S-5840B / S-5841 – Temperature Switch ICs

sii-ic.com writes:

The temperature switch IC inverts the output according to the detected temperature, enabling a simple circuit configuration ideal for reducing costs and space in a system.

In a temperature switch that is configured using a thermistor, a comparison circuit is required downstream. However, this circuit is not required in SII’s temperature switch IC because the IC inverts the output when the detected temperature reaches a preset value. This makes the IC ideal for reducing costs and saving space in the customer’s system.

In the temperature switch ICs, the output is inverted when the temperature exceeds the set value.

The following temperature switch ICs are available: a latch type that maintains an inverted state (latch) to prevent an unstable output at the detected temperature and a hysteresis type that releases the inverted state when the temperature decreases to the set value.

S-5840B / S-5841 – Temperature Switch ICs – [Link]

0.3mm thin 'organic radical battery' can be printed

Sam Byford writes:

NEC has been developing its organic radical battery (ORB) technology for a while, and today it unveiled the latest iteration. The newest ORB is a 0.3mm (0.012 inch) flexible battery that’s designed to fit into integrated circuit (IC) cards, commonly used for public transport payment, credit cards, and suchlike. Standard IC cards are 0.73mm thick, meaning the addition of a battery shouldn’t prove too taxing on your wallet. Furthermore, the battery can be printed directly onto the IC card as part of the manufacturing process, and the surrounding 0.05mm polymer film can incorporate circuit boards with small components like antennas.

0.3mm thin ‘organic radical battery’ can be printed – [Link]

0.3mm thin ‘organic radical battery’ can be printed

Sam Byford writes:

NEC has been developing its organic radical battery (ORB) technology for a while, and today it unveiled the latest iteration. The newest ORB is a 0.3mm (0.012 inch) flexible battery that’s designed to fit into integrated circuit (IC) cards, commonly used for public transport payment, credit cards, and suchlike. Standard IC cards are 0.73mm thick, meaning the addition of a battery shouldn’t prove too taxing on your wallet. Furthermore, the battery can be printed directly onto the IC card as part of the manufacturing process, and the surrounding 0.05mm polymer film can incorporate circuit boards with small components like antennas.

0.3mm thin ‘organic radical battery’ can be printed – [Link]

ATtiny24/44/84 Mini Board

Derek Wolfe writes:

This is an all-in-one module for Atmel ATtiny24/44/84 8-bit microcontrollers and all necessary components to run them. Having a microcontroller module is nice because it reduces the amount of redundant design in projects using microcontrollers. You only need to provide 5V power and connect to the I/O lines to make a prototype microcontroller circuit. This design easily connects to a breadboard or a subcircuit with header pins and can also be wired directly for a permanent installation. Subcircuit design is greatly simplified by a modular approach because there are no traces blocking the way to the microcontroller pins. All traces on the microcontroller module are essentially on a different level making connections much easier.

ATtiny24/44/84 Mini Board – [Link]

Engineering of a reflow oven controller

ramsay writes:

Sorry for the lack of photos in this article, but we didn’t think about it being worth reporting until after it had all happened. Infact, we were concerned about retaining any evidence of the events. Inspired by the many toaster-oven reflow projects floating around the Internet, we set out to acquire the power to solder all those tiny SMD components ourselves. Toaster ovens aren’t that common in the UK and we were aiming for the lowest cost possible, so we hit ebay in search of a bargain. A very cheap Black and Decker Toast-R-Oven was on offer. The description was “only used a few times”, and the grainy photos showed an indeterminate “foreign” plug with an adaptor. Now, we aren’t generally in the habit of assuming that “some bloke on ebay” must know what he’s doing with electricals, but with the auction starting at £5 (and not going up a huge amount from there by the end) it seemed like a good idea.

Engineering of a reflow oven controller – [Link]

Arduino LCD horizontal progress bar using custom characters

electronicsblog.net writes:

LCD in this picture has 2×16 characters, so in quick way horizontal bar could have 16 steps resolution, but it’s not enough.  Each character is formed from 5×8 pixels. Every character can be sliced in to 5 pieces. After that we can have 5*16 = 80 steps. First step is to create 5 custom characters. More about  createChar() please read at arduino.cc.

Arduino LCD horizontal progress bar using custom characters – [Link]

Capacitor Discharge Microspot Welder / Cutter

Radu Motisan writes:

I’ve just completed the first tests of a new challenging project, a pulsed discharge micro spot welder and cutter tool. It stores energy into a huge capacitor bank, and discharges it via two electrodes in the given target, regularly metal foils/sheets. The logic and the precise timing (of the order of micro-seconds) is controlled by an AtMEGA16-16PU microcontroller running at 16MHz. It can be used for spot welding and for plasma cutting.

Capacitor Discharge Microspot Welder / Cutter – [Link]

RELATED POSTS

Ultimate PIC16F628/627 breakout board

Johan von Konow writes:

A miniature breakout board for rapid development of microprocessor projects

Features

  • ICSP connector for quick programming and power (PICkit compatible)
  • All pins available on standard .1

RELATED POSTS

Miniature USB to serial PCB

Johan von Konow writes:

A small FT232 USB to serial adapter built to fit directly in the USB port

Features:

  • Integrated USB header
  • Standard FTDI cable pinout
  • Single sided PCB (easy to manufacture)
  • Rx,Tx led’s
  • Miniature size

Miniature USB to serial PCB – [Link]

RGB LED Ring V2

blog.spitzenpfeil.org writes:

This is the successor to my old (and lame) RGB LED Ring project. Now you get 6-bit color depth (per color!) and a lot more bang.

Version ’2.0 alpha’ – an intermediate step to true enlightenment – uses one LED driver IC and 3 P-channel MOSFETs cycling through the primary colors. This requires special attention in the code to attempt color balancing (forced dot correction at all times).

As of ’2.0 beta’ (likely to become the final version) it comes with 3 dedicated constant current LED driver chips (MBI5168), which completely avoids multiplexing the LEDs and boosts brightness again. Color balancing is done entirely in hardware using 3 potentiometers. The hardware differences should be taken care of in the core part of the demo code, ‘User-land’ code is mostly the same.

RGB LED Ring V2 – [Link]