Home made speedos

[jhasselmyr]

hello,
anybody know how to make cheap speedos from about £5-£20, suitable for 12v wind screen wiper motors
jacob

[Guest]

Home made speedos

You can make a simple one using servos and micro switches. There is a guide here-
http://ukrobotics.com/index2.htmhttp://ukrobotics.com/index2.htm

[jhasselmyr]

Home made speedos

ok, i did SPDT relays and four micro switches, where can i get these?
Jacob

[Guest]

Home made speedos

You can get them from maplin electronics-
http://www.maplin.co.uk/Search.aspx?Criteria=spdt&doy=14m5http://www.maplin.co.uk/Search.aspx?...=spdt&doy=14m5
http://www.maplin.co.uk/Search.aspx?doy=14m5&source=15&criteria=microswitc hhttp://www.maplin.co.uk/Search.aspx?...ia=microswitch

[team_ireland]

Home made speedos

Or Technobots:
http://www.technobots.co.uk/index.html?target=dept_512.html&lang=en-gbhttp://www.technobots.co.uk/index.ht...tml&lang=en-gb
http://www.technobots.co.uk/index.html?target=dept_31.html&lang=en-gbhttp://www.technobots.co.uk/index.ht...tml&lang=en-gb

If you only intend to use windscreen wiper motors you can get away with just these microswitches.

[Guest]

Home made speedos

Those arent spdt relays though theyre spco and spno relays. but im not sure it matters

[team_ireland]

Home made speedos

SPDT: Single Pole Double Throw
SPCO: Single Pole Change Over

Basically they are the same thing, 5 pins, 2 for the coil, a common, normally open and normally closed.

SPNO: Single Pole Normally Open.

This has 4 pins, 2 for coil, a common and a normally open.