简单的晶体测试仪电路图,Simple Crystal Tes

接线图 2023年09月28日 11:05 176 admin

简单的晶体测试仪电路图,Simple CrySTal Tester

简单的晶体测试仪电路图,Simple Crystal Tes 第1张

1N4148 pdf :http://www.jiexiantu.com/soft/39/2008/200810089784.html

Description

--------------------------------------------------------------------------------

Transistor Q1, a 2N3563, and its asSoCiated components form an oscillator circuit that will oscillate if, and only if, a good crystal is connected to the test clips. The output from the oscillator is then rectified by the 1N4148 signal diode and filtered by C3, a 100pF capacitor. The positive voltage developed across the capacitor is applied to the base of Q2, another 2N3563, causing it to conduct. When that happens, current flows through Led1, causing it to glow. Since only a good crystal will oscillate, a glowing LED indicates that the crystal is indeed OK. You can use the NTE123AP, PN100, or the 2N3904, for the transistors, however, the circuit works better with the 2N3563's for crystals in the higher MHz. The NTE108 is a direct replacement for the 2N3563. R3, the 330 ohm resistor for the Led, can be lowered to 220/270 ohm if your application is for crystals in the high MHz, which makes the led glow dimly in some instances. The circuit is powered by a standard 9-volt battery and the SPST push button power-switch is included to prolong battery life but not really needed if you use a socket for the crystal-under-test. I'm using this particular simle tester myself.

Parts List:
R1 = 100K C1,C2 = 220pF
R2 = 2K2 C3 = 100pF
R3 = 330 Ohm C4 = 0.1uF (100 nF)
Q1,Q2 = 2N3563 D2 = red led, ultra-bright
D1 = 1N4148 S1 = Momentary Push-button, SPST (optional)
MiscelLANeous: crocodile clips (or others), 9V battery clip, wire, solder, etc

版权与免责声明

本网转载并注明自其它出处的作品，目的在于传递更多信息，并不代表本网赞同其观点或证实其内容的真实性，不承担此类作品侵权行为的直接责任及连带责任。其他媒体、网站或个人从本网转载时，必须保留本网注明的作品出处，并自负版权等法律责任。

如涉及作品内容、版权等问题，请在作品发表之日起一周内与本网联系，否则视为放弃相关权利。

标签：测试仪