This multimeter was
designed to measure output voltage and current in a PSU,
where the current sense shunt resistor is connected in
series with load at the negative voltage rail. It needs
only one supply voltage that can be acquired from main
This project is car hands free that retransmits the
audio signal from a cell phone to the FM broadcast band.
By placing the cell phone's speaker near the
The electronic hobbyist corner.
you can find useful circuits with full description,
diagrams and PCB, electronics articles, links and
hope you enjoy the tour to this site. Look around and feel
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miniLOG is a precise standalone voltage logger that
save the data on a SD card. It has 4 basic analog
channels. One 12 bit for voltage measurements, two
10bits for voltage measurements and one 10 bit for
This is a
DC-DC step-up converter based on LM2585-ADJ regulator
manufactured by Texas Instruments. This IC was choosen
for it's simplicity of use, requiring minimal external
components and for it's ability to control the output
voltage by defining the feedback resistors
This is a new design for a universal gear indicator that
can be fitted to any motorcycle as an aftermarket
accessory. Its main advantage is that its operation
depends entirely on the gear shift lever movement,
instead of connecting to speedometer ...
This project is an open source
3.2" Smart TFT display board. The board is based on a
PIC32 and a 3.2' TFT with touchscreen (ILI9320
controller, using 16bits PMP). The software has two main
parts. One that produces the 2D functions and a GUI with
various widgets (buttons, check boxes, sliders etc)
This project is a new implementation of the
AVR DDS signal generator v2.0 found on
scienceprog.com. Itis a firmware based
DDS signal generator and has two outputs - one for DDS
signal and another for high speed [1..8MHz] square
signal. Offset and amplitude can be regulated by two
Lithium Polymer Batteries are a very common source of
power today. Many electronics gadgets have one inside,
and they have some reasonable features. I've bought
great batteries, with different sizes and capacities for
my electronics projects.
TThis project is a DC motor driver, suitable for
motors that of low or medium power. It allows
controlling up to 6 motors or 3 motors if you want to
control the rotation of the motors. The controller is
build around the IC L293D that can provide 600mA per
channel, and a H-Bridge designed with transistors NPN
and PNP transistors, than can provide 1.15A per channel.
This project started out from a need to build a simple device for
monitoring the CAN bus. I choose the NUC140LC1CN 32K Cortex-M0
microprocessor from Nuvoton for
major reason - it has both USB and CAN peripherals.
Build a high quality power supply with
a continuously variable stabilized output adjustable at
any value between 0 and 30VDC. The circuit incorporates
an electronic output current limiter that effectively controls
the output current from a few milliamperes (2 mA) to the
maximum output of 3A that the circuit can deliver.
This project is an accelerometer data acquisition system for automotive
suspension analysis. In other words it's a low frequency spectrum
analyzer based on Lanchpad TIVA Series from Texas Semiconductors.
This is a VCO FM Transmitter with range 500m - 4km
depending on antenna used. Power supply is 12Vdc@100mA,
RF power is 400mW, output impedance 50-75ohm,
87,5-108 MHz, modulation: wideband FM.
This project has been designed around Winbond's
ISD1616 IC (SMD) IC, which is fully
integrated, single-chip, single message voice record and
playback device ideally suited to a variety of
This timer project can be
used to switch ON/OFF any device after a set time, this circuit can be
used in lots of application like switched ON/OFF Radio, TV, Fan, Pump,
kitchen timer, the circuit describe here its unique in its own.
The circuit is based on
CMOS CD4013 Flip Flop IC, The circuit has two stable
states, ON and OFF. Once it is ON, it remains ON till you press the
switch again. A short button press of a tactile switch SW1 latches the
circuit ON and another toggles it back OFF.
In this page we will introduce a great project designed
by Toon Beerten. His project named "DIY
Led Mood Lamp" can become a very interesting
add-on for your room that's absolutely sure it
will impress everyone. As you can see on the
photos, we talk about a color fading lamp, that
Yet another great project by Vassilis
Papanikolaou. This darkroom timer is an improved
version of the Darkroom timer originally created
by Stan Ockers (1999). It's an ideal timer for
UV exposure boxes and such a devices. Many new
features are added. Check it know!
Make a sound card is no more a complex issue. If you use
great IC PCM2702 from BURR BROWN / Texas Instruments you
can create a fully functional USB sound card. This sound
card can be powered from USB port and has one stereo
While developing the
Luma RS485-networked LED driver we discovered a need
for a small and inexpensive USB to RS485 adapter. We
designed an adapter with a FTDI basic UART chip
(FT230XS) and an inexpensive TI differential receiver
(SN75176). Our small selection of parts brings the cost
down to just over $5 for one adapter.