Shared Projects

Returned to wire monopole antenna and added pads for steel can.

https://hackaday.io/project/71283-small-esp32-module-for-easier-custom-design

Tested with Framemeister and found to be working. I’ve read that this is also compatible with the OSSC. Use at your own risk.

http://dcemulation.org/?title=Dreamcast_480p_XRGB-mini_Framemeister_Cable

All the info you need is in the above link. The only additions I made are C6 decoupling capacitor (0.1µF) and JP1 (wire to SPST switch to select between 240p/480i and 480p modes). You can jump pin 6 inside the AV connector if that’s easier (one less conductor needed). You could also omit pin 7 or connect it to ground inside of the AV connector if you don’t care to switch between resolution modes.

Stereo to Mono Audio Adapter

Note, the web address on the PCB is no longer valid. The article that this is based off of has moved and can be found at the following address.

https://www.ranecommercial.com/legacy/note109.html

See Figure 2 from the above link. This takes a stereo audio signal and sums it to a mono output. Read the above linked page for more info.

TRS = Tip, Ring, Sleeve. T is the LEFT channel and R is the RIGHT channel (although it really doesn’t matter since you’re summing them). S is GROUND. All resistors are 0805 size. Use either mono output, they are both the same (or use both for a dual mono output).

R1/R2: 475 ohm, 1% tolerance R3: 20 k ohm, 1% tolerance

Use shielded cable for inputs/outputs for best results.

Small arduino (ATMEGA328p-MU) compatible and battery powered sentry node. It features a low power PIR presence detector (AM612), RGBW light sensor (VEML6040A3OG) and Temperature/Humidity sensor (HDC1080DMBT). Communication is provided by a RFM69 radio module. In addition, it also features a RGB LED behind the PIR lens for visual indications (if wanted).

It is powered by a AA size Lithium Thionyl Chloride battery with a capacity of 2600mAh (ER145053FP). This is enough capacity to power the device for >8 years, assuming an average reporting rate of once every minute. To preserve power, an external ultra-low power watchdog (TPL5010DDCT) is used for waking up the MCU at certain intervals if no presence is detected.

This board contains QFN packages and uses 0402 size components.

The zipfile contains the gerber files and a pdf with the current schematic, BOM, board assembly views, dimensions drawing, drill info, 3D model… Full documentation, firmware and 3D printable enclosure is still in development and not (yet) included.

USB power control with ESD

DCF77 transmitter for Raspberry Pi

Added caps for the touch pins and a thermal pad for the module.

https://hackaday.io/project/71283-small-esp32-module-for-easier-custom-design

PLCC68 breakout to pin headers

Used to control 40Vpp 20MHz signals

Breakout for ST’s new time-of-flight ranging sensor with 4 meter range.

non-isolated with ethernet connectors

Interface Simmons SDS7 edge connectors.

Project page: http://snw.lonningdal.no

USB Hub for Sega Dreamcast Ports (PC Casemod) with RGB LEDs.