Shared Projects

Plug a dual-triode vacuum tube (12A*7) into a breadboard. Or do it dead bug style with the screw terminals. Yay.

Add 0.5" hex standoffs to rear holes to support tube/board weight when plugged into breadboard.

I have used this board a bunch on a recent project, and it really beats soldering a bunch of wires to the pins of a plain tube socket!

LM386N-3 chip audio amplifier PCB. I power this with 12V DC (Add a 100µF electrolytic filter/smoothing cap across the DC power input if using a wall wart). The other values are:

R1 10 Ω ½W metal film resistor
C1 0.1 µF 50V electrolytic capacitor (or a ceramic or film cap)
C2 0.047 µF 100V box film capacitor
C3 330 µF 16V electrolytic capacitor

I have used this PCB in a couple of projects and it works well. Low noise and very compact. It operates in 20x mode (You can always bodge on a 10µF electrolytic between pins 1 and 8 if you want noisy 200x mode).

dash button on ESP8266

10 Position PinTap v1.0

Fuzzrite-style distortion for modular synthesizers; ZIPped schematic and build instructions

Passive ring modulator synth module; ZIPped schematic and instructions

Adapter for GPS to Bluetooth

[WIP] micro quad [DO NOT ORDER]

Connects a Nrf24 radio to Arduino Pro

Tims LED Board REV 1

Sparky 1.1 flight controller. This is a Tau Labs target that uses an STM32F3 processor and MPU9150 sensor plus an MS5611 pressure sensor. It is capable of altitude hold, position hold, RTH, gimbal control, and more.

Find more information on the Tau Labs wiki. Find assembly information and BOM on github

916.5 Mhz Radio to BLE Bridge. Designed to communicate with Medtronic insulin pump, CGM, and BG meters.

$12.15/set of 3 (untested/will update)
Adjustable switcher (buck mode) @150kHz - all hand-solderable, durable ground plane construction. Uses an ATX-4pin plug for handy [12v optional] power in & no need to rewire the cable!
Many choices for parts. I bought the LM2595 ICs on a whim; I’ll roll a few and see how it goes.

Modernization of the Apollo Guidance Computer

Pro Mini Arduino based RBG LED Strip Controller

3 DPDT relay board to replace 6PDT relay in Roland S50. Two holes in the middle are for hold-down screws. I recommend putting in sockets so you can replace the relays more easily as they will go out again the way they are being used.

Simple Breakout board for the Bluetooth BLE beacon HM-11

Barometer, magnetometer, GPS and I2C breakout board for CC3D on Cleanflight. You can also plug in an OLED display and GPS. Board size is the same as CC3D (36x36mm), and so is the hole placement (30,5mm apart). Measurements (link to wiki.Openpilot.org) Male headers are meant to be soldered as SMD, except for 3v3 I2C, which is through hole. You can also solder 90degree headers poiting up. SMD jst connectors are on the bottom side, if you dont want to use headers. Pinouts for jsts are the same as their top side counterparts. The direction is marked with “->” sign, poiting towards MAIN and FLEXI ports. Pinouts for MAIN and FLEXI are the same as on CC3D, dont switch rx and tx. If you want to connect it to a computer, you have to plug the battery to power the addon board, otherwise the virtual USB wont show up in Configurator. It works, I still use the prototype board on my big quad. !Make sure to correctly set the port settings!

Port settings

Configuration

Baro and mag bought from the interwebz

BMP180

HMC5883L

How the prototype sits on my quad Proto1 Proto2

Eagle Files can be downloaded from my blog spikey.si

here are two renderings