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  • Electronics & KiCAD Tips (24)
  • From Idea to Product (13)
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Recent Posts

  • 83Redux: Part Two – Fujitsu 29LV400TC (U15)
  • I2C Level Shifting With The TCA9517 With Reference Schematic
  • 83Redux: Part One – A Journey into the TI83 Plus Graphing Calculator
  • Electricity 101: Understanding Voltage, Current, and Resistance
  • Retro Electro: The Untold Stories of Electronics History
Original Hardware (Circa 2003) for the TI83 Plus graphing calculator
January 19, 2026

83Redux: Part Two – Fujitsu 29LV400TC (U15)

David Ray

The datasheet of this flash module lists that Pin 16 should not be connected (N.C.), but the board being examined has a connection on this pin.

US-BASED PCB ASSEMBLY

Placing a PCB Assembly Order with Cyber City Circuits

Read More about Placing a PCB Assembly Order with Cyber City Circuits

THE CYBER CITY BLOG

The 'D' Hitkey lets you drag traces.

KiCAD Tip: Press ‘F’ For ‘Auto-Complete Trace’

By David Ray
TCA9517 Schematic Example

I2C Level Shifting With The TCA9517 With Reference Schematic

By David Ray
TI83 Plus Graphing Calculator Circuit Board

Top Tips and Tricks for Maximizing the Use of Decoupling Capacitors in PCB Design

By David Ray
Original Hardware (Circa 2003) for the TI83 Plus graphing calculator

83Redux: Part Two – Fujitsu 29LV400TC (U15)

By David Ray
Splicing cut tape

2 Become 1: Splicing Cut Tape Together

By David Ray

From Concept to Production: Proof of Concept vs Prototype

By David Ray
Allen B Du Mont 224-A Oscilloscope Open Chassis

DuMont: Part Two – An Allen B Du Mont 224-A Restoration

By David Ray

Why a MVP Can Be More Effective Than a Fully Realized Product

By David Ray
KiCAD New Project Window

How to Download KiCAD and Get Started on MacOS

By David Ray
Voltage, Current, & Resistance Formulas

Electricity 101: What is Ohm’s Law?

By David Ray
Three ceramic capacitors

Capacitors: Three Things that Affect Capacitance

By David Ray
Making a custom schematic symbol in KiCAD

KICAD Tip: Using Renumber Pads

By David Ray
SOIC-14 Package

ATTINY1614 Micro-Controller: Good Info to Know

By David Ray
2 Position, 5 mm, Green, Straight Plug

Top 5 Pluggable Screw Terminal Plug Connectors

By David Ray
Clean Traces

The Key to a Successful MVP: Choosing the Right Features

By David Ray
Recommended Soldering Pattern

KiCAD Tip: Making a Reverse Mount LED Footprint – The Simple Way

By David Ray

Maximizing Connectivity with the Nexperia NCA9555 I/O Expander

By David Ray

Retro Electro: The Untold Stories of Electronics History

By David Ray

Requirements – Objectives vs Constraints

By David Ray
4 Position - 3.81 mm Pitch - Straight - Screw Socket

Top 5 Pluggable Screw Terminal Socket Connectors

By David Ray

Recent Posts

  • 83Redux: Part Two – Fujitsu 29LV400TC (U15)
  • I2C Level Shifting With The TCA9517 With Reference Schematic
  • 83Redux: Part One – A Journey into the TI83 Plus Graphing Calculator
  • Electricity 101: Understanding Voltage, Current, and Resistance
  • Retro Electro: The Untold Stories of Electronics History
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