5v relay generating +ve & -ve pulses

Other Hardware General Electronics
1

First post. please excuse dumb question and crude schematic. I want to use Arduino Uno R3 to sent alternate +9v and -9v pulses through 20 ohm load.Will this circuit do it? (I havedn't tried it because it looks too simple).

image
image835×503 3.11 KB

I've no idea whether this paste has created the schematic in this post.

2

Yes, at least for resistive load.

3

Thank you very much. You may have identified the problem: the load is an electromagnet (or possibly two in series) on an antique tickertape machine. Is it therefore not a resistive load? The resistance of the coils is 20 Ω. Do I need a different circuit?

4

You will need fly back protection from the voltage spikes produced by the collapsing EM field in the inductive load.

5

Yes, but it would be simpler with a DPDT relay or an H-bridge: you would only need one voltage source

6

Yes, +1 for H-bridge. With h-bridge you will need only one 9V battery.

7

Thanks to all who replied. I am now studying h-bridge modules which are obviously designed to do what I want.

8

This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.