What we have today are not Fairly Expensive Tortillas or Fortunately Edible Theremins, but Field-Effect Transistors. If you know what it is, I will leave you to explore: 1RFZ44N N-Channel FET $2.50 The IRFZ44N is a very powerful useful N-Channel FET, with only 0.0175ohms resistance pushing 20 amperes at 5V! FQP27P06 P-Channel FET $0.95 A […]
Solar Eclipse at SB
Solar botics
August 21, 2017
Today August 21, 2017, we were treated to about 80% solar eclipse. In spite of the smoke, the weather cooperated so we couldn't miss this event.
Pinhole projector boxes were made out of cereal and shipping boxes:
Fancy ones were mounted onto a tripod, and a phone camera recording a time lapse video was taped to the box:
And the huge walk-in pinhole projector was great:
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New Product: Motors & Driver
28BYJ-48-16 16:1 Stepper Gearmotor $5.85 Originally designed for control of HVAC vanes and similar low-demand equipment, these stepper-motor gearboxes have lots of hacking potential. This is the lower torque / higher speed 16:1. 28BYJ-48-64 64:1 Stepper Gearmotor $5.85 Originally designed for control of HVAC vanes and similar low-demand equipment, these stepper-motor gearboxes have lots of […]
GM15 Nano Robot Sumo
We've had some requests about our own demo Nano robot sumo "BittyBad", which uses a pair of GM15 gear motors. On the GM15 detail page, you'll see a picture of it! It features 2 GM15 gear motors, two 90mA/h LiPoly 3.7V batteries (in series), two "ProxDots" objects sensors, a pair of edge-sensors and a (gasp!) […]
Heated Car Seat Teardown and Repair
Here's a little makeover of an inexpensive aftermarket car seat heating pad that stopped working. Designed to activate and warm up when sat upon, the electronics face a fair amount of abuse: since the seat is a soft frame, the wires inside constantly move and flex with the body. They are also subject to harsh […]
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Warning: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
Please visit www.P65Warnings.ca.gov for more information. This item was manufactured prior to August 31, 2018.