We will make a programmable timer only with basic electronic components so that you can do it yourself. In this case, we do it with some SMD components, but you can easily do it with normal DIP electronic components.

Supplies

GERBER PCB:

https://mega.nz/file/aN5ARRyZ#mjmGFboQjrPvDxa9skjrPqTI6jJ6I7E2zezIf3wbUCY

Step 1: SCHEMATIC DIAGRAM

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.

Step 2: FUNCTIONING

First we feed with a 12VDC source to be able to make our circuit work.

Many times we have a hard time making circuits without the data sheet of a main component. This is the case of a 555, we know that with this device we can carry out many applications, pulse generators, delay generators, etc. But what would happen if I wanted to make a disconnection time delay circuit with a single pulse? Let's put ourselves in the case that one day we don't have this integrated. Well, in this video we will learn how to make the turn-off time circuit with a single pulse, just with a few resistors and a capacitor without using the 555 or another similar component, in addition, we will be able to regulate the duration of the turn-on time after having pressed a button.

We can establish a time that we want just by modifying the capacitor and the potentiometer and we can control loads that handle a lot of current since we are using a relay that handles AC and DC voltage and an output of 10A maximum.

Step 3: ELECTRONIC COMPONENTS

Here we will find the entire list of electronic components used for this project

3 RESISTORS 1206 1K
1 DIODE LED 0805 GREEN
1 TRANSISTOR NPN 1AM SMD
1 DIODE 1N4148W SMD (T4)
1 POTENCIOMETER 100K
1 CAPACITOR ELECTROLITICO 1000UF16V
1 BUTTON 4 PINS
1 RELAY 12VDC 5 PINS
1 BLOCK TERMINAL GREEN 2 PINS
1 BLOCK TERMINAL GREEN 3 PINS
1 PCB

Step 4: FEATURE

VIN 12VDC
CONTROL OUTPUT 30VDC 10A
CONTROL OUTPUT 220VAC 10A
PROGRAMMABLE TIMER
TIME CONTROL BY RC

Step 5: EASYEDA

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

Step 6: PCBWay

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/aN5ARRyZ#mjmGFboQjrPvDxa9skjrPqTI6jJ6I7E2zezIf3wbUCY