Monday Kids OTL-1 Power Amplifier Circuit DIY Kit High Sensitivity OTL Discrete Component Amplifier Suite for Exercise welding skills

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  • Brand Name: Monday Kids
  • Condition: New
  • Type: Logic ICs
  • Operating Temperature: none
  • Dissipation Power: none
  • is_customized: Yes
  • Model Number: OTL-1 Power Amplifier Circuit
  • Supply Voltage: DC 4V-9V(Recommend 5V)
  • Standby current: Less than 5mA
  • Output Type: Single power supply OTL
  • Output power: 1W(max)
  • PCB Size: 65*40mm

1.Description:

This is a kit parts. You should solder it by yourself.This circuit belongs to the OTL circuit teaching model, its maximum power is only 1W, driven by two complementary transistors S8550 and S8050.It can be used for exercise welding techniques, understanding the triode complementary OTL output type and how to adjust the static operating point, midpoint voltage, etc..

2.Features:

1>.High sensitivity;

2>.Low power;

3>.Wide operating voltage range;

4>.Low power consumption;

5>.DIY design;

3.Parameters :

No.

Parameter

Value

1

Model

OTL-1

2

Standby current

Less than 5mA

3

Soldering difficulty Level

Easy

4

Working voltage

DC 4V-9V(Recommend 5V)

5

Working current

Less than 100mA

6

Output power

1W(max)

7

Output Type

Single power supply OTL

6

PCB Size

65*40mm

4.Working principle:

1>.This circuit belongs to the OTL circuit teaching model, its maximum power is only 1W, driven by two complementary transistors S8550 and S8050;

2>.The working voltage of this kit is DC4-9V, the recommended voltage is 5V.

5.Instructions:

Step 1: Complete the installation in the normal way following installation manual and schematic.(Please request separately).

Step 2:Connect DC 4-9V voltage;

Step 3:Adjust potentiometers.

Step 4:Test and use.

6.Adjust static working point:

1>.Turn VR1,VR2,VR3 counter clockwise to the end.Turn on power supply,The red cable of the multimeter connect TP1,Black cable of multimeter connect to GND.Adjust potentiometer VR2 to make sure the voltage is half of the power supply at TP1.(For example:The power supply voltage is 8V,So the voltage ofthe TP1 should be adjusted to 4V by VR2).

2>.Connect the ammeter to the power supply circuit,Then you will get the static current of the circuit.At this time,please adjust potentiometer VR3 to increase the current value of the circuit to 0.5mA.

When you input the audio signal at this time, you can have sound output(It need connect speaker by yourself).

3>.Optimum working voltage DC4-9V,Maximum output power is 1 watts!

7.Using attention:

1>.Please make sure all components in right direction and right place.

2>.Please check whether pseudo/float welding.This is very important .

3>.The soldering iron can't touch the components for a long time, otherwise the components will be damaged because of the high temperature.

4>.It is recommended to use a stable power supply, otherwise it may interfere with the audio signal output.

8.Component list:

NO.

Component Name

PCB Marker

Parameter

Quantity

1

Metal Film Resistor

R4-R5

100ohm

2

2

Metal Film Resistor

R6

470ohm

1

3

Metal Film Resistor

R1-R2

1K

2

4

Metal Film Resistor

R3

4.7K

1

5

Metal Film Resistor

R7

10K

1

6

Ceramic Capacitor

C7

101P 100pF

1

7

Ceramic Capacitor

C2

104P 0.1uF

1

8

Electrolytic Capacitor

C3

2.2uF

1

9

Electrolytic Capacitor

C5-C6

100uF

2

10

Electrolytic Capacitor

C1,C4

220uF

2

11

Diode

D1

1N4148

1

12

Red LED

LED1

3mm

1

13

Transitor S8050

Q1,Q2

TO-92

2

14

Transitor S8550

Q3

TO-92

1

15

Potentiometer

VR3

100ohm

1

16

Potentiometer

VR2

20K

1

17

Potentiometer

VR1

10K

1

18

Switch

SW1

6*6mm

1

19

Terminal KF301-2P

CN1-CN2

3.08mm

2

20

Audio Socket

JK1

5Pins

1

21

Audio Cable

JK1

1 Meter

1

22

PCB

OTL-1

65*40mm

1

Note:Please request install manual and schematic for us;You can finish install by PCB silk screen and component listing.

9.Application:

1>.Electronic teaching

2>.Exercise welding skills

3>.Circuit application

10.Frequency asked questions:

1>.Why can't work?

Q :Please make sure all components in right direction and right place and check whether pseudo/float welding.This is very important.

11.Install tools you need preliminary preparation by yourself:

1>. Soldering iron;

2>. Multimeter;

3>. Solder wire;

4>. Iron stand;

5>. Diagonal cutting pliers;

6>. The screwdriver;

7>. Tweezers;

8>. Long nose pliers;

9>. Suction tin;

10>. Cleaning sponge;

11>. Screwdriver set.

  • Unit Type: piece
  • Package Weight: 0.05kg (0.11lb.)
  • Package Size: 1cm x 1cm x 1cm (0.39in x 0.39in x 0.39in)

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