These are tiny PCBs designed for a specific purpose, usually to add a device to a microprocessor. While my purpose for these is to use them with my PCBs for the Propeller microprocessor, they are equally usable with other microprocessors. Mostly, they are simple interfaces and save the trouble of soldering a few parts on a breadboard. Many of the boards have an optional onboard low current 3V3 LDO Voltage Regulator. This regulator must be fed with less than 6VDC and 5VDC regulated is the norm. It can be bypassed by soldering across the input and output pins. The LDO is a SOT23-3 smt package.
This board is designed to plug into Cluso's BaseBoard1 or similar. It can also quite happily plug into other Propeller based pcbs or other micros such as the ATmega or an Arduino board, etc.
The board has provisions to drive up to 4 Stepper Motors with a maximum current limit of 2A and up to 24V. The Stepper Drivers are housed on plugin boards (see Cluso's Stepper Driver below) to allow for easy and cheap swap out in the event of failure. The interface is via 12 input pins of which only 9 or 10 are used. Each Stepper Driver share a common Reset and common Enable pin with all 4 drivers. Each Stepper Driver is also has its own dedicated Step and Direction pin. Reset may or may not be required, depending on the software and application.
This pcb is designed to drive a 3D RepRap, Mendel, Prusa Mendel, or similar plastic printer. A CNC device could also be driven.
This BaseBoard is also compatible with the Pololu Stepper Driver board.
This board is compatible with the Pololu Stepper Driver board. It measurers 0.6"x0.8" and is designed to plug into Cluso's Stepper BaseBoard. It can be fitted with either the Allegro A4982 or A4984. The difference is the A4982 does 1, 1/2, 1/4 and 1/16 steps where the A4984 does 1, 1/2, 1/4 and 1/8 steps. The pcb is smt except for the current limit resistor. A potentiometer is not used due to the difficulty in setting it up. It is far easier to solder the correct resistor in place. The resistor holes are oversized to permit easy removal should the current limit wish to be changed.
The FT232 board uses the traditional FT232RL FTDI chip to perform the USB coversion to serial. The Txled and Rxled pins from the chip feed a common LED via resistors, thus indicating when data is being sent or received. The board is a miniscule 0.6"x0.75". A miniUSB connector allow the connection to the PC or Laptop via a user supplied USB cable. This cable is quite commonly used for cameras and some phones and is likely to be in the home/office already.
A CR2025 is shown in the pic for size reference. The LED is a small 3mm variety.
The board is able to supply 5V from the PC/Laptop to the device it plugs into, enabled by a shunt, or alternately via wire connection to the shunt headers.
The Propeller transistor reset circuit is smt and fitted under the pcb. For other micros, there is a spare connector pin which can be wired to a small via (pad/hole) to RTS or CTS.
This tiny board measures 0.6"x0.75" and contains a microSD socket (the smt variety with easy access to solder the pins on the front edge), an LED to indicate access (via the -CS pin), and an optional 3V3 voltage regulator. A 6pin header interface is provided for access by the micro, including 5V & Gnd. 3V3 can be supplied by linking the voltage regulator in and output pins.
This tiny pcb has Gold fingers for plugging into a Wii controller such as the Wii Motion Plus (has a 3-axis gyro), a Wii Nunchuck (has a 3-axis accelerometer) or a Wii Classic Controller (joysticks and buttons). Wii clones are cheap on eBay.
This pcb contains an error. I reversed the connector. However, the pcb is usable without the 3V3 voltage regulator and intended connector. By ignoring the solder resist and soldering a jumper wire under the pcb between the in and out of the voltage regulator pads, all 4 pins (3v3, Gnd, SCL and SDA can be accessed on pads meant for a USB-B connector.
I have 6 pcbs available (with the error) and am offering them cheap $3.00 ea including airmail postage.
A new batch with the fix is being manufactured. They contain a 3V3 Voltage regulator and a USB-B (female) connector. The intention is this will plug into a miniUSB to USB-A cable (camera or phone cable) which will then plug into my new miniUSB connectors on my pluggable boards. The miniUSB is setup to drive I2C or PS2 or serial I/O on the 2 pins and provides 5V and Gnd as well.
This is a similar board to Cluso's Weee but is smaller and has a 4pin header instead of the USB-B connector. The 3V3 Voltage regulator is still present.
This tiny pcb measures 0.4"x0.4" and houses an FPC connector for connecting the 4-wire Touch Panels to this pcb. The 4 connections are brought out to a 1x4 0.1" header. I use this to connect my Propeller to a Nintendo DS Touch Panel bought cheaply on eBay. So, it's just a breakout board.