Latest threads in Hobby Electronics Basicsshow only best voted threads

Subject Author Posted Replies
 
Methinks Our Dunces Protest Too Much
155 John Larkin Jan 10 156 Tom Del Rosso Jan 10 157 John Fields Jan 10 158 John Larkin Jan 10 159 Michael A. Terrell Jan 10 160 John J Jan 10 161 John Fields Jan 10 162 John J Jan 10 163 Tom Del Rosso...
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Understanding electrical contacts - inkjet cartridges
Hi, I would like to understand the electrical contacts that form a part of inkjet cartridges. Any technical references appreciated Special interest Lexmark 4, 5 Thanks
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Can you make a dynamometer from a partciular kind of motor/generator?
I suppose if you couple a motor to a generator and load the generator, that will load the motor so the generator could be used to make a dynamometer?
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Caps to reduce noise
Hi All I=92ve seen that everybody put a 0.1uF Capacitance and some other a 0.01uF and a 0.1uF Capacitance near each IC in their board to reduce noise. But I=92ve never seen an article that discusses...
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Shelf life of LiON batteries?
I recently bought a digital camera. It's very nice! The salesweasel at Best Buy was explaining that most cameras they make these days will last a good long time, but the reason that most people buy...
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difference
I have two voltmeters.. one DC voltmeter and one AC voltmeter.. how would you differentiate it without opening the apparatus...?? that is just by seeing it.....
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Help to understand opamp compensation
I've found this interesting lecture but i don't understand open loop gain with resistor series capacitor as fig. 6.15 opamp's open loop gain is represented: it is calculated (i think) at node Vout of...
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req: help to wire a 1phase ac motor
Hi, I would appreciate help in wiring a 1 phase AC motor. I tried getting a diagram but couldn't find any for this motor. Here's what I know: -3 leads coming out (red, blue, black) -2 visibly...
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Wireless Non-Radiative Energy Transfer = scalar wave transmission
Hi all, The description of Wireless Non-Radiative Energy Transfer by Marin Soljacic et al uses something called 'evanescent fields' to transfer power. Are these evanescent fields the same as the...
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Low-power transformer - and other stuff
Hi, As part of a bathroom project, I want more sophisticated control of the extractor fan than just turning it on with the overhead light. At present, I'm thinking in terms of a flow-switch on the...
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Substituting Lexmark's No 4 and 5 Cartridges
Hi, Lexmark's cartridges are expensive. Has anyone found other cartridges that will fit and run the Z 2390 printer? Thanks Ps. Am I right in thinking that substitute cartridges would need a universal...
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AC adapter question
Sorry if this is the wrong place to ask this. I bought an electronic item in the US but I live in England. I bought the AC adapter for English version of the same piece of kit, which has exactly the...
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transformers
hey guys ! Does anyone know of an individual or a small company that can wind for me 1 torodial transformer to test and if it works well , I will need 3 more. ??? Total of 4 . This is for a experiment...
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how to test a quadrac out of circuit?
I have a 6015LT-ND quadrac that I would like to test out of circuit. Is this possible and how would I do it with a simple DVM? Thanks, Bill
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Low Power Triangulation Circuits
Hello, What I would like to do: Capture motion (not specifically human motion) in a room that is about 3*3*3 meters. The system should be able to capture 16 'active' points in said room. What I...
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