Tiny SCSI Emulator

David Kuder designed a SCSI device emulator with a Teensy 3.5 & NCR 5380:

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Tiny SCSI Emulator

SCSI target emulator based on the Teensy 3.5 (Kinetis MK64FX MCU) and classic NCR 5380 SCSI PHY. Supports multiple targets (Device IDs), LUNs, and device types. 3.2″ x 1.6″ footprint, optionally uses or provides bus termination power. 64×48 pixel OLED status display.

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The design files and source code are available on BitBucket:

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Tiny SCSI Emulator

Friday Hack Chat: KiCad with Wayne Stambaugh

KiCad is the premiere open source electronics design automation suite. It’s used by professionals and amateurs alike to design circuits and layout out printed circuit boards. In recent years we’ve seen some incredible features added to KiCad like an improved 3D viewer and push-and-shove routing. This Friday at 10 am PST, join in a Hack…

via Friday Hack Chat: KiCad EDA Suite with Wayne Stambaugh — Hackaday

Friday Hack Chat: KiCad with Wayne Stambaugh

Tiny CW Capacitive Touch Paddle

Edgar implemented capacitive touch sensing using an ATTiny4 to create a touch paddle for Morse code:

Tiny CW Capacitive Touch Paddle

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Like many no-code operators, after being on the air for a while, I developed an interest and appreciation for Morse Code [..] I purchased a cheap paddle, but I found the clicking noise a little bit annoying.

 

The goal of this project was to create a single PCB with an ATTiny4 AVR, a battery, transistors and a 3.5mm connector jack. The paddle is designed to have exposed conductive material in order to read the capacitive touch.

The under 1kB binary code worked well and without error. This made me wonder how small I could make this code. After optimizing the code, I managed to shrink it to under 512 bytes.

Tiny CW Capacitive Touch Paddle

Upgrade for cheap TP4056 Li-Ion charger board

Robert on hackaday.io designed this upgrade for a cheap TP4056 Li-Ion charger board:

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TP4056 3V3 load share addon board

I wanted to have a load sharing for my future battery operated project with the ability to charge the battery. There is a load of cheap TP4056 boards from China. None of them has the load sharing or voltage regulator on board so I made my own addon board.

Smrtokvitek has shared the board on OSH Park:

3V3 load share for TP4056 v1.1

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Order from OSH Park

Upgrade for cheap TP4056 Li-Ion charger board