Shared Projects

General purpose shield for WEMOS D1 mini with I2C and output to a FET. Could be used to drive lights, heater, fan, using I2C input of temperature & humidity. Work in progress.

The ItsyBitsy M4 Charger Backpack is an Adafruit ItsyBitsy M4 Express-compatible piggyback module that converts the 3-sided pinout of the ItsyBitsy to dual in-line for use on typical solderless breadboards and soldered protoboards. The adapter was also designed with extra solderable pin connections.

Included is a STEMMA-QT connector that can be optionally configured via solder jumpers to connect to the ItsyBitsy’s UART (RX/TX) or I2C (SCL/SDA) signals. A 2-pin JST LiPo battery connection is on-board that supports charging (100mA charge rate), compatible with Adafruit’s standard battery connector polarity.

6 channel NMOSFET driver

A piggybottom LiPo charger board for attaching underneath an Adafruit ItsyBitsy NRF board. A 2-pin JST LiPo battery connection is on-board that supports charging (100mA charge rate), compatible with Adafruit’s standard battery connector polarity.

This board takes standard definition video and breaks it out into a buffered video output with gain, a horizontal and vertical scan ramps (for driving XYZ monitors) and several important video pulses (CMOS TTL levels) for the serious TV experimenter. With a couple of my other boards, it is possible to construct a complete television monitor using surplus electrostatic CRTs in the one to five inch screen size range. This board is smaller than v1 and is a lot lower in price. Fundamentally, the two circuit versions are the same. I recommend this version over my earlier for cost reasons.

Non-Electronic Add-On For the Defcon31 Conference Badge

ESP BAB

This is a simple circuit that will turn on an ATX power supply using a momentary switch. I made this specifically to use an AT style motherboard in an ATX case, however, you could use this generically in any case that you want to turn an ATX PSU on/off using a momentary switch.

The mounting hole is sized to fit a 6-32 screw so that you can mount the board using a standard motherboard standoff.

If using one of those common AT-to-ATX power adapters, you will most likely have to add a pin/wire for the +5VSB signal.

A parts list is silkscreened on the back of the PCB. Resistors and capacitors are 0805 size. You can use standard 2.54mm single row pin headers for the switch and PSU connections.

This has been tested using an AT motherboard and ATX power supply for several hours and found to work as intended. But as always, use at your own risk.

This circuit was taken from a post found on Stack Exchange. More info can be found here: https://electronics.stackexchange.com/questions/186841/momentary-button-as-switch

Check github project https://github.com/hallard/RAK3172-Breakout

2.046GHz IF bandfilter for RO3210 for use in SA. 100MHz BW

TSOP-44 Type II (2) Breakout for devices like 44-pin SRAM, where pins are on the longer sides of the IC. This is not for TSSOP ICs.

TSOP-28 Type I Breakout for “wide” packages like AT28C16-T, where pins are on the shorter sides of the IC. This is not for TSSOP ICs.

16bit adapter for GQ-4X (& Willem, GQ-2X, GQ-3X) with more options to read Toshiba TC533204AP (32Mo, 8bit) and TC5364205AP (64Mo, 16bit) maskroms: - Jumpers J1 & J2 allow to assign pin 32 & pin 11 to A21 & A22 on the programmer ZIF to select 32Mb & 64Mb rom size respectively.

NOTE: for TC5364205AP (64Mb), create a new device in the ‘devices.text’ file using 27C322 as a model as follow: Name=“TC5364205AP”,ID=“XXXX”,Class=“27C322”,Category=“EPROM”,MFG=“ALL(Generic)”,CodeSize=“8388608”,Adapter=“ADP-054, ADP-055 16 BIT EPROM ADAPTER”;

• Jumpers J3 & J4 allow to turn the adapter in 8bit mode to read TC533204AP using 27C322 as a model.

Adapter is based on the following schematic with aditionnal jumpers to read 64Mb maskroms or to disable the 16bit mode: http://www.mcumall.com/download/WillemProg/16BitEPROM_sch.pdf

Just a simple but compact breakout board for SOIC-8 package devices (ex. attiny85)