R1-15-16-21-22-17-18=1Kohm R33=68ohm 5W Q1-2=BC550C
R2=47Kohm [...]

Download complet project – ESR meter in pdf format

Parts:
Ic1 – 78L05
T1,T3 – bc547 npn
T2,T4 – bc557 pnp
D1,D2 – 1n4148
D3 – zener 13v
D4 – zener 12v
D5,D6 – zener 5v1
R1 – 1k2
R10- 270
R15- 1k
R7,R8 – 10k
R4,R5,R13,R14 – 1k8
R2,R3,R6,R9,R11,R12-5k6
c1,c2,c3 – 100nF
c4-10uF/16v
c5-100uF/25v
Led1 – red 5mm led
Led2 – green 5mm led
2×8pin,18pin,28pin i 40pin
Db9 zenski konektor za montazu na pcb
jp1 – 1×2 jumper
jp2 – 1×3 jumper
con1- 1×5 (in-circuit [...]

Parts:
R1 = 1K
C1 = 1uF/35V
R2 = 3,3K
C2 = 470pF
R3 = 100
C3 = 100uF/60V
R4 = 330
C4 = 100uF/60V
R5 = 3,3K
C5 = 10uF/60V
R6 = 1K
C6 = 47uF/60V
R7 = 0,33
C7 = 8,2pF
R8 = 33?
C8 = 0,1uF
R9 = 4,7
C9 = 1uF/35V
R10 = 1?
C10 = 470pF
R11 = 3,3?
C11 = 100uF/60V
R12 = 100
C12 = 100uF/60V
R13 = 330
C13 = 10uF/60V
R14 = 3,3?
C14 [...]

C1 ——-1 0.0047uf Mono Capacitor
C2 ——-1 0.1uf Disc Capacitor
D1, D2 —2 1N4007 Diode
FTB —–1 Filtered Blacklight Tube
IC1 ——1 [...]

General Description
This is a small but quite powerful FM transmitter having three RF stages incorporating an audio preamplifier for better modulation. t has an output power of 4 Watts and works off 12-18 VDC which makes it easily portable. It is the ideal project for the beginner who wishes to get started in the fascinating [...]

This is circuit Regulator 5V 3A by IC LA5105. (easy circuit)
To use transformer 4A. IC to Hold Heatsink.
For Digital circuit.

This is a simple XTal tester circuit. T1 and XTal have formed an oscillator. C1 and C2 are voltage divider for oscillator. if the XTal is safe, the oscillator will work well and its output voltage will be rectified by C3, C4, D1 and D2, then T2 will run and LED will light. The circuit [...]

PCB Download
PIC Source program
PIC HEX file
The software of PIC was changed. A display pattern will be held once a switch is pushed.
SW1: To the left from the right. SW4: In the center from right and left.
SW2: To right and left from a center.
SW5: To the right from the left.
SW3: Round-trip
An initial value is SW3.

Note: The text is AUTO translated from Greek version
Many times we needed to strengthen a small signal in the region of VHF or FM, or it is we lead a body, or a receptor. The preamplifier that to you we propose offers 20dB in all the region of VHF and it still can reach also [...]