Automotive Chip-On-Glass LCD Dot Matrix Driver

The automotive products are quite recognized nowadays. It brings high demand on automotive chip and other related electronic devices. These demands are diverse, which brings difficulties to automotive developers. In this design, users are provided a modifiable firmware using In-System/In-Application Programming (ISP/IAP) via USB. It features the Vertical Alignment (VA) Chip-On-Glass (COG) display module with integrated backlight. The power supply can be done either via USB or an external power supply. This can also be used for an external VLCD that also provide temperature compensation. Its 100 segment and 18 backplanes allow the system to drive up to 1800 elements for graphic display.

The design is comprised of PCA8539DUG 100 x 18 COG automotive LCD dot matrix driver that generates the drive signals for multiplexed LCD, which in this design it is a Passive Matrix Vertically Aligned (PMVA) negative display providing a very dark background with a very wide and symmetric viewing angle. The NX1117CE low-dropout linear regulator is used to provide 3.3V supply for the backlight and the microcontroller. The LPCXpresso low-cost development platform provides the variety of interfaces with respect to the customer designs or needs. It is a highly integrated software development environment for NXP’s LPC microcontrollers. The JP1 to JP6 are used to select either the I2C – bus interface, or the SPI interface. They need to be all in the same position. The silk screen indicates which position to use for a given interface. The JP7 is a jumper that connects the VLCDOUT and VLCDSENSE to the VLCDIN pin of the PCA8539. It must be placed if the internal voltage generation is used. The JP9 may not have been soldered into the board during manufacturing. Instead, a 0Ω resistor (R2) is mounted, in parallel with this jumper. Removing the 0Ω resistor and mounting the jumper makes it easy to insert a current meter and measure the current consumption to the VDD pins of the PCA8539. After measurements, a jumper header can be inserted. The PMEG3005CT 500mA low VF dual MEGA Schottky barrier rectifier is used for the polarity and stress protection.

The development in automotive is quite helpful to people. It is use to accomplish task, save lives, and protect people from any type of danger. With this new design of automotive LCD, it is expected that automobiles will be able to optimize its usage and capability to serve people

Automotive Chip-On-Glass LCD Dot Matrix Driver – [Link]

DIY USB Line Power Meter Stick

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a new project is published on electro-labs.com, check it out:

Another DIY project designed with FabStream’s SoloPCB tool is ready to be shared with Electro-Labs community. This is an USB stick which measures the supply voltage of the USB port and current drawn by the device connected to the port over the stick. Then it calculates the power consumption of the device and displays the whole information with the help of the small OLED display on the board. The stick itself is also powered from the USB port.

The board is built around an Atmel ATMEGA328 microcontroller. To make the circuit as small as possible, the MCU is used in minimal configuration. Internal 8MHz oscillator is used. The voltage and the current are measured by the internal 10 bit ADC. To make the measurements more accurate, an external 2.5V voltage reference IC, Microchip MCP1525 is included. The current is converted to voltage on a 0.01R sense resistor and precisely amplified by LT6106 before read. The stick can measure up to 2.5A. Since the OLED display requires 3.3V supply voltage, L78L33ACUTR linear voltage regulator is used.

DIY USB Line Power Meter Stick – [Link]

National Instruments VirtualBench Review, Teardown & Experiments

In this episode Shahriar gets a hold of a National Instruments VirtualBench! This instrument combines a mixed-signal oscilloscope, function generator, digital multimeter, programmable power supply and digital I/Os in one compact and portable unit. The teardown of the unit reveals a two-board construction with a core single processor which handles all instrument functionality simultaneously.

The unit software (which is embedded inside the instrument memory) is examined in detaile before performing any experiments. Using the VirtualBench, a Si5351 multi-synthesizer clock generator IC is characterized including output signal analyses and I2C decoding. Next by using the function generator and oscilloscope the response of a band-pass 15MHz filter is measured.

National Instruments VirtualBench Review, Teardown & Experiments – [Link]

DIY Smart Plant pot

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by Akin Yildiz @ instructables.com:

it was one year ago that i have published the plant pot – world’s first stand alone smart plant pot that can email you when it’s thirsty, cold, hot, sleeping etc.

a lot has changed since the first release. today I would like to share with you our latest and most stable version yet.

DIY Smart Plant pot – [Link]

Analog to Digital Converter module

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This simple A2D (Analog to Digital) Converter Board can log upto 8 channel of analog signal with 8 bit resolution. This board uses the ADC0808 chip from National Semiconductor.

Analog to Digital Converter module – [Link]

0-20V Bargraph Voltmeter

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0 – 20V LED Voltmeter kit displays the voltage of the source using 20 LED’s. This projects is based on the famous LM3914 IC from National Semiconductor.

Power Supply Input: 5 VDC Max @ 30 mA in DOT mode and 300 mA in BAR mode

0-20V Bargraph Voltmeter – [Link]

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Riverdi TFT display with FT801 controller

 

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If you are looking for a touchscreen LCD display for your next project you should take a look at Riverdi LCD solutions. Their aim is to produce innovative, high quality LCD solutions at affordable prices. They were kind enough to send us a sample of a FTDI FT801 controller LCD display along with their Arduino TFT shield to test out. This LCD display has a build in video engine that accelerates performance over standard TFT displays when used with low power MCUs.

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Therm: a Tiny PID Controller

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by Ethan Zonca @ protofusion.org:

Therm is a very small PID controller with an OLED display, thermocouple interface, and USB port. It can switch an external solid-state relay for driving large loads, or a transistor for driving small loads. When attached to a computer, it enumerates as a USB serial port for easy control and logging of data. The design is based around a STM32F0 microcontroller and the MAX31855 thermocouple-to-digital IC (note: an RTD version of therm is in the works).

Therm: a Tiny PID Controller – [Link]

Visaton Exciter – an exciting loudspeaker

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A loudspeaker without a membrane which can be mounted on any flat surface solves aesthetical and technical problems.

Fans of HiFi sound and similar „audiophils“ usually don´t cover their loudspakers and surely not their membranes. Firstly, to cover a beautiful top-class loudspeaker is almost a sin :-) and naturally all that stands in a way of sound usually influences it in a negative way.
However, totally different situation is in traffic, audio bells, industrial conditions, in various kiosks (POS) and other applications. Here a loudspeaker is usually mounted behind various covers so as to be protected from mechanical damage. For these applications we can use various industrial loudspeakers which are available in dust- and water-proof versions.

If we go even further, applications where even a perforated loudspeaker cover is undesirable – weather from aesthetical or a technical point of view. For these purposes German company Visaton offers elegant solution – “Exciter”. Visaton Exciter is in fact a loudspeaker without a membrane optimized to be mounted on a flat panel, where by a mechanical connection with a given surface a final “loudspeaker” arises. (more…)