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A breadboard adaptor for the ESP-01 ESP8266 breakout board. The Bill of Materials for the adaptor is — 1 × 0.1 μF capacitor, 1 × 10 μF capacitor, 1 × 220 Ω resistor, 1 × LED, 4 × 4-pin headers, 1 × SPDT switch, and 1 × 3.3V regulator.

1590A Compressor

Based on this schematic

The additional components C8, C9 & D2 are for power supply bypass and reverse polarity protection.

Laser diode breakout board (thorlabs)

Textile mounting PCB for rgb addressable through-hole leds

Details

Eagle PCB Files

A “learn to solder” blinking badge

remake of the sidstick from http://gadgetgangster.com/236 works with http://obex.parallax.com/object/532 makes a handheld chip tune player from a propeller running a commodore 64 sound chip emulation for the SID

ATX Breakout Board with dual USB charging capability. ATX 24pin, EPS12V (also known as ATX12V 4+4 for connecting 4 or 8 pin CPU connector), and PCI-E connector can be connected to provide 3 12V “rails” along with 5V and 3.3V outputs.

Revision: A

Top and bottom ground layers are stitched together to allow better heat transfer and reduce noise.

USB bottom port is powered by 5VSB, top port powered by regular 5V rail fused to 3A.

This board is based on ATX PSU Distributor from eMAKERshop, and ATX Breakout Board designed by Francesco Truzzi.

BOM

mouser.com part number provided in parenthesis for reference

• C1: Capacitor 0.1uF 0805 package (77-VJ0805Y105JXQTBC).
• D1, D2: LED 0805 package (720-LGR971-KN-1).
• F1: 3A fuse 1206 package (576-1206L300SLWR).
• J1: ATX 24 pin, right angle (Sparkfun part).
• J2: ATX 12v 4+4/EPS12V connector, right angle (538-39-30-0080).
• J3: PCI-E 12v connector, right angle (538-45558-0003).
• J4: dual port USB-A (571-1903815-1).
• P1: Pin header 1x4 (855-M20-9990346).
• P2: Pin header 1x8 (855-M20-9990846).
• R1,R2: 1.3k resistor (660-SG73P2ATTD1301F).
• R3, R4: Power resistors, OPTIONAL. Needed for old ATX power supplies. Use 5-9W power resistors if PSU keeps shutting down.
• SW1: Power switch (629-GPTS203211B).
• U1: USB charge port controller (595-TPS2513ADBVR).
• X1,X3,X5: Terminal block 4P (571-282858-4).
• X2,X4: Terminal block 2P (571-282858-2).

Optional, X2 & X4 can be combined to use a single terminal block 4P.

For P1, P2 acquiring a single 12pin header and cutting it to length would be cheaper.

Convert esp8266 ESP-01 to use 5 volts Eagle PCB Files

$4.45 / set of 3

Physical assembly designed with the intent to be used in more of a vertical orientation, e.g. on a right-angle header plugged into a breadboard.

Batteryless clock module - now more shrinky than the old version!
Features access to all DS1337 IO pins plus a separate IO voltage supply for their pull-up resistors, and accessible connections to both sides of the discharge-blocking diode between the supercap and regulator.

DS1337S on top, Supercap (I chose a 1.5F that happens to have 30+ohm ESR) and 78L05 (SOIC version 5-volt regulator) on bottom, and one or a pair of [low-Vf] diodes makes for a batteryless clock module that will happily keep time with somewhere around monthly charging, on anything from 7+v (using regulator) or can be run direct on 1.8-5v.
Other passives on board bottom include 2 ceramic SMD caps (0.1u suggested) and 3 of the 4 SMD 0805 10k resistors, and on board top, 2 small electrolytic/tantalum, the last SMD 0805 10k resistor and the optional alternate PTH 10k resistor.

Charge session[s] should total 24-48 hours per month for better results with high-ESR supercaps.
The regulator can also power other small circuitry; just keep in mind power dissipation and current rating (~1W or 100mA).

Used with MySensors.org

PEC tone module for vintage Ampeg amps.

NEWARK PART NUMBERS:

C1 81K0910 Cornell-Dubilier CD19FD471FO3F CAPACITOR SILVER MICA 470PF 500V 1% RADIAL;

C2 31P2979 Cornell-Dubilier 150102K630BB CAPACITOR FILM 1000PF 630V 10% AXIAL;

C3 97M5728 Cornell-Dubilier 150103K400BB CAPACITOR FILM 0.01uF 400V 10% AXIAL;

C4 31P3011 Cornell-Dubilier 150472J630BB CAPACITOR FILM 4700PF 630V 5% AXIAL;

R1 64K5171 Ohmite OF224JE RESISTOR CARBON 220KOHM 500mW 5% AXIAL;

R2 78K8817 Ohmite OF223JE RESISTOR CARBON 22KOHM 500mW 5% AXIAL;

Belden 22ga 8021 bus wire

element14 enchanted objectrs turntable speed sensor

updated sensor board to accept 0.7" reed swithces

Vault with larger through holes for the molex connectors

A1171 is a 1.65 to 3.5 V Hall Effect Switch for both unipolar and omnipolar magnetic actuation. The mode can be selected by a jumper. (digikey part no: 620-1232-1-ND)

20mm PCB for Flashlight Lighted Tailcap. Discussion here: http://budgetlightforum.com/node/37851

Sensor board for ultrasound, IMU, voltage reader, and IMU