Super Glue Gun 05: Hall Effect Sensor Hysteria!

Felix walks through the H-bridge testing. The H-bridge controls the motor. The input takes in 12 volts to drive the motor and the control pins make the circuit switch the terminals that are connected to the motor. In other words, the microcontroller allows the pins to switch between positive and ground. After the terminals of the motor driver are connected to the motor, Felix plugs it in to give the switch some power to turn on. He does a final test to make sure the circuit works, turning it in each direction.

Ben cuts a pair of PCBs in the shape of a gun handle. He’s designing a PCB based off their foam core design, he’ll then design a 3D printed part around the PCB. He uses the cut PCB to consider placement of the hall effect sensors, the power supply, the microcontroller op-amp triac, and the h-bridge, to fit within a handle will contain a plug at the bottom for AC power.

Felix picked up some regulator packages for Ben to take apart piece by piece to see what’s on them. The packages take in 110 VAC and spit out 12 and 5 volts DC. One such piece hooked up to the AC lines is a surface mount chip known as a bridge rectifier. A bridge rectifier is where you take four diodes and you use that to convert an AC voltage to a DC voltage. The other side of the bridge rectifier is still going to be 120 volts but it’ll be DC. He removes parts of the board and puts it onto his board bit by bit.

[peterdkay]

There have been a lot of negative comments about this being an E14 advertisement! Obviously these people have never tried to design a product for production. A company like E14, Digikey etc need to be involved at the design stage to check that all components are affordable AND have multiple sources. Single sourcing has sent many good designs to the scrap heap when that source dries up!
Great to see your design process in action. Keep up the good work.

[hansdietrich]

I hope for an episode where ben builds somthing that sounds impossible/like not a good idea and manages to make it possible in the end, just like the old videos. if i wanted to watch industrial design, I would watch videos on that topic.

[JoshuaPritt]

thumbs up for the instant fail, blue smoke monster release. That's why I always buy 5 or more of everything!

[butterbelly]

I love this channel so much. It's like if Ray Stantz had his own electronics show, so good.

[allluckyseven]

Ooooh, finally you guys are doing the "coming next week" a segment at the end of the video!

[Marineio]

Anyone else concerned about him resting his fingers on the protoboard whilst 110v AC is flowing at the other end of it?...

[DingusGoesWest]

I'm finding it really interesting seeing the whole development cycle for a product like this. Keep it up! :)

[HoosierBenzo]

Good episode. I liked the part with the guy from E14 but wish they'd have summarized it at the end with some overlays or something to show the viewer the key points in the context of the larger project.

[peerbarnes]

I love this project (mostly because I really want to buy one at the end). Can't wait for next week's video. Good luck TBHS!

[plinks]

Ben: Would you like to introduce yourself?
Hari: Sure my name is Hari Kalyaohgoawdamnlongname
Ben: *in mind* So that's how you say it

[GeekMustHave]

Nice to see I'm not the only one who over engineers simple things. Magic smoke another thing we have in common.

[RJMaker]

Love the progress guys/gales.. Can't wait to see the final prototype.

[joenne]

FULL BRIDGE RECTIFIER

wait wrong channel

[rueebliortak]

Hey guys... What´s about the n64 portable?

[sarcasticat]

Finally, a video, third of which is e14 ad.

[saket]

@TBHS Suggestion for an episode. I was thinking can a driver board be designed to run kindle epaper screen? Raspberry pi projects would be great to use.

[mattbrennan]

A great and long ad for e14. Annoying that there had to be breaks for some of the actual show.

[Enigma]

Why not step the voltage down first before converting to DC? (seems a little safer that way).

[WhiteDieselShed]

Is it more efficient to convert AC to DC and then drop the voltage or drop the AC voltage
and then convert from AC to DC?

Which loses the least amount of power or produces the least amount of heat?

[MartinBgelund]

About the bridge rectifier: Is it a FULL BRIDGE RECTIFIER?