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Digital IC Checker

STDDigital IC Checker

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Public Domain

Creation time:2022-12-19 05:27:23Update time:2024-12-26 06:43:48

Description

Digital ICs, such as NAND, NOR, AND, OR, XOR, Decoder, and Encoder ICs, are essential building blocks for creating digital circuits. I keep a collection of these ICs in both DIP through-hole and SMD packages. After repeated use in various breadboard circuits, some ICs occasionally develop faults, such as one or two non-functional gates or complete failure of the IC. Identifying faulty ICs can be challenging, especially when they are part of a larger circuit. Therefore, I prefer to test these ICs before using them in a new project. However, manually testing all the combinations for every gate is a time-consuming process.

To address this issue, I came up with a simple yet unique solution to automatically test these ICs using a Raspberry Pi Pico. I mounted the Raspberry Pi Pico on a PCB equipped with several IC sockets to accommodate different pin counts, along with some passive components and voltage regulators.

Design Drawing

schematic diagram
PCB

BOM

IDNameDesignatorFootprintQuantity
1XL-3216UYC8PIN_IC,14PIN_IC,16PIN_IC,CODE_RUN,POWERLED1206-RD5
2470uFC1CAP-TH_BD8.0-P3.50-D0.6-FD1
3DCBARRELPTHDC_BARREL_BASE1DCJACK_2MM_PTH1
4Switch,6*6*10Plastic head,260G, 0.25mm,Straight lineHW_RESET,SW_RESETKEY-6.0*6.0-22
5UART_PORTJ1HDR-M-2.54_1X41

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