Henrik Sandaker Palm

Freelance consultant in hardware and embedded systems based in Norway. I like to find and try new (and old) parts. Hobbies include trail biking and gardening.

[Henrik Sandaker Palm @HSPalm]

Just found myself a new favorite album called Boundary Scan by Periferiya. Some great songs including TDI, TDO, TMS, TCK and the top(?) hit TRST.

https://t.co/x17Uown3jF via @YouTubeMusic

[Henrik Sandaker Palm @HSPalm]

@kscottz I bet four day work weeks are probably the norm right about when you retire.

[Henrik Sandaker Palm @HSPalm]

@Elektor_US @Elektor Not related to the design but I wonder which CAD tool(s) was used to make these monochrome schematics from the 2000s. Very nostalgic. Secondly if I can style KiCAD schematics to look the same without editing every symbol.

[Henrik Sandaker Palm @HSPalm]

The Makerbase/Open MKS servo driver/encoder boards that piggybacks to a NEMA11/14/17/23 stepper motor with CAN bus interface is really clever. However, why choose steppers (with lesser torque) if encoders and feedback loops is required anyways?
https://t.co/9sYHcCpuzl

[Henrik Sandaker Palm @HSPalm]

Lately having the chance to delve into the latest and greatest in small/mini/micro solutions for servo motors, drivers and software libraries. Found some great items already. Beginning an ever evolving thread:

[Henrik Sandaker Palm @HSPalm]

Also a lesser industrial type servo exists, with a strange 1-wire UART interface which you can daisy chain servos with. Removing the RS485 driver is one obvious advantage. If it's reliable, I'm in. https://t.co/u2QGchvYW4
Libs: https://t.co/NEmRnXkxgV

[Henrik Sandaker Palm @HSPalm]

I found two manufacturers of hobby sized servos of high quality with RS485 (and others) interface, where control loop is integrated in the driver. Adjust accelleration, speed, position etc.

https://t.co/tzR7l1CdF6

https://t.co/AfG9UpyDxP

[Henrik Sandaker Palm @HSPalm]

Really impressed by the efforts of the developers of SimpleFOC library to unite any (or at least many) combination of BLDC motor, driver, encoder and MCU to be used as a servo drive system. https://t.co/DhIo30gD3e

[Henrik Sandaker Palm @HSPalm]

https://t.co/JITcUt4Chi
For less than $10, you can have brushless motor with integrated motor driver, optical encoder and electronic brake. Like how the seller warns you they don't know how to use it.

[Henrik Sandaker Palm @HSPalm]

@boxcardavid Even more interesting (to me) are those tiny stepper motors. Actually thought the price was a bit steep. As have been mentioned earlier, it probably originates from some floppy or CD-ROM drive assembly.

[Henrik Sandaker Palm @HSPalm]

@RueNahcMohr Slave never asserts the clock signal

[Henrik Sandaker Palm @HSPalm]

@RueNahcMohr I don't understand the SCL:SDA for each step. Does x mean "don't care"? Doesn't make sense to me because clock is always part of any data transmission.

[Henrik Sandaker Palm @HSPalm]

@raceface604 why is the mechanism not coming out? Something must have slipped inside? Ref. https://t.co/VeHRqsqeki at 5:10. My video in next tweet.

[Henrik Sandaker Palm @HSPalm]

@10yearswiser No, I meant a software that did schematic capture in vector format (I believe). Like the style of schematics you see in datasheets. Not for netlisting/layout. Could be just a plugin for some other software!

[Henrik Sandaker Palm @HSPalm]

Did I not follow someone who makes a schematic capture software only for beautiful schematics, not for netlisting or layout? For documentation etc.

[Henrik Sandaker Palm @HSPalm]

I just earned the 'Home Brewed Goodness (Level 6)' badge on @untappd! https://t.co/tYRxNpxn9I

[Henrik Sandaker Palm @HSPalm]

I just earned the 'Cheers To You! (Level 5)' badge on @untappd! https://t.co/HVM19xiUV8

[Henrik Sandaker Palm @HSPalm]

Interesting use of RCA as interconnects in Gardena irrigation timer.

[Henrik Sandaker Palm @HSPalm]

@politietsorost Hmmm hvem kan det være.