ATtiny10 micro Christmas tree. https://www.shermluge.com/electronics/attiny10/attiny10-christmas-tree

4.2 is current version.

Ring modulator derrived from Randofo’s Instructable: https://www.instructables.com/Ring-Modulator-Pedal/ see that for BOM

A panel for a 6hp passive eurorack attenuator in 1U (IJ format).

The panel can be used without a component pcb (just add the pot and jacks and solder on the back using wires), but it works best with the corresponding component PCB: “Passive Attenuator for Eurorack (6hp, 1U, IJ format) - PCB VERSION A”

Alternative version: markings now cover 300 degrees.

A panel for a 6hp passive eurorack attenuator in 1U (IJ format).

The panel can be used without a component pcb (just add the pot and jacks and solder on the back using wires), but it works best with the corresponding component PCB: “passive Attenuator for Eurorack (6hp, 1U, IJ format) - PCB VERSION B”

This is an updated version of the previous design, the markings are now covering 300 degrees. The back has an alternative design, the panel is symmetric.

Modutrak Searchlight Base 2.1

PCM510xA I2S Stereo DAC – An I2S stereo audio DAC with an internal master clock PLL and a charge pump for direct-coupled ground-centered audio output. Bill of Materials

STM32G0 prototyping board

This is hosted here mainly to provide files for ordering at other manufacturers - the board thickness should ideally be 1.2 mm for best fitment in a shell. You must cut the shell to make the USB-C fit. You also must trim the USB-C legs to sit flush with the bottom of the board.

https://github.com/MouseBiteLabs/Pocket-Protector-Power-Board

Batteries are dangerous.

https://github.com/MouseBiteLabs/Pocket-Protector-Power-Board

Lorka: XIAO-RP2040 E28-2G4M12xx Interposer

HP 740B Chopper Photocell Driver board version 1.2, supersedes v1.0 . Increased creepage distance, EMI-hardened, and connectors up high to work in A16 position. (Fine for A17 too of course). Probably works in 741B and 419A.

V1.0 description: Rejuvenate tired photochopper modules in vintage Hewlett-Packard test & measurement instruments. Remove demodulator photocells and fit this board on the housing in their place. For parts list, assembly, and programming/calibration, see eevblog thread “Hewlett Packard 740B DC Standard Digital Voltmeter (and 740A)”.

Solder a Playstation AV Connector to one end and some multicore 75 ohm cable to the other

Light control board for LED lights. Use 2 boards for control; one board at light with AC input and output and SSR installed, and one board at the control board with a resistor installed. Connect SSR+, SSR- to DC control voltage, set resistor for 20 mA current through SSR. Max load of LED light is 1.2 A at up to 240 V AC. Connect D1, D2 from dimming wires in light to 500 k potentiometer at control board for dimming.

This project is a derivative of PJRC’s Teensy 4.x MCU dev board, plus the 6 ADC input/8 DAC output audio channels PCB using the CS42448 CODEC IC, plus 6 additional op amp output circuits to provide ILDA standard levels of XYRGB laser imagery signals for any OTC laser projectors. Upon successful verification, further details regarding this project will be posted on Github.

It is adapter originaly designed as adapter for 6-pin headers which are present on most STM32 Nucelo and Discovery boards for debugging external microcontrollers. This adapter turns this ST properietry 6-pin connector to standard 10-pin 1.27mm pitch ARM Cortex Debug connector described, for example, at ARM Developer webste. Note that some newer boards exposes this standard connector and this adapter is not needed. Some STM32 boards also do not have this connector anymore (small nucleos and some modern boards). It is also usable as breakout for this connector since it expose SWDIO, SWCLK, SWO, and RESET signal from this tiny connecter on more easily accessible pinsockets.

Schematics

3D View

BOM

Downloads

• Schematics (PDF)
• Gerbers (ZIP)
• Kicad project (ZIP)

Window weather monitor for ECE411 Capstone Practicu