Servo Driver

Servo Driver

You know what its like your super shiny new model is nearing completion , There are always one or two points to iron out ,Will the push rods bind together , or will the control snakes bend as anticipated , is the throttle cable to tight were it passes the fuel tank and flight pack , Will there be enough elevator movement with this servo output arm , is this old servo Centred ??. And many more .

So do you get out your transmitter , try and find an unused model memory position together with your spare receiver , then rummage around for suitable crystals oh and your also going to need a fully charge flight pack and a receiver switch unit would be useful , Now don't forget to fully extend the tx aerial to reduce heat dissipation and save TX battery power . oops now you've poked the cat in the eye Least I think it was his eye , best clean the tx aerial tip just in case ?, ,

What a game there really should be an easier way ?. Well there is now , below is a circuit that can be build into a small box , an old flight pack past it's reliable airborne date Can be used as a power source and an old servo extension lead connects to the servo being set/up or tested . All you need do is reach the " Servo Driver " off the shelf connect to you servo and switch on , The rotary control covers the same 1 to 2ms range as your transmitter/receiver will , Now wasn't that easier ??.. It can of course be used for testing or setting up electric motors by plugging the speed controller directly into it .

I built my prototype on a small piece of veroboard , The control pot being used to secure the unit to a second hand plastic box , the front label was draw in paint shop pro and printed on normal paper ..

All the parts are common bits available from maplins or farnell electronics , The most expensive bit will be the small order post charges .. regards Ken Davies (SMFC Webmaster)

The Circuit

Note R3 May be needed with some Hitec HS81 Servos , (R3 not shown on Layout board below)

IC1 = LM555 or NE555

X=Breaks in the copper tracks ( 5 in all )

P1 May be mounted directly on board Vertically

D1 & R2 Are mounted vertically

D1 is polarised the banded end goes to pin 6 of IC1

Mauve=Wire Links

I have compiled a Maplins electronics order form

For you to print out , With part numbers etc .

Click hear For Maplin order form

( Click on form to return )

Model Electronics


	Servo Driver You know what its like your super shiny new model is nearing completion , There are always one or two points to iron out ,Will the push rods bind together , or will the control snakes bend as anticipated , is the throttle cable to tight were it passes the fuel tank and flight pack , Will there be enough elevator movement with this servo output arm , is this old servo Centred ??. And many more . So do you get out your transmitter , try and find an unused model memory position together with your spare receiver , then rummage around for suitable crystals oh and your also going to need a fully charge flight pack and a receiver switch unit would be useful , Now don't forget to fully extend the tx aerial to reduce heat dissipation and save TX battery power . oops now you've poked the cat in the eye Least I think it was his eye , best clean the tx aerial tip just in case ?, , What a game there really should be an easier way ?. Well there is now , below is a circuit that can be build into a small box , an old flight pack past it's reliable airborne date Can be used as a power source and an old servo extension lead connects to the servo being set/up or tested . All you need do is reach the " Servo Driver " off the shelf connect to you servo and switch on , The rotary control covers the same 1 to 2ms range as your transmitter/receiver will , Now wasn't that easier ??.. It can of course be used for testing or setting up electric motors by plugging the speed controller directly into it . I built my prototype on a small piece of veroboard , The control pot being used to secure the unit to a second hand plastic box , the front label was draw in paint shop pro and printed on normal paper .. All the parts are common bits available from maplins or farnell electronics , The most expensive bit will be the small order post charges .. regards Ken Davies (SMFC Webmaster) The Circuit Note R3 May be needed with some Hitec HS81 Servos , (R3 not shown on Layout board below) IC1 = LM555 or NE555 X=Breaks in the copper tracks ( 5 in all ) P1 May be mounted directly on board Vertically D1 & R2 Are mounted vertically D1 is polarised the banded end goes to pin 6 of IC1 Mauve=Wire Links I have compiled a Maplins electronics order form For you to print out , With part numbers etc . Click hear For Maplin order form ( Click on form to return ) Model Electronics