may be applied to crystal oscillators to improve thermal stability of the crystal oscillator. Crystal oscillators are usually, fixed frequency oscillators where stability and accuracy are the primary considerations. For example it is almost impossible to design a stable and accurate LC oscillator for the upper HF and higher frequencies without resorting to some sort of crystal control. Hence the reason for crystal oscillators.

Frequency:11.059MHz Frequency Stability:±30ppm Frequency Tolerance:±30ppm Load Capacitance:18pF ESR (Equivalent Series Resistance):50 Ohms Operating Mode:Fundamental Operating Temperature:-20°C ~ 70°C

A crystal oscillator is an electronic oscillator circuit that uses the mechanical resonance of a vibrating crystal of piezoelectric material to create an electrical signal with a precise frequency.[1][2][3] This frequency is often used to keep track of time, as in quartz wristwatches, to provide a stable clock signal for digital integrated circuits, and to stabilize frequencies for radio transmitters and receivers. The most common type of piezoelectric resonator used is the quartz crystal, so oscillator circuits incorporating them became known as crystal oscillators,[1] but other piezoelectric materials including polycrystalline ceramics are used in similar circuits. A crystal oscillator, particularly one made of quartz crystal, works by being distorted by an electric field when voltage is applied to an electrode near or on the crystal. This property is known as electrostriction or inverse piezoelectricity. When the field is removed, the quartz - which oscillates in a precise frequency - generates an electric field as it returns to its previous shape, and this can generate a voltage. The result is that a quartz crystal behaves like an RLC circuit. Quartz crystals are manufactured for frequencies from a few tens of kilohertz to hundreds of megahertz. More than two billion crystals are manufactured annually[citation needed]. Most are used for consumer devices such as wristwatches, clocks, radios, computers, and cellphones. Quartz crystals are also found inside test and measurement equipment, such as counters, signal generators, and oscilloscopes.

It has 16 pins and the functionality of each pin is explained as follows: Pin-1: It is the output 5. It goes high when the counter reads 5 counts. Pin-2: It is the output 1. It goes high when the counter reads 0 counts. Pin-3: It is the output 0. It goes high when the counter reads 0 counts. Pin-4: It is the output 2. It goes high when the counter reads 2 counts. Pin-5: It is the output 6. It goes high when the counter reads 6 counts. Pin-6: It is the output 7. It goes high when the counter reads 7 counts. Pin-7: It is the output 3. It goes high when the counter reads 3 counts. Pin-8: It is the Ground pin which should be connected to a LOW voltage (0V). Pin-9: It is the output 8. It goes high when the counter reads 8 counts. Pin-10: It is the output 4. It goes high when the counter reads 4 counts. Pin-11: It is the output 9. It goes high when the counter reads 9 counts. Pin-12: This is divided by 10 output which is used to cascade the IC with another counter so as to enable counting greater than the range supported by a single IC 4017. By cascading with another 4017 IC, we can count up to 20 numbers. We can increase and increase the range of counting by cascading it with more and more IC 4017s. Each additional cascaded IC will increase the counting range by 10. However, it is not advisable to cascade more than 3 ICs as it may reduce the reliability of the count due to the occurrence glitches. If you need a counting range more than twenty or thirty, I advise you to go with conventional procedure of using a binary counter followed by a corresponding decoder. Pin-13: This pin is the disable pin. In normal mode of operation, this is connected to ground or logic LOW voltage. If this pin is connected to logic HIGH voltage, then the circuit will stop receiving pulses and so it will not advance the count irrespective of number of pulses received from the clock. Pin-14: This pin is the clock input. This is the pin from where we need to give the input clock pulses to the IC in order to advance the count. The count advances on the rising edge of the clock. Pin-15: This is the reset pin which should be kept LOW for normal operation. If you need to reset the IC, then you can connect this pin to HIGH voltage. Pin-16: This is the power supply (Vcc) pin. This should be given a HIGH voltage of 3V to 15V for the IC to function.

