Capacitors
——————————————————————————————–
C1………………………. 10uF-16v electrolytic
C2, C3 ……………………….18pF ceramic
C4, C5, C7, C8, C9, C14 ……………………..….100nF (or Code 104) ceramic
C18, C20, C21, C23, C26 ……………………….100nF (or Code 104) ceramic
C6, C12 ……………………….100uF-16v (or Code 107) Tantalum
C10 ……………………….5pF (or 4.7 pF) ceramic-high quality
C11………………………. 2.2uF-16v (or Code 225) Tantalum
C13, C17, C25 ……………………….470uF-16v electrolytic
C15, C16 ……………………….4700uF-16v electrolytic
C19, C22 ……………………….1000uF-16v electrolytic
C24 ……………………….2200uF-25v electrolytic
* Ceramic capacitors voltage isn’t important.
*you can Use a capacitor with higher voltage but don’t use capacitors with lower
voltage at all.
Resistors
——————————————————————————————-
R1, R17, R21 ……………………….1K
R2, R16 ……………………….47 ohm
R3 ……………………….10K
R4, R14, R20 ……………………….4.7K
R5, R18………………………. 2.2K
R6, R15………………………. 10 ohm
R7 ……………………….1.5K
R8 ……………………….1.8K
R9 ……………………….1M (one mega-ohms)
R10………………………. 100 ohm
R11, R12 ……………………….390 ohm – 2W
R13………………………. 18K
R19………………………. 22K
* All 0.25w1% carbon film except R11 and R12 (these are 2w and 1% metal film
or better)
Transistors
———————————————————————————————–
T1…………………… BS170 original
T2 ……. .…………….IRF840 or STW11NK100Z (MOSFET)
T3 ……………………BC337
Iintegrated Circuits
———————————————————————————————–
U1……………. ATmega328P-PU (microcontroller) Type 28 pin
U2……………. . LF357N, not fake (LF357H metal, LF157, LF257)
U3……………. . L7805CV, high quality of 5V regulator
U4……………. . L7812CV12 volts 1.5 A, high-quality regulator + small and strong
Other parts
———————————————————————————————–
X………… 20MHz crystal 20 MHz (20.000 or 20.0000 or 20.000000)
D1, D2 ……………………………….1N4148 diode
D3 ……………………………………1N5819 diode
LCD……………………………… 16*2 character LCD with backlit
SP……………………………… small 8 ohm speaker, 0.2 W or more piezoelectric speaker
or headphones.
BAT……………………………………. . Battery 18 to 24 V, 2-4 amps
LOOP…………………………………. . 350uH – 1 ohm – Spider-loop search (proposed)
S ………………………………. .5 high quality push button mounted box (normal cut and pressed mode Contact)
PCB……………………………… 7.3 x 7.9 cm fiber – rather than fiberglass
