Many apprentices you want to "fix hardware devices" such as ATX power supplies, CRT monitors, LCD, printers, motherboards, laptop ... but do not know anything about electronics??? This explains from, because the hardware device ultimately it is just "electronic device" that want to edit, then we must start with "basic electronics". The articles listed below have been collecting parts from some other site I http://hocnghe.com.vn compilation for easier to understand. Hope it will help you step into a new career conditional access. Click on the links below to see each post. 1. 1 DC current . 2. electromagnetic field . 3. alternating current AC . 4. use VOM meter needle . 5. watches Use Digital numeric measure . 6. Resistance . 7. Capacitors . 8. coil . 9. diode . 10. Transistor . 11. Mosfet - field-effect transistors (Metal Oxide Semiconductor Field Effect Transistor) 12. Thyristor . 13th. Amplifier circuit . 14. audio amplifier circuit using BJT transistor . 15th. rectifier and voltage regulator circuit . 16th. oscillating circuit .