How to generate 3D output with EAGLE and IDF-to-3D

IDF-view-ArduinoMEGA

by blog.cadsoftusa.com:

EAGLE users have long asked for a simple 3D export that would allow them to cross their designs from the electrical realm into the mechanical realm. The current crop of solutions have suffered from either limited applicability or generated a format that wasn’t widely accepted among mechanical CAD tools. The purpose of this blog post is to inform users of a new tool that can finally fulfill this long requested need.

CadSoft has partnered with SimplifiedSolutions Inc. to create the IDF-to-3D tool.

How to generate 3D output with EAGLE and IDF-to-3D – [Link]

Hacking a LAMPAN IKEA lamp to add RGB light and BT

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by Jesus Echavarria:

This project starts a few weeks ago. My six years old daughter usually sleeps with a light on in her bedroom. Talking with her, we decide to hack her LAMPAN Ikea lamp to make some improvements, including a manual RGB controller to set the light colour, a timeout to turn off the light after 30 minutes without changes and a bluetooth connection to control the lamp with a smartphone or tablet. So, if you continue reading the post, you’ll see what we develop!

Hacking a LAMPAN IKEA lamp to add RGB light and BT – [Link]

Cypress Bluetooth Module

CypressEZ-BLEPRoC

by elektor.com:

Following on from the release of their PSoC 4 BLE chip at the Electronica Exhibition last year, Cypress Semiconductor Corp are extending their play in the Bluetooth market with the introduction of their new EZ-BLE module. The module contains the PSoC 4 BLE chip together with two crystals, an on-board chip antenna, RF shielding and passive components, all in a compact 10 mm x 10 mm x 1.8 mm form factor so that designers using the module can apply to add the Bluetooth logo on their products by referring to Cypress’s Qualification Design Identification (QDID) 67366, a unique serial number assigned by the Bluetooth SIG. The module is compliant with wireless regulatory standards in the U.S., Canada, Japan, Korea and Europe and offers a significant saving for designers in development, testing and certification costs.

Cypress Bluetooth Module – [Link]

Protect USB measurement circuits

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by Naomi Price & Martin Rowe @ edn.com:

USB data-acquisition modules offer good value and ease of use, which makes them an attractive choice for manufacturing test. But before you use the modules in a manufacturing test system, you need to take steps to protect them. During manufacturing test of circuit boards or subassemblies, a defect in an assembly may result in a condition that damages a data-acquisition module.

The typical USB DIO (digital I/O) module uses a set of 8-bit bidirectional tristate ports. Figure 1 shows a typical circuit that we test with one of those ports. We use one digital output pin from the USB module to drive the circuit and one digital input pin to read the circuit’s response.

Protect USB measurement circuits – [Link]

Buck converter starts up in just 70 ms

3887

by Susan Nordyk @ edn.com:

The LTC3887 dual-output synchronous step-down DC/DC converter from Linear Technology differs from its predecessor, the LTC3880, by offering an enhanced feature set that includes a faster 70-ms power-up time, higher output voltage, and a speedy ADC mode that provides an 8-ms update rate for one parameter. Housed in a 40-pin, 6×6-mm QFN package, the LTC3887 occupies the same board footprint as the previous version and operates over a temperature range of -40 C to +125 C.

Gate drivers integrated within the LTC3887 drive all N-channel MOSFETs from input voltages of 4.5 V to 24 V. The converter can regulate two independent outputs or can be configured for a two-phase single output. Up to six phases can be interleaved and paralleled for accurate sharing among multiple ICs, minimizing input and output filtering requirements for high current and/or multiple-output applications. The LTC3887 provides output voltages from 0.5 V to 5.5 V, accurate to within +/-0.5%, with output currents of up to 30 A per phase over the full operating temperature range.

Buck converter starts up in just 70 ms – [Link]

ChipHeadBang – design for an USB to Serial converter with ICSP header

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microtherion has published new project the ChipHeadBang, that is available on Github:

Design for an USB to Serial converter with ICSP header for (slow) bitbang programming, based on the CH340G chip.

While this seems to work pretty well, and the CH340G can be obtained extremely cheaply from sources such as AliExpress, driver support can be a bit iffy. For current versions of OS X, the vendor provided driver will cause kernel panics, and as far as I know, only this commercial alternative will work

ChipHeadBang – design for an USB to Serial converter with ICSP header – [Link]

RELATED POSTS

1kHz Chebyshev Filter

Chebyshev_filter

The Chebyshev filter features a steep roll-off, but has ripple in the pass band, so it is not suited for audio signal use, where a flat response is ideal. The roll off is so fast that the common definition for cut-off frequency does not work for Chebyshev filters.  For this type of filter the cutoff is defined as the frequency at which the response falls below the ripple band. This filter is good for removing harmonics and intermodulation in RF applications.

1kHz Chebyshev Filter – [Link]

Leave an excess heat to Fischer heatsinks

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Precise heatsinks from the production of Fischer Elektronik will take care for your devices to stay “cool”.

Over 40 years of experience of company Fischer reflect in an excellent reputation and mainly in a stable high quality of their products. Main production portfolio consists of heatsinks, connectors and enclosures. Narrow specialization on mechanical and electromechanical components is reflected just in details. We can be sure, that a heatsink which we´ll use in our device, will be available the same precisely made even in a year, two,…

Fischer Elektronik takes care for one of the most important feature of heatsinks – planarity and surface smoothness in a place of a supposed touch of component with a heatsink. This a critical place, as even the best heat-conducting pastes have still a noticeable worse thermal conductivity than aluminium and just a high planarity and smoothness enables to use only a thin paste layer.

Also available are versions with an anodized surface (natural, black and other colors) as well as various “exotic” shapes. Upon request company Fischer also makes a custom products, drilling, milling,…
And what in the case that we need to cool kilowatts? – in that case it might be a suitable solution to use a liquid cooling, which can be also find in the Fischer Elektronik catalogue.

Leave an excess heat to Fischer heatsinks – [Link]

Spining BLDC motors at super Slow speeds with Arduino and L6234

P1090837a

by berryjam.eu:

I used specialized triple half bridge IC L6234 (~ 8$). You can make the same spending less money (but more time) with MOSFET transistors or other IC.

L6234 datasheet is surprisingly useless. Go straight to Application Note AN1088 instead.

I added current limiting resistors (1kΩ) to all INputs and ENable pins, a bunch of capacitors recommended in application note and current sensing shunt resistor 0.6Ω (big blue one).

Spining BLDC motors at super Slow speeds with Arduino and L6234 – [Link]

CarTracker – GPS Car locator

F3GCWWGI8765XR5.MEDIUMDo you often forget where you have parked your car? With the help of this project you are able to locate your car with the push of a button. It’s using a GPS module to find the location and an LCD screen to display the distance and direction of your car.

When you park your car, you press the button, car tracker calculates the car location GPS coordinates and stores them in EEPROM so the car tracker can be turned off. When you’re leaving a store looking for your car, the car tracker reads the new GPS and displays how far from your car you are and points in the direction of your car.

CarTracker – GPS Car locator – [Link]