Crystal activity tester

Test - lowercase jpg
Kaixin micro test
Test probe P100-M3
Crystal activity tester
This circuit will check the crystal. The two parts of the 7400 are used as an oscillator whose output is modified and then drives an NPN transistor, which is an LED (Figure A) switch. In Figure B, the LED is replaced by a meter.


65inch Horizontal Query Machine Integrated

LCD Capacititve Touch Query All-in-one Screen

1,Self-service query terminals;
2,Custom contents for users;
3,Information inquires;
4,Guidance system;
5,Products display showcase;
6,Metal frames not easy to damage;
7,Indoor outdoor both avaiable;
8,Multiple sizes satisfy different needs;
9,Capacitive touch lcd screen,smart operation;
10,4+64G,X86 i3 intelcore CPU;

Lcd Touch Screen Query Integrated Machine,Lcd Capacitive Touch Screen Display Monitor,Lcd Touch Screen Promotion Display Monitor,All-In-One Query Machine Promotion Equipment

Jumei Video(Shenzhen)Co.,Ltd , https://www.jmsxdisplay.com