Kicad is an open-source electronics design suite, mainly used in PCB design. It also has built-in Ngspice simulator to simulator circuit behaviours. In this article, we will go through the basic setup of SPICE simulation in Kicad and how to find extra SPICE models.
TMAG5170 is a 3-axis precision Hall effect sensor designed by Texas Instruments. On top of the Hall effect sensor, there is a temperature sensor and angle calculator integrated in the IC. The functions of the IC can be interfaced with SPI. There are two variant of this IC, A1 and A2, the two variants differ in measuring range.
In the past, I always avoided projects that require split rail power because of the extra effort needed to get that negative rail. To solve this problem, I designed a simple +5V to -5V switching converter PCB to provide a negative rail from USB. Once connected to power via USB Type-C, the right power rail of the breadboard will be +5V and the left power rail will be -5V.
A 16MB Winbond W25Q128JVSIQ flash module with PMOD interface that can be easily connected to an FPGA.
The RP2040 chip designed by Raspberry Pi has many features including the ability to emulate a SWD interface and act as the debugger for other ARM microcontrollers. Connecting two Picos together creates a mess of wires, so I came up with the idea of designing an RP2040-based board to take the job of the second of the second Pico and get rid of the messy wiring.
The 8-bit register breakout board shrinks the 74HC273 D-flip-flop IC and LEDs onto a PCB only a little larger than a DIP-20 package. All pins on the 74HC273 is broken out and a pull-up resistor is added to the clear pin to prevent the device resetting itself.
