Introduction: A Simple Control of FWD/REW of a DC-motor

Picture of A Simple Control of FWD/REW of a DC-motor

The main idea is that you can drive the motor (attached to something) from "home" position to "end" position

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) 6pc's

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

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

4 Flyback diods

The function: Activate the relay via J3 with the required voltage to the relay

As long as the J3 is activated the motor will run "FW" till it gets to the end position, and then it will stop

When J3 is not activated the relay will fall and the motor will run "REW" till it gets to "home" positoin.

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)

Step 1:


KISELIN made it! (author)2016-08-06

Actually i designed this circuitry to be used with a solenioid. That is: When the solenoid "strokes", it takes a lot of amp's, when in position, (to hold), it takes about 1/10:th of amp's, so that's why it's good to limit the current through a resistor when in position and that info you get from the "end" micro, (not in my schema). I hereby attach layouts of the PCB. Note: 1. the PCB is doublesided 2. The top-side is breakable for the reason to attach it to the object in case

DIY Hacks and How Tos (author)2016-08-06

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

About This Instructable



Bio: 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 ... More »
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