Maker Feed Electronics, DIY, Makers, Hackers and Internet of Things (IoT)

  • Latest Articles
  • Popular
  • News
  • Blogs
  • Platforms
  • Automation
  • Stores
  • Podcasts
Home » Blogs »

Articles from Jara’s Spare Time Electronics

Visit www.jsykora.info, subscribe

Premonitions from 2019

From www.jsykora.info 3 weeks ago in Blogs

Bad sleep last night brought me ideas, and since we’ve got a situation down here in Siemens, the topic was not unexpected: CRISIS STARTSAS UBER FALLS. and NO CORRECTIONBEFORE TRUMP’SRE-ELECTION. Let time travelers from 2020 and beyond let us know…...

Release of the VFD-Watch V2.1

From www.jsykora.info 2 months ago in Blogs

The VFD-Watch project is now released in version V2.1. Enjoy!

Koupě domu v ulici Ant. Škváry, majitel Martin Zuna, Lysolaje

From www.jsykora.info 3 months ago in Blogs

Tato stránka dokumentuje jednu z nemovitostí, u kterých jsem projevil vážný zájem o jejich koupi. Postupně zde bude popsán průběh vyjednávání s RK a s majitelem. Rohový řadový rodinný dům stojí v ulici Antonína Škváry 1041, Kladno. Současným majitelem (LV…...

ATtiny’s UPDI interface activates permanently upon noise input!?

From www.jsykora.info 4 months ago in Blogs

UPDI – Unified Program and Debug Interface – is the new programming and debugging interface on new ATtiny MCUs from Microchip. The UPDI requires just a single pin on the MCU, so it is very suitable for low-pin count chips.…...

Inexpensive Adafruit SMT Breakout boards (SOIC, TSSOP, MSOP) from a PCB Panel

From www.jsykora.info 6 months ago in Blogs

I created a smal 100x100mm PCB mini-panel of some of the SMT breakout boards from Adafruit. Each mini-panel contains: 3x SOIC-20 (A-side) and TSSOP-20 (B-side) 5x SOIC-16 (A-side) and TSSOP-16 (B-side) 5x SOIC-8 (A-side) and MSOP-8 (B-side) 4x SOIC-8 (A-side)…...

Project of a Curve Tracer Released!

From www.jsykora.info 8 months ago in Blogs

I have finished & released my build of the Analog Curve Tracer. Complete design is available on the permanent page in the Project menu above.

Cheap AVR UPDI Programmer from ATtiny817 Xplained Mini

From www.jsykora.info 8 months ago in Blogs

New AVR processors from Microchip/Atmel use a 1-wire UPDI interface for flash programming. You could use either AVR ICE or Pickit 4 as the “official” programmers (I did not test any of them). Both of these cost >50 EUR. A…...

PN7120 does not respond on the I2C bus

From www.jsykora.info 1 year ago in Blogs

NXP’s PN7120 is NFC controller for contactless communication at 13.56MHz. It interfaces with the host CPU via the I2C bus. The I2C slave address of  PN7120 is 0b010100Lx, where L is a configurable LSB of the address (by pin B2,...

The Tale of a GCC Upgrade

From www.jsykora.info 2 years ago in Blogs

Once upon a time, I decided it is a good time to upgrade the version of gcc compiler we use in our ARM926-based firmware project. Historically, this project uses gcc version 4.6, which is quite outdated nowadays (January 2018). In...

Did you know: Unaligned accesses in ARM

From www.jsykora.info 3 years ago in Blogs

The X86 has always supported unaligned accesses. In the ARM world the first architecture that supported unaligned accesses in hardware was ARMv6. The architecture was implemented in the ARM11 core around the year 2002 and onward. There is an excellent...

Connecting MCU and FPGA at 100Mbit/s Using Ethernet RMII [Part 2]

From www.jsykora.info 4 years ago in Blogs

This is Part 2 of a two-part series on Ethernet RMII. In Part 1 I described my hardware setup and basic Ethernet operation. In the second and final part I will describe the design of specialized MAC cores I implemented...

Connecting MCU and FPGA at 100Mbit/s Using Ethernet RMII [Part 1]

From www.jsykora.info 4 years ago in Blogs

This is Part 1 of the two-part series on Ethernet RMII. Part 2 is also available. Imagine your application requires a non-standard periphery controlled by an embedded processor. What options do you have? The periphery can be implemented in an...

How to: Altium Circuit Maker PCB to OSH-Park

From www.jsykora.info 4 years ago in Blogs

How to export PCB design from the free Altium Circuit Maker v1.0.4 so that it can be submitted to OSH Park fab. This took me an evening to figure out; OSH Park service was bitching about missing “outline” and/or drill...

