I see Robot City Workshop has EZ-b v3 for 110 dollars.
Purple
USA
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— Edited
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PWM Servo Feedback (ADC)
— Add ADC positional feedback to hobby PWM servos via minor mod to EZ-B/Arduino; enables real-time position readout, calibration and puppet mirroring
Try it →
Link? I went there and found nothing about EZ-b3
link
Thanks again Rich
Yea i found it , might as well get the v4 than pay that price.