This is the PCB for a 7 segment LED clock. Find more details at: https://www.thingiverse.com/thing:2947883 and https://git.io/7s

Growport controller 2.1 updated

https://randomnerdtutorials.com/build-an-all-in-one-esp32-weather-station-shield/

NTC VGA DIP board for C.H.I.P

source: https://github.com/NextThingCo/DIP-VGA-PCB

A small GPIB interfacing circuit that has the connector and the bus drivers. The rest is up to some sort of microprocessor board, for example one of those cheap STM32Fxx boards available.

A simple circuit designed to allow a portablized console to have its USB drive housed inside the unit while still accessible via a micro-USB port to easily transfer new software and games without having to open the unit up. Safely switches the voltage and data lines depending on what’s plugged in and turned on.

IR transmitter and receiver

Arduino programmable STM32L432 driving 16 APA102 addressable rgb leds with 5 V boost converter for bright, fast performance. Button allows selection of various preprogrammed patterns. Great at parties!

Auto Wah

CAN bus simulator on the Rasperry Pi

See https://github.com/carloop/simulator for BOM and instructions

This is a super-cheap adapter for standard AVR ISP programmers to projects on a breadboard.

Install a shrouded 2x3 header on the top side, and a 1x6 SIP header on the bottom side. Plug the SIP header into your breadboard and connect a standard 6 pin ISP cable to the shrouded jack.

You can also use it for PDI. In this case, hook up Vcc and GND as usual, then connect !RESET to !RESET/PDI-C and MISO to PDI-D.

ATTiny85 based soil moisture alarm. Uses the cheap 4-pin Ebay Arduino soil moisture sensor break out board.

Parts:

ATTiny85

8-pin DIP socket(optional)

100 ohm resistor SMD

SMD LED

Piezo Buzzer

Adapter for connecting to CR2016 holders via 0.1" header. Boards can be stacked for CR2032 holders. Note: Slice traces on internal faces when stacking.

Arduino compatible LED strip controller for use with the NRFMan control station.

BOM

• 1 x ATtiny85
• 1 x nRF24L01+ Transceiver
• 1 x MCP1703CB 3.3V LDO Regulator
• 1 x 0.1uF Capacitor
• 2 x 10uF Capacitor
• 2 x 1K Resistor
• 2 x 10K Resistor
• 1 x LED 3MM
• 1 x CEG8205A TSSOP-8 Dual N-Channel MOSFET

Stanford XLab - XTB-20

In-situ device driver & data acquisition board for use in Stanford’s eXtreme Environment Microsystems Laboratory

xlab.stanford.edu

Github page: https://github.com/maholli/XTB

Zipit Z2 Breakout v2

Parts List

• C1, C2: 4.7uF 6.3V 0603 (C1608X5R0J475K080AB)
• L1: 1uH 0805 (LQM21PN1R0MC0D)
• U1: TI 5V Regulator (TPS61240DRVT)
• J1: Hirose to Zipit Connector (ST60X-36S(30))
• J2: USB Host Port (292303-1)
• J3: Amphenol FCI Micro USB Port (10118194-0001LF)
• R1: 10K ohm 0603 Resistors (Regulator Enable)
• R2, R3: 4.7k-10k ohm 0603 Resistors (I2C)
• R4: 10-100 ohm 0603 Resistor
• Q1: P Channel MOSFET (DMP2035U-7)
• 1.27mm Headers Optional

Details

Both USB Ports are designed to be optionally broke off the middle section. Score the board with a blade on both sides down the line of holes and snap off the end. Each board when broken off can be used independently.

Main Zipit Board

This section of board contains the Hirose 36 pin connector, 1.27mm pitch headers, I2C resistors and “USB Jumpers”. The USB Jumpers allow connecting either the Micro USB (for device mode) or USB A (for host mode) port to the USB pins on the Zipit. The center pad of the jumper is connected to the Zipit. Bridge the center pad to the left or right pad with solder to set Host or Device mode.

New to v2.1 is a MOSFET that switches 3.3V ON or OFF via GPIO 51 to a through hole in the center of the board. The MOSFET is P Channel which means it is ON by default and writing a 1 to GPIO 51 will turn it off. This can be used for anything you like, but I added a tiny serial GPS module from SparkFun that fits perfectly over the USB Host port.

USB-A Board

This section of board contains a USB A Port, 3.3V to 5V boost regulator, 1.27mm pitch header and jumper pads for the regulator and host power. When attached to the main Zipit board the “Host Pwr” Jumper sets which power is supplied to the port; DCIN from the Zipit or 5V from the regulator. The “Reg Jmpr” sets the regulator to be always “ON” or by toggling the “EN"able pin high (GPIO54 or via header).

Micro USB Board

This board contains a Micro USB port and 1.27mm pitch header. The VCC pin is connected to DCIN allowing you to power the Zipit via USB cable.

Half Bridge Motor/Peltier control board. with the option of using a voltage regulator. Also provides an auxiliary power source for things like cooling fans. Signal power or External power capabilities.