Monday, January 5, 2026

Testing fully assembled new 1130 MRAM board - read retriggering solved!

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TESTING FULLY ASSEMBLED BOARD ON TEST BENCH I put the finished board on the bench and tested it by triggering a read (rising edge of +Storag...
Wednesday, December 31, 2025

Testing attempt on new 1130MRAM board

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PCB AND STENCIL FABBED BY JLCPCB.COM I used my long time PCB fabrication house, JLCPCB.COM, to build the four layer board. Once again it was...
Tuesday, December 30, 2025

Interim method won't work; assembling new PCB

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FASTER 2N2369A TRANSISTORS TRIED The same setup with the square wave generator was used with the faster 2N2369A transistor and I did see a s...
Tuesday, December 23, 2025

Attempting to test the discrete transistor method of resolving the 1130 MRAM retriggering

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NEW APPROACH IN LATEST PCB DESIGN The prior boards used an open collector NAND gate to generate the 80-100 ns pulse that represents a 1 bit ...

Ordered new PCB with my original fab to reduce delays

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WORKED TO INVOKE SPONSORSHIP OFFER FOR THIS PCB I uploaded the design files and contacted the marketing department to take them up on the of...
Saturday, December 20, 2025

Revised design and producing a new board for 1130 MRAM project

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IN ORDER TO CONTROL THE CURRENT SINKING, I MOVED TO DISCRETE TRANSISTORS Since the bounce is dependent on the number of the sense bits that ...
Monday, December 15, 2025

Checking out the low ESR cause for the 1130 MRAM ringing

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QUICK VERIFICATION OF THIS THEORY OF A ROOT CAUSE I soldered a  ohm resistor in series with the 4.7 uF ceramic capacitor. I then tried the b...