TEN399 3V1 : Improved OpenSource ADR1399KHZ LM399 10V Ultrastable Precision Voltage Reference

  This is Next 3V1 revision of LM399 ADR1399KHZ based reference board, when i made my last version i received quite few small feedback form users , So I have again made few improvements in This forth version over Third reversion accumulating those suggestions.

Fist improvements is, Board has LT3042 Ultralow Noise, Ultrahigh PSRR RF Linear Regulator To Supply 15V to the ADR1399 and LT1001 , This regulator Offers reverse polarity protection and PG LED.

Board offers Dual Power supply input with a Normal Liner supply input and a USB input with boot converter to use as backup and transport. 

This version has ADR1399KHZ Snubber and also Trim pot has been removed and replaced with multiple resistors with solderable jumper 

There are few minor change in the PCB as well there is great care has been taken in designing slots around the PCB to remove mechanical strain on Chips and reference. Also board has been designed for Testing.  Board also now also have a enclosure. Now on the output side both calibrated 10V and Direct reference voltage is also available as output.

 

microZed Breakout Carrier Card for MicroZed Zynq FPGA SOM board AES-MBCC-BRK-G

 For new FPGA SoC related project, and i will be using Avnet MicroZed Zync SOM board. But Avnet microZed Board has two 100 Pin fine pitch connectors for expansion, Which is impractical for prototyping so i decided to make my own breakout board.  Finding Avent microzed GPIO breakout was little hard and official board has same VCCIO regulator for all banks and avnet board also does not have differential LVDS layout.

So i made this Open source Board, With three separate switching regulator for each bank VCCIO on 4 Layer Gold finish board with most of microZed pins broken out in LVDS pair. PCB is 4 Layer impedance control for 100R LVDS pair. Board has 3 solder jumpers per regulator to change bank voltage of each bank separately.

In this project, I set out to design a custom carrier PCB tailored for the MicroZed Zynq FPGA System-on-Module (SOM), inspired by the functionality of the AES-MBCC-BRK-G. This carrier board is designed to seamlessly interface with the MicroZed module, providing robust connectivity and enhanced peripheral integration for a variety of FPGA applications. From initial concept to detailed PCB layout, the design process focused on optimizing functionality, signal integrity, and scalability to suit custom project requirements. Whether you're exploring embedded systems, hardware acceleration, or IoT development, this custom carrier board simplifies working with the powerful Zynq FPGA platform.

5$ Low Noise, Electronics Bench LED lighting Solution with Linear Power supply, Flicker Free

 This small Article shows my solution to Low noise electronics bench lighting problem, Many electronics Measurement needs to be done in no electrical noise environment. I have repurposed 5$ 30V 3A Linear power supply for this purpose with Custom made LED Strip using philips Luxeon LEDs

    

Ikea BADRING Water leakage sensor Teardown , Smart Zigbee sensor

       This Small Article shows internals of BADRING Water leakage sensor 

Ikea PARASOLL Smart Door/Window Zigbee Sensor Teardown Hall Effect sensor Analysis

      This Small Article shows internals of PARASOLL Smart Door/Window Zigbee Sensor  and analysis of its hall effect sensor using a oscilloscope 

Ikea Vallhorn PIR Zigbee Motion Sensor Teardown

     This Small Article shows internals of Ikea Vallhorn PIR Motion Sensor

How to Reverse Engineer a 12 EUR Intel PCIe FPGA Card IBM 98Y2610

 This Post is showing how to Reverse Engineer a Unknown FPGA Board which I got off Ebay. 

This board has Intel Cyclone IV FPGA EP4CGX22BF14 board can be found on internet with part number IBM 98Y2610

TEN399 : OpenSource ADR1399KHZ LM399 10V Ultrastable Precision Voltage Reference

 This is Third version of LM399 ADR1399KHZ based reference board, when i made my last version i received quite few small feedback form users , So I have again made few improvements in Third reversion accumulating those suggestions.

Fist improvements is, Board has LT3042 Ultralow Noise, Ultrahigh PSRR RF Linear Regulator To Supply 15V to the ADR1399 and LT1001 , This regulator Offers reverse polarity protection and PG LED.

Board offers Dual Power supply input with a Normal Liner supply input and a USB input with boot converter to use as backup and transport. 

There are few minor change in the PCB as well there is great care has been taken in designing slots around the PCB to remove mechanical strain on Chips and reference. Board also now also have a enclosure. Now on the output side both calibrated 10V and Direct reference voltage is also available as output. 

Ikea TRETAKT Teardown, Ikea SmartPlug Socket TRETAKT Internal PCB

This Post is going to be Ikea TRETAKT Tear down images. Showing Internal construction and quality. 

Ultrabase : Open source Ultrazed PCIe Carrier Card for Xilinx AMD Zynq Ultrascale+ FPGA SOC SOM

This post is going to be about designing and construction of  PCI carrier card for Avnet Ultrazed Zynq  Ultrascale+ FPGA SOM board.

These are available from Avnet SOM board are available pretty reasonable price and you can use them for various projects the carry a Zynq Ultrascale on a small SOM formfactor.

Raspberry PI 5 Dedicated Debug UART Connector Pinout

 This short post to show how to connector to Dedicated UART connector, The connector is uses is JST SH 1.0 mm 3 Pin connector 

    The Raspberry Pi 5 features a dedicated debug UART connector, offering a streamlined method for developers to monitor and troubleshoot system-level operations. This UART interface provides easy access for debugging, bypassing the need for USB-to-serial adapters and enabling direct serial communication. The inclusion of a dedicated UART port ensures stable and continuous debugging, especially crucial for system diagnostics and low-level programming tasks

HP Agilent Infiniium 54815A 500Mhz Boot Repair and SSD Upgrade

 This post is going to be about Repair of old HP Infiniium 54815A 500Mhz oscilloscope.  Scope has normal PC motherboard with Windows 98. Scope has issue booting into windows because DS12887A RTC which scope's motherboard uses has internal battery. And because of RTC battery being empty scope has CMOS checksum bad and can not boot as it has forgotten all boot settings. I will try to fix DS12887A and restore setting to CMOS memory. 

Agilent Keysight 1152A Active Probe Autoprobe Smart Probe, Probe ID Mod Patch

 This Post is going to be about modifying Agilent/HP 1152A active probe to be able to support 5V input and Smart Probe ID. 1152A Active  Probe is available in used marked at quite reasonable price but it is not supported by many new generation Keysight Oscilloscopes. As few of these oscilloscope have not fully featured Autoprobe interface and only output +5 -5V . Normally a fully featured Autoprobe interface should set supply voltage as requested by Probes Rp Resistor. 

So to be able to use 1152A active probe with every Keysight oscilloscope regardless how limited its Autoprobe interface is, I have made this small PCB with 4V Regulator with good  PSSR to be able to support +5V input  and 2Kbit EEPROM to support Smart Probe. This probe does not use -5V so its left untouched .