http://www.hc01.com/productdetail?productid=201702040005 https://item.taobao.com/item.htm?spm=a1z10.5-c.w4002-22429966335.24.240a53deu6Q2sz&id=5725927809

http://tinyurl.com/wxwuj7m

I built the 1204 Kit and...

https://www.schmalzhaus.com/EasyDriver/ https://www.sparkfun.com/products/12779 https://www.robotgear.com.au/Product.aspx/Details/2940-EasyDriver-Stepper-Motor-Driver Letting the blue...

http://tinyurl.com/vopamo6 Schmitt inverter to led then...

Unbalanced http://www.falstad.com/circuit/circuitjs.html?cct=$+1+0.000005+10.20027730826997+50+5+50%0Av+432+528+432+320+0+0+40+-48+0+0+0.5%0Ar+432+320+656+320+0+200%0Ar+656+320+656+528+0+800%0Ar+656+320+912+320+0+200%0Ap+976+320+976+528+1+0%0Aw+912+528+656+528+0%0Aw+656+528+432+528+0%0Ap+352+320+352+528+1+0%0Aw+432+528+352+528+0%0Aw+432+320+352+320+0%0Ar+912+320+912+528+0+600%0Aw+912+320+976+320+0%0Aw+912+528+976+528+0%0A https://www.electronics-tutorials.ws/attenuators/t-pad-attenuator.html Balanced http://www.falstad.com/circuit/circuitjs.html?cct=$+1+0.000005+10.20027730826997+50+5+50%0Av+432+544+432+320+0+0+40+-48+0+0+0.5%0Ar+432+320+656+320+0+100%0Ar+656+432+656+544+0+400%0Ar+656+320+912+320+0+100%0Ap+976+320+976+544+1+0%0Ap+352+320+352+544+1+0%0Aw+432+544+352+544+0%0Aw+432+320+352+320+0%0Ar+912+320+912+544+0+600%0Aw+912+320+976+320+0%0Aw+912+544+976+544+0%0Ar+432+544+656+544+0+100%0Ar+656+544+912+544+0+100%0Ar+656+320+656+432+0+400%0Ag+656+432+688+432+0%0A

http://tinyurl.com/y33dbntj 4 to 4, 4 Bit...

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