A Simple Control FWD/REW of a DC-motor

About: Gee.. Me 65+ years. My first contact with them logic's was about in them mid-70's. There was allso something called 'DTL-logic', and ewen RTL-logic's, can you imagine that?. My first contact with a 'microco...

The main idea is that you can drive the motor (attached to something) from "HOME" position to "END" position and back to "HOME"

Here I go with +12V, but of course it can be done with +5V allso

What you need is a "motor" ( of course)

A relay with "2" change ower function (COM, NO. NC)

2 microswitches (home & end)

Some LEDS (colour of your choice) 5+1pc's. I use a BI-colour LED for the indication of the running direction

Resistor's 5pc's (hmm... @12Volt appr. 680R)

Fuse +fuseholder (fuse depends on the load & what the relay can handle)

4 Flyback diods ( I use 1N4001 diods)

Step 1: The PCB

The function: Activate the relay via external SW / J1:1 with the required voltage to the relay
As long as the external SW / J1:1 is activated the relay is activated and the motor will run "FWD" till it gets to the "END" microswitch, it will stop

When external SW / J1:1 is not activated the relay will fall and the motor will run "REW" till it gets to "HOME" microswitch, it will stop

With them "SW1" and "SW2" you can choose either to "activate" with +12V or with 0V

(Note: You need to use them both switches "SW1" and "SW2" to change the activating polarity).

I'm using "double" flyback diods on both sides of the motor, WHY?

because.... the EMC kickback goes both positive and negative, and the motor runs in rwo directions, thats why, (I learned this double flyback from a DC-motor manufactorer ABB = ASEA BROWN BROWERY)

The PCB is double-sided. As you can notice: the board is designed a way that it's easy to separate them microswitches to be placed anywhere with a cable.

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Cool circuit design. If you build a prototype, you should definitely post pictures of it.