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Electronic Projects
to Build, Page 1 Electronic Construction
Projects: # - BC - DE - GHI - MN - RS
T - Z Last Updated on:
Monday, October 03, 2011 06:07 PM
Links to electronic circuits,
electronic schematics, designs for engineers, hobbyists, students & inventors:
1.5 Volt 1970's Style Caboose Marker Flashing Red LED Light - A
circuit that drives a red LED from a 1.5 volt battery and simulates an
incandescent light. Duty cycle can be changed by selecting resistor
values….(schematic / circuit added 6/07)
10x Linear Laboratory Amplifier - The aim of this project was to
develop a linear analogue amplifier designed for laboratory use. This
amplifier has to realise a voltage amplification of 10x and is intended to
amplify function generator signals for tests. (added 10/06)
1750 Meter Lowfer Band amplitude modulated RF - The 74HC4060
oscillates at 6.000 MHz, and is divided by 32 to get 187.5 kHz. Pin 5
of the CD4060 is a 732 Hz square wave which can be used to modulate
the output stage rather than using a micro controller, but in this instance,
the modulation…....
2-250 MHz RF Network Analyzer - A homebrew network analyzer, with full
calibration! (Featured in QEX) (electronic Construction Project added 05/06/07)
2-250 MHz VHF Synthesized RF Source - Here is a VHF source, all controlled
by a PIC. (Featured in QEX) (electronic Construction Project added 05/06/07)
38-kHz IR LED Circuit - Infrared LEDs are commonly used for object detection
in robots. Blinking the LED on and off 38,000 times a second improves long-range
detection and reduces false triggers. Pictures, comparisons, and a schematic
demonstrate a simple, reliable, low-power 555 CMOS circuit. (project added 10/06)
4 MHz Amplitude Modulated RF Source - A while back I needed an amplitude
modulated signal source at 4 MHz. This circuit was literally thrown together
with parts laying on the bench. I built it dead bug style on a piece of copper clad
board. It should work with little or no modification, other thano get it to oscillate,
and at higher frequencies, you might have to reduce the capacitor values a little.
Just be....(schematic / circuit added 6/03)
555 Timer as an A/D Converter - Measure voltages accurately with a
microcontroller using this simple circuit. Includes sample program for Parallax
Basic Stamp. (electronic project added 2/06)
6V Ultra-Bright LED Chaser - This is a spectacular but completely useless
project. It lights Ultra-Bright LEDs in a sequence and each LED flashes brightly very
briefly. The LEDs light-up going around and around since they are mounted in a circle
(on a CD), then they pause....(electronic design added 6/07)
90 MHz voltage controlled oscillator for FM Band - Notice the abundance of
2N4401, 1 k resistors and 330 Ohm resistors? That's because I have a lot of each.
2N4401's weren't intended to be used as varactors, but they work just fine. Don't be
afraid to xperiment with the parts you have on hand. Build this on a ground plane
board. Layout is important..(schematic / circuit added 6/07)
