Archive for the ‘Building projects and kits’ Category:

2024-03-11 Flexible LED Filaments

Some information on what current and resistors to use.  The LEDs are all in parallel and need about 3 Volts, current limited with a resistor. https://www.facebook.com/reel/909951727389682?mibextid=9drbnH&s=yWDuG2&fs=e

2024-03-10 Radio Shack P-Box List, Assembly Manual, Schematic Info

This seems to be pretty much all of the kits. http://my.core.com/~sparktron/pbox.html

2024-03-09 Big Clive’s Old Tungsten Roadwork Beacon – Barricade Flasher

I built this “tungsten roadwork beacon” as Clive calls it, using the parts given in my schematic (photo below). I didn’t have a 6V, 90 mA lamp, so I simulated it by using three 20 ohm, 1/4 Watt resistors in series, which gives 60 ohms and 100 mA load with 6VDC.  For an indicator I

(Read More…)

2024-03-08 Some Rube Goldberg Inventions That Could Make Some Cool Projects

Mostly wood.  Short video. https://www.facebook.com/reel/1099537448068091?mibextid=9drbnH&s=yWDuG2&fs=e

2024-03-08 FWBR Ripple Calculator Online

This may be helpful when choosing the amount of capacitance for a certain unregulated AC power supply – the kind that uses an old fashioned transformer.  It calculates one variable given the others. https://www.chipbuilder.com/full-wave-power-supply-ripple-calculator.html

2024-04-06 The Flexible LED Filament

This YouTube short demos a flexible LED filament and shows how to configure it for 5VDC.

2024-03-01 Innovative Dome Shaped Homes In S. Dakota

Dome shaped homes use cellular concrete 20% with 80% air, which makes it a good insulator.  In the Pine Ridge Reservation in S. Dakota.  They founded “In Our Hands” non-profit.  Short video. https://www.facebook.com/reel/1889790898142946?mibextid=9drbnH&s=yWDuG2&fs=e

2024-02-22 Building A LiFePO4 Battery

A YouTube short of a 12V 315Ah LiFePO4 battery being assembled. I wish I could find out what the background music is.

2024-02-21 Website for Electronics – Very Comprehensive

This very comprehensive electronics website has many projects with useful devices.  This example project is a transistor curve tracer.  Go to the index and look at the many, many links.  It seems to be at the ETH in Switzerland but some of the words are in ?Thai? https://www.changpuak.ch/electronics/Curve_Tracer_advanced.php#

2024-02-17 BJT, FET Curve Tracer

This very comprehensive website has a transistor and FET Curve tracer.  Also a simpler curve tracer for all components.  Click on box to download the schematic, etc. https://www.changpuak.ch/electronics/Curve_Tracer_advanced.php#

© RustyBolt.Info/wordpress
CyberChimps