cmardone of Valpoder wrote an article on hacking the GTP USB LITE usb pic programmer, we wrote about it previously: GTP USB LITE is a pic programmer based on the pic18F2550 disgned by SISPIC from spain A lot of people built this circuit , and it became obsolete.. The firmware has several limitations(ex: driver only for xp) […]
Category Archives: project logs
Simple DIY JBC soldering station
jry shared his simple DIY JBC soldering station in the project log forum: Current status: transformer inside old PSU housing as temporary solution. I don’t want to mess with mains on my desk. For now battery powered (3.2V LiFePO4) logic part. Opamp, Atmega328p, three buttons, LCD (waiting for b&w OLED instead of this one for […]
Simple 6x USB charger with current monitor
Frank Zhao shared his simple 6x USB charger with current monitor in the project log forum: This is a simple 6 port USB device charger with a individual current monitor on each port. The charging current is indicated using RGB LEDs. Blue means slow charge (under 250mA), green means 250mA to 750mA, red means over 750mA, and purple […]
Battery powered LED Matrix clock project
cburns shared his LED Matrix clock in the project log forum: My latest electronic project, the LEDC which is a LED Matrix clock. It’s the size of a standard business-card, and battery powered. I wanted something that would sit on the desk and I thought, why not use business card holder? It works great, and it’s […]
ATtiny LED driver for an RC car update
joeforker posted an update on his ATtiny LED driver for an RC car we covered previously: This board delivers 100mA through 2 series-wired LEDs like a champ, powered by a 2S LiPo. Night drives are looking bright. The glaringly bright uncomfortable-coming-straight-towards-you high beam look has been achieved. :-) As usual, mistakes were made. The through hole components […]
Using traces as resistors
NsN writes: A while ago I needed some small value resistors as current shunts and I started wondering about the feasibility of using traces as resistors. There are many theoretical reasons as to why copper traces make bad shunt resistors, but I found surprisingly little practical data. The traces are (from left to right): – […]
Color wordclock project
EverLost shared his color wordclock in the project log forum: Display: It is now 2:45pm (Simulated, the RTC part is still WIP…) I am always fascinated with exotic clocks. You may have came across a DIY word clock before (if not, google it). This is my own flavor of word clock. Color, Traditional Chinese character, with a […]
Minimal PIC 18F2550 USB board V2.0
cmardone made this 18f2550 minimal board v2.0: It was made to simplify breadboard connections for a 18f2550 pic micro. Features: improved Silkscreen ART including a polinesian MOAI :) smd 1206 components , more simple to solder 1 smd led mini usb conector reset pads mclr resistor Via the forum.
antiAFK project
scasagrande shared his project antiAFK in the project log forum: The antiAFK is essentially a stripped down Arduino Leonardo with the intention of sending occasional keyboard commands to the attached PC with the intention of preventing the user from being logged out of online games due to inactivity. This can help on high population servers […]
Yet another BeagleBone proto cape
piranha32 writes: After seeing t0mpr1c3’s proto cape, I thought it would be worth to share my cape prototyping board, designed a while ago for BB White. It has space for EEPROM chip, so it can be used also for testing prototypes of capes which will later will go into production. To make life easier, the […]
Proto Cape for BeagleBone
Tom shared his prototyping cape for the BeagleBone/Black in the project log forum: I spun a prototyping cape for the BeagleBone/Black. The design is derived from the LGX Proto Cape created by Alexander Hiam for LGX / Logic Supply and released under Creative Commons Attribution 3.0 Unported License. I removed the SMD component footprints, which seemed […]
ATtiny LED driver for an RC car
joeforker posted his ATtiny LED driver for an RC car in the project log forum: I thought I’d share a little board I’m making to add headlights to a model car. The board is a little 1″ square thing with mounting holes. The top right contains a constant-current driver built from a BC847 BJT, a 2N7002 […]
Networked 1D Pong
phalox decided to build his own version of 1D pong with the TCP/IP stack: Not just being a copycat, I really had to add a bit of extra mustard. In this case an entire TCP/IP stack! This results in a network connected 1D Pong game, in which you can have as many nodes (players) as you would […]
Controller board for RGB LED Matrix displays update
EmbeddedCreations posted an update on his controller board for the 16×32 and 32×32 RGB LED Matrix displays: The board looks significantly better with the Teensy soldered directly, instead of with the female headers, but I want to keep the option for people who want to remove their $20 Teensy board to use with another project. […]
High altitude balloon electronics
Erdabyz writes: I’m part of a students association and we’ve had a helium tank in our place since 2003 which is still almost full. None of the current members knew where it came from until recently (turned out that we had a RC blimp of some sort back in those days…). So some time ago a […]
A development board for Lua programming update
doub posted an update on his Lua board we covered previously: Today I soldered a second one, and it looks much better. Here is a picture. I just plugged it on my PC while pressing the DFU button and Windows recognized it as a “STM Device in DFU Mode”, and properly downloaded the drivers, so […]
Daisy chainable I2C splitter PCB
Tom shared his 1-3 I2C splitter he made in the project log forum: One of a series of modular expansion boards for the I2C bus: a 1-3 splitter for branching I2C signals. This is the first of a series of boards with compatible headers for modular expansion to the I2C bus. The boards all have the […]
18F2550 minimal board
Cristian shared his 18F2550 smd minimal board in the project log forum: It was made to simplify breadboard connections for a 18f2550 pic micro. Features -small , smd 0603 components -led -mini usb conector -reset pads -mclr resistor For more information visit the project’s site -Valpoder. It’s also up on Tindie. Via the forum.
Open source PID controller (DIY Arduino shield)
Tom posted his Arduino PID controller shield in the project log forum: Program a temperature profile to mash beer or reflow solder. Here’s how. This full featured open source PID controller uses a DIY stripboard shield for Arduino Uno and compatible boards. Firmware based on osPID massively revamped and extended, blood was sweated over new auto […]
How to use GPIBUSB adapter
A followup to the GPIB USB Adapter. Steven demonstrates how to use his adapter in two different software environments the Ubuntu 13.10 + Python + InstrumentKit and the Win7 + Terminite. Via the forum.