Calculators in the workshop

[DericParticipant @deric]

Using calculator to count up and down?

[DericParticipant @deric]

Hi, all,

Can anyone else remember an article either in ME or MEW about modifying a cheap calculator to count up and down the revolutions of a handwheel by connecting it to a reed switch?

I've been through all the back copies and I can't find it but I know I've read it somewhere!

Anybody help?

Best regards

Deric

[dcostaParticipant @dcosta]

Hello Deric,

Using MEW_Indexes **LINK** i found the following:

Subject: Lathe
Title: Cheap and simple turns counter
Author: Fletcher
Issue: 114
Page: 46
Year: 2006
Montyh: April
—————————————————–
Subject: Quick tip
Title: Counting handwheel turns
Author: Rhodes
Issue 83
Page: 22
Year: 2000
Montyh: July

Hope this helps.

Best regards
Dias Costa

[Ian S CParticipant @iansc]

I'v got one some where that I used as a counter for coil winding, just a couple of wires, one attached to the winder, the other so it touches once per rev.Can't remember how I wired it up, and I think you have to push 1 then +. Ian S C

[John ShepherdParticipant @johnshepherd38883]

Deric

To use a calculator to count you can connect a reed swich across the '=' button. Press +1 and then each time the reed switch operates the calculator will count up by one. If you then enter -1 it will count down.

John

[DericParticipant @deric]

Thank you all for your replies.

I knew I could rely on you for an answer. I'm off to the £ shop now for a cheap calculator.

Thanks again

Deric

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