Stepper & Trumpet

Let's Make Robots Robots
1

 

 

play noise

  • Actuators / output devices: CC Buzzer
  • Control method: manual
  • CPU: none
  • Operating system: none
  • Power source: biological
  • Programming language: none
  • Sensors / input devices: none
  • Target environment: pocket
This is a companion discussion topic for the original entry at https://community.robotshop.com/robots/show/stepper-trumpet
2

Neato. So the stepper acts

Neato. So the stepper acts as a generator to feed the piezo buzzer.

What circuit did you use? Not quite this one, based on the number of diodes I see.

Consider adding a small hand crank to the shaft of the stepper to make turning easier.

3

great infos ignoblegnomei

great infos ignoblegnome

i need some explanations about this circuit:
http://www.reuk.co.uk/OtherImages/stepper-motor-voltage-doubler-circuit.jpg

why 2 caps??? i used only one cap…   

4

Cool. Remind me on a radio I

Cool. Remind me on a radio I onced built with stepper motor generator: http://www.elexs.de/smotorradio.pdf

(Text is in German but there some pictures and the schematic in the document)

5

cool!

cool!

6

It’s not my circuit, but I’d

It’s not my circuit, but I’d say each diode bridge will rectify the voltage output of the motor coils, which will charge each cap  individually. Since the caps are stacked, their voltage add, and you get voltage doubling.

Tired and slighly buzzed, so forgive me if I did not explain that well. ; j

7

mhhi placed only one cap

mhh

i placed only one cap because i tought that applying a voltage to a cap was the same than apply half voltage to two caps…

because the voltage of the two bridge is serialized

but probably my idea is not true because the overall voltage depends on the phase of the two channels