Features Extremely Low vF Low Power Loss/High Efficiency Low Stored Charge, Majority Carrier Conduction Mechanical Characteristics: Case: Epoxy, Molded Weight: 1.1 gram (approximately) Finish: All External Surfaces Corrosion Resistant and Terminal Leads are Readily Solderable Lead Temperature for Soldering Purposes: 260 °C Max. for 10 Seconds Shipped in plastic bags, 5,000 per bag Available Tape and Reeled, 1500 per reel, by adding a "RL'' suffix to the part number Polarity: Cathode indicated by Polarity Band

<ul class="a-unordered-list a-vertical a-spacing-none" style="margin-right: 0px; margin-bottom: 0px; margin-left: 18px; color: rgb(148, 148, 148); padding: 0px; font-family: &quot;Amazon Ember&quot;, Arial, sans-serif;"><li style="list-style: disc; overflow-wrap: break-word; margin: 0px;"><span class="a-list-item" style="color: rgb(17, 17, 17);">Product Name: LED Digital Display Tube; Type: Common Anode; Model: 3161BS</span></li><li style="list-style: disc; overflow-wrap: break-word; margin: 0px;"><span class="a-list-item" style="color: rgb(17, 17, 17);">Common Anode: 1-6; Digital Display: 1 Digit; Digital Number: 1 Bit 7 Segment; Emitted Color: Red</span></li><li style="list-style: disc; overflow-wrap: break-word; margin: 0px;"><span class="a-list-item" style="color: rgb(17, 17, 17);">Pin Number: 10; Continuous Forward Current: 20mA; Average Forward Voltage: 2V; Power Consumption: 36mW</span></li><li style="list-style: disc; overflow-wrap: break-word; margin: 0px;"><span class="a-list-item" style="color: rgb(17, 17, 17);">Luminous Intensity: 11mcd; Number Height: 0.35 inch; Panel Size: 14 x 7.5 x 8.5mm / 0.55" x 0.3" x 0.33" (L*W*H); Total Size: 14 x 7.5 x 14mm / 0.55" x 0.3" x 0.55" (L*W*H)</span></li><li style="list-style: disc; overflow-wrap: break-word; margin: 0px;"><span class="a-list-item" style="color: rgb(17, 17, 17);">Material: Plastic, Metal; Color: Black, White</span></li></ul>

<p><span style="color: rgb(0, 0, 0); font-family: &quot;Open Sans&quot;, Arial, Helvetica, sans-serif, SimSun, 宋体;">1. onboard TTP224 capacitive touch sensor IC 4 keys</span><br style="box-sizing: content-box; color: rgb(0, 0, 0); font-family: &quot;Open Sans&quot;, Arial, Helvetica, sans-serif, SimSun, 宋体;"><span style="color: rgb(0, 0, 0); font-family: &quot;Open Sans&quot;, Arial, Helvetica, sans-serif, SimSun, 宋体;">2, 4 board-level status indicator</span><br style="box-sizing: content-box; color: rgb(0, 0, 0); font-family: &quot;Open Sans&quot;, Arial, Helvetica, sans-serif, SimSun, 宋体;"><span style="color: rgb(0, 0, 0); font-family: &quot;Open Sans&quot;, Arial, Helvetica, sans-serif, SimSun, 宋体;">3, working voltage: 2.4V-5.5V</span><br style="box-sizing: content-box; color: rgb(0, 0, 0); font-family: &quot;Open Sans&quot;, Arial, Helvetica, sans-serif, SimSun, 宋体;"><span style="color: rgb(0, 0, 0); font-family: &quot;Open Sans&quot;, Arial, Helvetica, sans-serif, SimSun, 宋体;">4, the module can set the output mode, the key output mode, the maximum output time and fast / low power selection</span><br style="box-sizing: content-box; color: rgb(0, 0, 0); font-family: &quot;Open Sans&quot;, Arial, Helvetica, sans-serif, SimSun, 宋体;"><span style="color: rgb(0, 0, 0); font-family: &quot;Open Sans&quot;, Arial, Helvetica, sans-serif, SimSun, 宋体;">5, PCB board size: 35 (mm) x29 (mm)</span></p>

<p>This box contains total 100 pieces of ceramic capacitors. There are 5 pieces in each of the following 20 values:</p><p>2pf, 10pf, 15pf, 22pf, 33pf, 47pf, 68pf, 82pf, 100pf, 220pf, 330pf, 470pf, 820pf, 1nf, 1.5nf, 2.2nf, 3.nf, 4.7nf, 10nf and 100nf&nbsp;</p>