Velleman K7101 User manual

K7101

H7101IP-1

With thisdevicewires can be very

easilycheckedformainsvoltage.

MAINS VOLTAGE DETECTOR

VELLEMAN NV

Legen Heirweg 33

9890 Gavere

Belgium Europe

www.velleman.be

www.velleman-kit.com

With this kit one can easily determine whether a wire is live or not. This kit can be used to detect wiring within walls or breaks

in cabling. A flashing LED shows whether a current is detected, while the speed at which the LED flashes indicates how

close one is to the wiring. For those wanting an audible signal, space is provided on the print for connecting a buzzer type

SV4/12. The small PCB has been specially designed to be incorporated into the separately available casing type G407.

TECHNICAL SPECIFICATIONS

Detection of phase conductor

LED indicator (buzzer as option)

Adjustable detection range (10cm max.)

Range indication

Supply: 9V battery

Dimensions: 56x64mm

Features & Specifications

Assembly hints

1. Assembly (Skipping this can lead to troubles ! )

Ok, so we have your attention. These hints will help you to make this project successful. Read them carefully.

1.1 Make sure you have the right tools:

 A good quality soldering iron (25-40W) with a small tip.

 Wipe it often on a wet sponge or cloth, to keep it clean; then apply solder to the tip, to give it a wet look. This is called ‘thinning’ and will

protect the tip, and enables you to make good connections. When solder rolls off the tip, it needs cleaning.

 Thin raisin-core solder. Do not use any flux or grease.

 A diagonal cutter to trim excess wires. To avoid injury when cutting excess leads, hold the lead so they

cannot fly towards the eyes.

 Needle nose pliers, for bending leads, or to hold components in place.

 Small blade and Phillips screwdrivers. A basic range is fine.

For some projects, a basic multi-meter is required, or might be handy

1.2 Assembly Hints :

Make sure the skill level matches your experience, to avoid disappointments.

Follow the instructions carefully. Read and understand the entire step before you perform each operation.

Perform the assembly in the correct order as stated in this manual

Position all parts on the PCB (Printed Circuit Board) as shown on the drawings.

Values on the circuit diagram are subject to changes.

Values in this assembly guide are correct*

Use the check-boxes to mark your progress.

Please read the included information on safety and customer service

* Typographical inaccuracies excluded. Always look for possible last minute manual updates, indicated as ‘NOTE’ on a separate leaflet.

R1 : 4M7 (4 - 7 - 5 - B)

R2 : 4M7 (4 - 7 - 5 - B)

R3 : 8K2 (8 - 2 - 2 - B)

R4 : 47K (4 - 7 - 3 - B)

R5 : 470 (4 - 7 - 1 - B)

R6 : 3K3 (3 - 3 - 2 - B)

R7 : 330 (3 - 3 - 1 - B)

R8 : 330 (3 - 3 - 1 - B)

R9 : 27K (2 - 7 - 3 - B)

R10 : 330K (3 - 3 - 4 - B)

R11 : 1M5 (1 - 5 - 5 - B)

R12 : 4M7 (4 - 7 - 5 - B)

R13 : 1K (1 - 0 - 2 -B)

R14 : 10K (1 - 0 -3 - B)

1. Resistors

R...

Construction

C1 : 10nF (103)

C2 : 10nF (103)

C3 : 10nF (103)

c...

3. Capacitors

ZD1 : 3V9

2. Zenerdiode. Watch the

polarity !

CATHODE

ZD...



C4 : 10µF



C5 : 33µF

4. Electrolytic Capacitors.

Watch the polarity !

C...

T1 : BC547

T2 : BC547

T3 : BC547

T4 : BC547

T5 : BC557

5. Transistors

Assembly hints

1.3 Soldering Hints :

1- Mount the component against the PCB surface and carefully solder the leads

2- Make sure the solder joints are cone-shaped and shiny

3- Trim excess leads as close as possible to the solder joint

REMOVE THEM FROM THE TAPE ONE AT A TIME !

DO NOT BLINDLY FOLLOW THE ORDER OF THE

COMPONENTS ONTO THE TAPE. ALWAYS CHECK

THEIR VALUE ON THE PARTS LIST!

Construction

RV1 : 470

7. Trim potentiometer

RV1

SW1 : 1p

8. Push button

LD1 : 5mm red

6. LED. Watch the polarity!

17mm

Connect a 9V battery to the holder.

Stand at a location which is certain to have no mains cabling in the vicinity.

Turn the RV1 potentiometer completely to the left (counterclockwise).

Push on the button. Normally the LED should briefly light up.

Adjust RV1 so that the LED is just about dimmed.

The circuit is now adjusted and in its most sensitive position. If one wishes to decrease the circuit's sensitivity, one must turn

the potentiometer back to the left. The small PCB can be incorporated into the casing type B2646. However, one must then

provide an opening in the covering for the push-button and the LED (see fig.1.0).

Anchor the PCB using two self tapping screws. Finally, cover the push-button with the cap provided.

9. TESTING AND TUNING

fig. 1.0

Testing and tuning

Diagram

10. DIAGRAM

11. PCB

PCB

Table of contents

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