DC to DC voltage booster

Simple radio receiver

Radiowave detector circuit

crystal radio

1N34A, 1N60, 1N91, 1N119, 1N270, 1N277, 1N283

Something need to know

1. AC/Alternating Current - pulse back and forth just like radio wave and sound wave
2. Test whether transistor is faulty
3. Test the amount of electromagnetic field produce within tesla coil
4. The amount of power required to power tesla coil
5. The number of turns and diameter and the wire size to determine how much power required.
6. Direction of turn
7. Why after a few times on off the tesla coil dies and won't work anymore

Mosfet

FS3KM 18A0880



Transistor 13003 TRA2

Important electronic component to learn

The most basic important electronic component to understand

1. Capacitor
2. Transistor
3. Diode
4. Resistor
5. Transformer
6. Relay
7. Integrated circuit IC (LM2577)

Things to understand about them

1. It's electric current input and output behavior
2. Connection from source and output terminal

Behavior

1. Store charges
2. Amplify electric current

Transistors

1. Transistors

The first two is good for radio signal circuit

S9018 / H331 = NPN transistors
Collector current = 50 mA



C3355 = NPN (2SC3355 HIGH FREQUENCY LOW NOISE AMPLIFIER NPN)
Collector current = 100 mA



C945 = NPN Transistor
Collector current = 150 mA



2N222A vs SC1815 fact sheet

SC1815 can produce amplify almost the same amount from the source

Joule Thief diagram

Simple radio signal detector using LED, germanium diode and copper

Fujitsu 21 Inch monitor open faulty component parts

Tire pressure gauge meter opened electronic component inside

Make mini drills and sanders from scrap