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PIC18F2550 Project Board
Posted on Saturday, April 10, 2010   •   Category: PIC


The new PIC18F2550 Project Board was designed as the development platform for student projects. The board features MCU: PIC18F2550 with external xtal, ADC: one channel 0-2.5V sigma-delta converter, Linear Technology LTC2400/LTC2420, 6-channal 10-bit ADC 0-5V, Display: Two connectors for text LCD or GLCD, USB: onchip USB port with type B connector, Power supply: onboard low dropout regulator, rechargeable battery, Code programming: 10-pin header for In Circuit Loader. The board platform is suitable for developing the microcontroller based instrumentation. Students may build the signal conditioning board, plugs it to PIC project board, develops the code and programs it with loader cable easily.


PLL FM Exciter / Transmitter
Posted on Saturday, April 10, 2010   •   Category: FM Transmitters


This is a PLL controller that works with the VCO/Modulator that I designed. Use these two modules together for a complete baseband-capable exciter unit. This PLL controller features a rock-stable crystal controlled reference, in conjunction with a programmable dividing network which allows the transmitter to be tuned in 100Khz steps from 79.9Mhz to 109.7Mhz by means of digital thumbwheel switches. Oscillator, buffer and driver stages use 2N3866 power RF transistor and output stage used 2N3553 4W RF transistor,


USB Bit Whacker
Posted on Saturday, April 10, 2010   •   Category: USB Interface Adapters


The UBW board is a small board that contains a Microchip PIC USB-capable microcontroller such as PIC18F2455, PIC18F2550, PIC18F4455 or PIC18F4550 and headers to bring out all of the PICs signal lines and board is powered from the USB connection. I designed this board to be a simple parallel port replacement tool for Bruce Shapiro for use in his bits-to-bytes-to-bots class. Apologies to all other 'Whacker' projects like EDTP's Packet Whacker for stealing a great name . All tools used to design this project are free, and the design is open to anyone to use for whatever they wish.


Hi-Fi PCM2702 USB Audio DAC
Posted on Saturday, April 10, 2010   •   Category: Audio DAC


Regulator: This board supplies DAC board with +/- 15V for analog section. MUR860 in rectifier bridge, LM317 and Lm337 as regulator IC's and BG-STD at the output. LM317, LM337 power supply PCM2702: A little modified version of producent application. BlackGate-STD used in OPA2602 power supply, BG-N in analog and Sanyo OS-Cono in digital PCM section. At the output Panasonic FC.


Special Edition Accurate LC Meter with Green Backlight LCD
Posted on Friday, April 9, 2010   •   Category: Test and Measurement


Build your own LC Meter and start making custom made coils and inductors. This LC Meter allows to measure incredibly small inductance making it perfect tool for making all types of RF coils and inductors. LC Meter can measure inductance starting from 10nH - 1000nH, 1uH - 1000uH, 1mH - 100mH and capacitance from 0.1pF up to 900nF. The circuit includes an auto ranging and reset switch to make sure the readings are as accurate as possible. This is a Special Edition LC Meter with upgrade to top notch components. It includes upgraded high precision capacitors, inductor, 1% Metal Film resistors and Gold Plated Machined IC Sockets, header pins and LCD header connectors. This edition is designed for professionals that require unprecedented measurement accuracy.


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