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Stereo FM Transmitter BH1415F
Posted on Monday, November 10, 2008   •   Category: FM Transmitters


Here is a stereo FM Transmitter based on BH1415F wireless audio link IC. Phase Locked Loop controller use Microchip PIC16F628 and the the PLL frequency programming can be displayed with 8×2 and 16×2 LCD display. The frequency range can adjustable from 88-108 MHz.


BH1415F FM Stereo PLL Transmitter
Posted on Monday, November 10, 2008   •   Category: FM Transmitters


This is FM PLL Stereo based BH1415F IC from Rohm, it's has built in PLL and Stereo Encoder. You can download the schematic, pcb layout and Hex code. The transmitter menu display with LCD, and this have step 100Khz, 200Khz,.....1000Khz and have Mode menu (stereo/mono). In Action, LCD Display can solder directly on the bottom.


Accurate LC Meter with Green Backlight LCD
Posted on Monday, November 10, 2008   •   Category: LC Meter


This is one of the most accurate and simplest LC inductance / capacitance Meters that one can find, yet one that you can easily build yourself. This LC Meter allows to measure incredibly small inductances starting from 10nH to 1000nH, 1uH to 1000uH, 1mH to 100mH and capacitance from 0.1pF up to 900nF. LC Meter's circuit uses an auto ranging system so that way you do not need to spend time selecting ranges manually. Another neat function is the "Zero Out" switch that will reset the initial inductance / capacitance, making sure that the final readings of the LC Meter are as accurate as possible.


USB 8bit Interface Board
Posted on Monday, November 10, 2008   •   Category: USB Circuts


This is a USB (universal serial bus ) interface board which can be used to connect 8 (parallel) data lines to the USB. The interface comes with a small internal FIFO (384 byte Tx, 128 bytes Rx) and 4 handshake lines which make it suitable for interfacing microcontroller designs to the USB. It can, also be used as simple 8bit IO when the so-called “bitbang mode” is enabled. Note. however, that in this mode, the bits will not come out in a constant bitrate but in chunks of 64 bytes with specified baud rate followed by a delay.


PWM Motor Driver with H-Bridge
Posted on Monday, November 10, 2008   •   Category: Motor Controllers


This pulse wide modulated driver is designed for DC Motors with a maximal power consumption of 200 watts. It works with a so called H -Bridge. It has three input pins, two for the direction and one for the pwm-signal. The inputs are designed for logic level signals ecpecially for microcontroller outputs.


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