Turn-key PCB assembly services in prototype quantities or low-volume to mid-volume production runs

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Turn-key PCB assembly services in prototype quantities or low-volume to mid-volume production runs

Atmega16-32 development board with Nokia LCD

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When considering new design it is always good to have several references on how to build circuit or interface one or another peripheral device. This one helps interfacing Nokia 3510i LCD display if you need to output graphical information.   Board has ability to adjust voltages for variable targets, including3V, 3.3V, 3.8V, 5V. It is programmable via standard ISP programmer dongle connected to LPT printer interface. Also there are 8 programmable LEDs and 4 buttons for custom applications. It is good reference for your new project or just grab this one as there is also a PCB image available. Continue reading

Precise LC Meter on PIC16F84A microcontroller

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Almost every multimeter has ability to capacitance measurement ability, but inductance measurement is included in more advanced or specialized multimeters. Especially if you like to work with RF technologies, power supplies, LC measurement capability is vital. Instead of buying one I suggest to build one and have pleasure to use accurate LCD metter built by yourself. Design is very simple so it is easy to replicate. It can measure inductances from incredibly small inductance 10nH up to 100mH and capacitance from 0.1pF up to 900nF with auto-ranging capability. Information is displayed on 1×16 LCD module. Zero out button allows to set initial inductance/capacitance for precise measurement. Project page has detailed description on developing LC meter and putting in to nice box. All you have to do is to assemble circuit and flash the program. If you have some troubles in building it, you may buy kit with preprogrammed PIC microcontroller. Continue reading

Talking clock with temperature display

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This is fun project posted under Reynolds Electronics. This is a microcontroller board which shows temperature and “talks” time.     This module uses EMIC text-to-speech adapter that can be purchased at Parallax. Also it uses DS1620 temperature sensor for reading temperature and DS1307 RTC chip for a digital talking. Module is capable to tel time and temperature in female voice, trigger alarms. This can be nice tool to start programming with CCS C compiler as project code is available in project page. Continue reading

Four channel burglar alarm on PIC

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If you want to build simple and reliable burglar alarm system from few electronic parts try this – PIC based four channel alarm system. It monitors 4 normally connected (NC) input channels. If at least one of the channels loop is disrupted it triggers alarm and shows Activated zone by flashing one of LEDs.   Project is really well documented. Because project was developed as final project for Electronics coursework, it has more that documentation – it also includes deep analysis of each part of circuit. So material should also serve as nice tutorial for PIC starters. Or you can just simply build the project, grab source code and flash it. Continue reading

Interfacing Atmega8515L to RF-24G wireless module

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If you are considering wireless design you may consider of using RF-24G wireless module which works at 2.4GHz frequency. With this module your application may reach 1Mbps speed and may provide up to 250 data stream channels. You may check the abilities in datasheet. So there is simple project showing how to run these modules with microcontroller. Simple Circuit which interfaces module to Atmega8515 and receives data from USART terminal which is immediately transmitted. After transmission module enters receive mode These modules are powered with 3.3V so be sure not to connect it to 5V supply as you may damage it. For some of you this example may serve as a starting point to wireless. Download complete Project files(155kB) . Continue reading

320×240 color LCD with touchscreen controlled by AVR

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320×240 is quite big screen that can fit many interesting projects. Especially if control is done via touchscreen. Well controlling such LCD require some control. Patrick have been developing Hitachi TX14D11VM1CAA control software for Atmega162 and recently he released first release.   Display is controlled by S1D13705 LCD controller while touch screen values are read with LTC1298(ADC). Atmega162 board also can read Compact Flash card information(including image drawing) and present it on LCD screen. You can download zipped project from AVRFreaks or from authors page when it will be available. Continue reading