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A little bigger than a postage stamp, the Simple Servo Tester lets you control two digital or analog servos without using a transmitter or receiver, j...
Check to make sure you have the following parts: Parts list Potentiometer Knob Green LED NPN Transistor Right angle pin header (9 ...
Let's start easy, just press the knob onto the Potentiometer. Note that the the potentiometer shaft is shaped like a 'D', so the knob won't slip when ...
Insert the 555 timer chip. Be sure that the notch faces to the right as pictured here.
Bend the leads by holding onto the component with one hand and fold the leads together with your fingers.
Insert the capacitors at C1 and C2, they are not polarized so it doesn't matter which way they go in. Insert the four resistors. The 220k ohm (red-re...
I like to hold all the components in place with some tape, then flip over the board and start soldering.After soldering, snip the leads.
Snip apart the pin headers so that you have three of them with three pins each.Solder just the center pin of each header. Then pick up the board and r...
Spread apart the leads on the transistor and insert it so that the flat side faces the 555 chip.Insert the rectifier diode as shown with the band faci...
Insert the trim pot as shown then solder everything in place.
Place the potentiometer in position and solder just one pin at first - same as with the pin headers - so that you can adjust it to be straight and flu...
Always check for a green light before plugging in a servo.The Simple Servo Tester has reverse polarity protection for itself but it will not protect a...
Plug in your servos, the polarity is marked on the board. The Signal line is usually White, Yellow or Orange depending on which brand of servo you are...
Center the knob by lining it up with the line printed on the back of the boardUsing a small screwdriver, adjust the trim pot until your servo is cente...
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