Shared Projects

wchesp01

Arduino powered Heated Seat Controller Rev. 4b: GitHub Snapshot

Uses an ESP-01 or ESP-03 to establish a connection with a WiFi network, then ESP serves a webpage that allows you to control relays so you can automate your home. Relays are controlled from atmega328 microcontroller. LCD and anything else can be used if needed. (Use softwareserial and connect ESP’s tx to a virtual RX port on atmega328p. More info soon! Thanks to One Inch of Goodness’s designer (I used his board layout and extended it to my pcb).

Designed and updated by John Bostwick

A little PCB to connect a camera and a video TX with an optional microphone to be used on FPV-model-planes or copters. The PDB includes power filtering for a clean supply to the video TX as well as to the camera.

The supply voltage to the camera and the video transmitter can be 5V or equal to the input voltage (selectable via solder jumpers). The audio signal can be taken from the optional microphone module or from the camera (selectable via solder jumper).

BOM:

• L101 - 100uH 0.62A (WE-PD SMD 7332)
• C101 - 0.1uF (SMD 0603)
• C102, C103 - min 100uF, min 20V (electrolytic cap SMD 8x10.5mm)
• U101 - 1117 5V regulator (SOT-223)
• M101 - SparkFun microphone module BOB-09964

Raspberry Pi 2 adapter for the Pololu Zumo robot shield for Arduino.

Instructable is coming. Contact: [email protected]

Nixie clock with only one IN-14

Plugs into balloon radio card to provide a transmitter. (This version with resistors in the PTT and Enable lines).

1Amp constant current source. You can use this constant current source to measure very low resistances since the voltage drop is R=V/I i.e. 1mV over each 1mΩ.

To guarantee correct operation and not thermally overstress IC1, U1 and R5 keep input voltage between 6.5V≥Vin≥9V

Calibrate with P1 to achieve exactly 1Amp at output with short circuit load or 1V with 1Ω resistor load.

BOM: IC1 LM317T; U1 LT3083; R1 1K6; R2 3K9; R3 18K; R4 910R; R5 1R 0.1% 1W; R6 130R; P1 5K 10turn precision poti; C1 10µF/5V tantal; C2 15pF ceramic; C3 10µF/5V tantal; LED1 green; heatsink of maximum 3K/W or lower for IC1, U1 and R5;

For schematics look here: https://www.dropbox.com/s/cs31b9lijhswvi1/1Amp%20constant%20current%20source.pdf?dl=0

For thermal calculation look here: https://www.dropbox.com/s/gdbk54ipaouoct8/1Amp%20current%20source%20thermal%20calculations.pdf?dl=0

Have fun!

DO NOT ORDER, NOT READY, DOES NOT WORK!

Lab 26’s Quad Photodiode amplifier circuit second edition

V 3.0.1

http://petsd.net/ A petSD is a modern mass storage solution for Commodore PETs with an IEEE-488-bus. It can be used instead of and alongside vintage floppy disk drives. The petSD makes file sharing between the PET and the PC easy by using standard SD cards for storage.

Small ATmega328 based wrist watch with retro 7 segment display made by Osram (DL340M). DS3231 RTC, two white Power LEDs, small vibration motor and 130mAh Lipo on board. Charged over USB (Lipo Charger IC MCP73831)

usbesp13

OSRAM SFH 7050 with temperature probe (Reversed)

Patient Monitoring Packet for Mass Casualty Scenarios

cnc reprap 3d printer

17mm PCB for Flashlight Lighted Tailcap. Discussion here: http://budgetlightforum.com/node/37851

Using ESP-12 or ESP-07