[vid] A little ping-pong after the work

From www.jsykora.info 5 years ago in Blogs

   

[Pic] BGA Dead-Bug Style

From www.jsykora.info 5 years ago in Blogs

  [half-way through; click a pic to see hi-res] [connections to bga] [finished “product”] And it (almost) worked! Though not at-speed, because of wire inductances.

A Fistful of Radios

From www.jsykora.info 5 years ago in Blogs

During pre-Christmas sale on Seeed Studio Bazaar  they offered these digital radio modules with the nRF24L01+ chip for only US$0.81 each. So I bought 10 of them outright What would YOU  suggest to do with them? Build a wireless flower...

Error: jtag status contains invalid mode value – communication failure = SOLVED!

From www.jsykora.info 5 years ago in Blogs

This issue bugged me a long time, finally I solved it this evening. Debugging code on my PIP-Watch using my ST-LINK-v2 JTAG debugger was very painful because the debugger software — OpenOCD and GDB — kept failing randomly during debug...

Bluetooth Power Modes

From www.jsykora.info 5 years ago in Blogs

In previous post we discussed CPU power consumption in PIP-Watch. Today we look into Bluetooth power consumption because it is significant as much as the CPU power. Bluetooth Radio States Practically the only significant part that consumes a lot of...

Processor Low-power Optimizations in PIP-Watch

From www.jsykora.info 5 years ago in Blogs

Processor Power The PIP-Watch is a battery-powered device that will be continuously on, hence the average power consumption is one of the most important engineering aspects. In this post I will go through two simple steps of optimizing CPU power...

PIP-Watch Boards & Assembly

From www.jsykora.info 5 years ago in Blogs

The printed circuit boards for PIP-Watch Zero came from Pragoboard fab on Friday 12 Sept. I ordered three pieces because the cost is practically identical as for two or one. On Saturday I assembled one board, and on Sunday I...

About Maker Feed

We feature articles by the greatest makers, hackers and DIY enthusiasts from around the web. All websites and feeds are featured in the Feeds widget below.

Subscribe

  • Twitter
  • Facebook
  • Flipboard
  • RSS Feed

Feeds in Blogs

  • Dr. Gough Lui Subscribe
  • RTL-SDR Subscribe
  • Conor Patrick Subscribe
  • Docker Pirates Subscribe
  • Becky Stern Subscribe
  • Igor Pecovnik Subscribe
  • Lucky Resistor Subscribe
  • Board DB Subscribe
  • Kaspars Dambis Subscribe
  • Tinkerman Subscribe
  • All About Circuits Subscribe
  • Wade Wegner Subscribe
  • Sprites mods Subscribe
  • BEEKn Subscribe
  • Krebs on Security Subscribe
  • Gough’s Tech Zone Subscribe
  • airfy Inc. Subscribe
  • Johan Kanflo Subscribe
  • Hackaday Subscribe
  • import Subscribe
  • Matthew Petroff Subscribe
  • Mike’s Hardware Experiments Subscribe
  • Dan Strother Subscribe
  • Dimme’s World Subscribe
  • Neil’s Log Book Subscribe
  • Chris Stubbs Subscribe
  • Wolf Paulus Subscribe
  • IoT M2M blog Subscribe
  • MotoBrain Subscribe
  • Nootropic Design Project Lab Subscribe
  • electronut Subscribe
  • Bits on a Board Subscribe
  • Geoffrey Subscribe
  • Martin Harizanov Subscribe
  • Jeremy Blum Subscribe
  • My 2µF Subscribe
  • Tim’s Blog Subscribe
  • Paul’s Electronics Subscribe
  • Nathan Chantrell Subscribe
  • Limpkin’s blog Subscribe
  • Embedded Day Subscribe
  • Provide Your Own Subscribe
  • Miguel Grinberg Subscribe
  • Misc. Projects & Random Useless Stuff Subscribe
  • KOBAKANT Subscribe
  • Oona Räisänen Subscribe
  • Projects from Tech Subscribe
  • JeeLabs Subscribe
  • Dhakajack Subscribe
  • Evil Mad Scientist Laboratories Subscribe
  • Raspberry Pi @ Gadgetoid Subscribe
  • Derek Molloy Subscribe
  • Electronics-Lab.com Blog Subscribe
  • LowPowerLab Subscribe
  • bildr Subscribe
  • Łukasz Wieczorek Subscribe
  • maniacbug Subscribe
  • Tinkerlog Subscribe
  • JulietMikeBravo Subscribe

Maker Feed