Tehnik Service

FM Beacon Broadcast Transmitter (88-108 MHz)

FM Transmitter 0.8W

L1 = 6 menet 5 mm-re, 0,5 CuZ
L2 = 6 menet 5 mm-re, 0,5 CuZ
L3 = 2 menet 5 mm-re, 0,5 CuZ (L2-vel közös testen, ferritmaggal)
L4 = 5 menet 7 mm-re, 0,4 CuZ
L5 = 4 menet 7 mm-re, 0,4 CuZ
Source: Link

Part list:
C1, C2, C12 – 100 pF
C3, C5 – 0,22 uF (elektrolit)
C4 – 1,8 nF
C6 – 4,7 uF (elektrolit)
C7, C13, C16, C17, C19 – 1 nF
C8 – 20 pF
C9 – 33 pF
C10 – 47 pF
C11 – 22 pF
C14 – 60 pF trimmer
C15 – 35 pF trimmer
C18 [...]

AVR ISP Programmer

Source: Rototron

USB AVR ISP Programmer

Parts List:

Description
QTY

Atmel ATMEGA8-16PI
1

74HC126N Quad Buffer
1

12 MHz Crystal HC49/US
1

28 pin IC socket
1

14 pin IC socket (optional)
1

Resistor Carbon Film 68 Ohm 1/4 Watt 10%
2

Resistor Carbon Film 270 Ohm 1/4 Watt 10%
1

Resistor Carbon Film 1K Ohm 1/4 Watt 10%
2

Resistor Carbon Film 10K Ohm 1/4 Watt 10%
5

Resistor Carbon Film 2K2 Ohm 1/4 Watt 10%
1

Resistor Carbon Film 22K Ohm [...]

Power Supply 0 – 24V 5A

DVM – Digital Led Volt Meter

Parts:
R1 = 8K2
R2 = 47K / 470K
R3 = 100K
R4 = 2K
R5, R6 = 47K
R7 = 0R / 4K7
R8 = 560R
C1,C5, C6, C8, C9 = 100n
C2 = 470n / 47n
C3 = 220n
C4 = 100p
C7 = 10-22u
D1, D2 = 1N4148
IC1 = ICL7107
IC2 = [...]

2 X 60W Amplifier

125W Amplifier

10 Channel Chaser for 12V/60W lamps with PIC16F628A

This project allows instant start sequentially but a dozen low-voltage lamps 12 V / 60 W, and makes them fade and always sequentially (but slower). This system has been designed to meet the demand of a visitor who wanted ten recessed low voltage spot in a driveway to his house, with the following function: – [...]

Battery Level Indicator

This circuit allows switching on a LED when the battery voltage (12V) drops below a certain threshold. The operating system is based on a comparison of tension, which comes in a zener diode. If the supply voltage is 12V and the zener diode is a 10V model (this is the case in the diagram), we [...]

Timer from 1 to 999s with PIC16F84A

This is a good looking and practical device that can be useful in many areas where countdown timer is needed. This project is based on the PIC16F84A microcontroller. The time range can be adjusted between 1 and 999 seconds. This project has 3 buttons and one of them is named Set Button. In order to [...]

8 LED VU Meter Project

A VU meter is often included in audio equipment to display a signal level in Volume Units; the device is sometimes also called volume indicator (VI). In this project we are building a basic and low cost LED VU Metre circuit . The extent (range) display is -18 dBu to +3 dBu, spread over [...]

12 Channel LED Chaser with PIC16F84A

Today we have a new category “Projects” and a new electronic project 12 Channel LED Chaser with PIC16F84A.
This project is based on the popular PIC16f84A micro-controller.The heart of this project LED chaser is the PIC16F84A PIC microcontroller.A 4MHz crystal and capacitors C1 and C2 22pf is used for providing clock pulses to the micro-controller. The [...]

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Tehnik Service blog launched in 2007. This blog is built for educational purpose to help you to be informed about all the news come from around the world in the field of electronics.