4 CHANNELS INJECTOR TESTER

We will make a 4-channel injector tester for automotive use that is very easy to do.

GERBER PCB:

https://mega.nz/file/CZ4ETJLb#jAZOsbeZxXt_X4Sn2nI6BpgNkjMttmDuolDYLQ9TU9Y

DATASHEET NE556:

https://mega.nz/file/acoTnYjD#pXwDDd_hLUm-twnlFHqJgHDxsVkgruH5Xv2Wuv0ZYqU

IRFZ44N:

https://mega.nz/file/fAwiDYLS#UNOOqCOyt5zmwawDQFRIRwkQxRLPdb5z9bu6aGOrZQo

Like all my projects, I share the schematic diagram so that you can do it yourself. The schematic diagram was designed in EASYEDA, a very professional and free electronic circuit design software, we can observe the electronic components that we use for this project and their respective values.

Firstly the circuit is being fed with a DC voltage of 12V we are using some input protection diodes to avoid damaging the integrated NE556 the brain of this project

We are using 2 configurations. The first is an astable circuit that we can configure the speed by means of a potentiometer and we adjust it using a pwm circuit that allows me to control the pulse width at the output. We will obtain a regulated signal of 5v pulsating with speed variation and pwm, we can notice it with the led diode that we have on the same PCB

The 5VDC regulation is done by the 5.1v zener. We can control 4 automotive GDI injectors to see how it works and what state it is in. This project is for mechanical workshops to make it easier to detect problems or technical failures.

LM556 Integrated Circuit. Double timer. The NA556N is a precision timer that can be operated in astable mode and monostable mode with external resistor-capacitor (RC) time control. The basic moment provided by the RC time constant can be actively controlled by modulating the bias of the control input voltage. The trigger threshold levels and normally are 2/3 and 1/3°, respectively, of VCC. This level can be altered by using the control voltage terminal. When the trigger input falls below the trigger level the flip-flop will trigger and the output goes high. If the trigger input is above the trigger level and the input threshold is above the threshold level the flip-flop resets to zero and the output is low. The reset input can override all other inputs and can be used to start a new timing cycle. When reset goes low the flip-flop goes to zero and the output goes low. When the output is low, a low impedance path is provided between the discharge terminal and ground.

Characteristics:

Two 555 timers on one chip

Maximum Operating Frequency: 500 kHz typically

Timing from microseconds to hours

Can operate in monostable or astable mode

As a monostable, timing is precisely controlled by an external resistor and capacitor. As astable the frequency and duty cycle can be controlled by two external resistors and one capacitor.

The output can supply up to 150 mA in source mode or sink mode

adjustable duty cycle

TTL-compatible

Supply voltage: 4.5 V to 16 V

Encapsulation: PDIP 14 pin

Applications:

timers

pulse generation

clock circuits

Generation of time delays

pulse detectors

Burst Tone Generators

PWM Generators

frequency dividers

sequential synchronization

Among others

IRFZ44N MOSFET Channel N 55V - 49A TO-220, is designed to withstand a specific level of energy in avalanche breakdown operating mode.

These power MOSFETs are designed for applications such

such as switching regulators, switching converters, motor controllers, relay controllers and controllers for high power bipolar switching.

These transistors that require high speed and low power to drive the gate (Gate), can be operated directly from integrated circuits.

Main features:

Encapsulation Type: TO-220

Transistor equivalent to NTE2395, IRFZ44

N-Channel Mosfet Transistor

Drain-Source Voltage (VDSS): 55V

Drain-Gate Voltage (VDGR): 55V

Gate-Source Voltage (VGS): ± 20V

Drain current (ID): 49A

Pulsed Current in Drain (IDM): 160A

Driving Resistance (RDS): 0.022 Ω

Maximum Dissipated Power (PD): 110W

• 1 CI NE556 DIP
• 1 JACK DC
• 1 POTENCIOMETER 100K
• 1 POTENCIOMETER 250K
• 1 DB9 VGA
• 2 DIODES 1N5819
• 1 CAPACITOR ELECTROLITO 1000UF25V
• 1 CAPACITOR ELECTROLITO 1UF 25V
• 2 CAPACITOR 104
• 3 RESISTORS 1K 1/4W
• 2 RESISTORS 10K 1/4W
• 1 RESISTOR 15K 1/4W
• 1 RESISTOR 100ohm 1/4W
• 1 RESISTOR 560ohm 1/4W
• 1 DIODE LED 5MM RED
• 4 TRANSISTORS IRFZ44N
• 1 ZENER1N5231B
• 1 PCB

• VIN 12VDC
• V OUT 5VDC
• OUTPUT PWM - ASTABLE
• 4 OUTPUT CHANNELS TO INJECTORS
• OUTPUTS BY DB9 VGA CONNECTOR

This project was made in the Easyeda software as we can see the tracks and the 3D image of the project working perfectly are no difficulty

PCBWAY has 10 years in the electronics industry manufacturing professional PCBs, assembling PCBs managing to satisfy the demands of all parts of the world, in addition to meeting the highest quality and delivery time standards. PCBWAY allows the manufacture of your PCBs from 5 units.

This project was carried out thanks to PCBWAY, a company dedicated to the manufacture of prototypes and professional PCBs, in addition to offering you a ready assembly service with all the components in your PCBS, complying with the established quality and delivery time standards.

We thank PCBWAY, a leading company for manufacturing and assembling professional PCBs with the highest quality, PCBWAY has fair reasonable prices, punctual shipping time and 24-hour customer service, it also offers you the option of quoting all its services in his web page. Do not think twice and start manufacturing your professional PCBs from 5 units safely.

10pcbs at $5 order them here www.pcbway.com

We thank PCBWAY for the professional pcb they provide us for this project.

GERBER PCB:

https://mega.nz/file/CZ4ETJLb#jAZOsbeZxXt_X4Sn2nI6BpgNkjMttmDuolDYLQ9TU9Y