G-switch timer – Vern Knowles
The timer is built using four small inexpensive CMOS integrated circuits. This allows it to run on just 3V from two small AAA batteries. U1 is a 74HC688 8-bit equality comparator. It compares the...
Category: Schematics
Flashing Mains Neon Lamp
Here is a Neon Flasher circuit (untested) for a user request at Elex Quna. This can be built into a switchboard or a gadget for indicating Live Power. D1-C1 form a simple half-wave rectifier,...
VU Meter Circuits and Projects
Here is a collection of web pages of VU Meter projects that helps a newbie getting into the Electronics DIY Hobby Land. A Hobby now in your School days or College can help...
RASON Projects Page
Designing Bipolar Transistor Audio PreAmps, Designing JFET Transistor Audio PreAmps, Designing Op Amp IC Audio PreAmps, Switching Regulator Basics, Using Transistors As Switches. RASON Projects Page – Amateur Radio 10 Amp, 13.8 Volt Power...
Elliott Sound Products – The Audio Pages
There is a very wide range of power amplifiers, preamps, guitar/ bass amplifiers, studio equipment, effects, and other projects to build, including loudspeakers, subwoofers, and many others Elliott Sound Products – The Audio Pages...
Jason Neals DIY Audio and Electronics
Dual Polarity Power Supply Two versions of a dual polarity power supply with printed circuit board artwork. The supplies are built around the popular LM317 & 337 complementary voltage regulators which offer very high...
Experiments with the LM2575
The standard buck regulator circuit delivers a +5V output. This is a rather straightforward circuit and will operate with a wide spread of component values. Optimal values should be selected however to get minimal...
Powered USB Hub Help PC Interface
I got a strange problem as i added more and more peripherals, the pc gave odd messages, “i cannot detect what you are doing” and things like that. I almost flipped trying to locate...
