Controlling a Transformer with a Servo and the ESP32

Joe RampollaOGR Forum Member

Hi Folks,

I am completing my first tests of using a servo on a vintage transformer for a pure sine wave with a microcontroller and an Android app, RobobRemoFree. I am using an ESP32 which uses the Arduino IDE and code, but is about $6 usually from various sources, and has built-in Bluetooth classic and BLE.

I'd like to thank forum member Trains52 for providing the schematic for the 1063 transformer although I have not yet attempted to repair the whistle feature. I will most likely create the DC offset with a separate circuit.

My code: https://www.josephrampolla.com/servotransformer.html

Take care, Joe.

9/12/2212:01 PM

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gunrunnerjohnOGR Forum Member SUPPORTING MEMBERDIGITAL SUBSCRIBER

Well, that's one solution to a pure sine wave command controlled power source!

9/12/222:21 PM

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StoshuOGR Forum Member

Now that would be great to decorate for a Halloween layout. Put a rubber hand on the lever and watch it go. Way to go Joe...

9/12/225:57 PM

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Joe RampollaOGR Forum Member

@gunrunnerjohn posted:
Well, that's one solution to a pure sine wave command controlled power source!

The only homemade option I could figure out!

9/12/226:12 PM

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Joe RampollaOGR Forum Member

@Stoshu posted:
Now that would be great to decorate for a Halloween layout. Put a rubber hand on the lever and watch it go. Way to go Joe...

How about a rubber chicken?

9/12/226:13 PM

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DarrellOGR Forum Member SUPPORTING MEMBERDIGITAL SUBSCRIBER

I'm interested in that mini o scope!

9/12/2211:29 PM

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Joe RampollaOGR Forum Member

@Darrell posted:
I'm interested in that mini o scope!

https://www.aliexpress.com/ite...__xxxxxx__1663040458

It says it's a kit, but all you do is assemble the case. Unbelievable price if it's true from AliExpress.

Amazon has it too: https://amzn.to/3Bb50td:

9/12/2211:43 PM

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DarrellOGR Forum Member SUPPORTING MEMBERDIGITAL SUBSCRIBER

Thanks!

9/12/2211:50 PM

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gunrunnerjohnOGR Forum Member SUPPORTING MEMBERDIGITAL SUBSCRIBER

@Darrell posted:
I'm interested in that mini o scope!

If you want a nice portable 'scope, consider the Mustool MDS8207, for $65 shipped you get a 40mhz 'scope and a full featured multimeter in one package. This is from AliExpress.

Whenever I want to take a 'scope on the road, this is the one I grab. My Rigol is too big to lug around with all the other tools I typically have to take as well.