Unboxing and some assembly of Sunfounder's walking robot kit. A couple of Arduino Nanos in here, plus nRF24L01+ modules, 12 servos and laser cut acrylic pieces.
More on the slightly odd 18650 cell charger bought on Aliexpress
https://www.aliexpress.com/item/1005004749074610.html
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https://www.youtube.com/watch?v=RahMc4zrxpE
Sponsored by JLCPCB ($2 for 10 Boards): https://jlcpcb.com
Loskii HC-28 Clock on Banggood.com - https://bit.ly/2rUGARW
Teardown and chat
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https://www.youtube.com/watch?v=wsm0KSkmvN8
Kindly donated by Jonty, this 240W 60-cell solar panel has an open-circuit voltage of 36 Volts and a short-circuit current of 8.7 Amps max.
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https://www.youtube.com/watch?v=xaUKS5njLgU
Building a little test circuit for the reflow-soldered 74HCT138 integrated circuits. 7 out of 7 worked. Awesome result :)
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https://www.youtube.com/watch?v=3Wexpc4JfKk
Help support Julian's Postbag videos via Patreon: https://www.patreon.com/julian256
USB 1500v Isolator Isolator ADUM4160 USB To USB ADUM4160/ADUM3160 Module New http://www.ebay.com/itm/-/172471559018
USB DC 5V to DC 9V/12V Step-up Module Converter 2.1x5.5mm Male Connector Plus http://www.ebay.com/itm/-/401215703430
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https://www.youtube.com/watch?v=nL3iqCjEFgI
$2 for 5PCBs - order with coupon code: JLCPCBcom
Any questions about JLCPCB or ordering, pls email support@jlcpcb.com
Buck/boost converter with 4x TO220 devices surrounding an inductor. But it's not a LT3780.
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https://www.youtube.com/watch?v=yZNItlOzzFw