Latest threads in General Electronicsshow only best voted threads
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Testing a pm dc motor
180 vdc, 1 hp, pm motor. with dmm what should be the first tests? motor is in a difficult location to examine visually so i'd like to start with electrical evaluation. it measures 1.2 ohms between the...
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8 years ago
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Looking for a schematic/suggestions
The goal: A power supply that outputs a solidly regulated +5.0VDC at 500+mA under load, fed from a ridiculously variable input supply - basically anything that can feed it enough juice to give the...
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8 years ago
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Op-amp differential amplifier
Op-amp differential amplifier has much wider range of input signals comparing to differential amplifier with discrete components. Read more: and also simulate:
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8 years ago
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CATV RF Notch Filter
Hi, I am looking for a source where I can buy an RF notch filter for CATV. One source I found via Google is I sent an email to Later that same day, I received a reply!!! In the reply I was asked for...
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8 years ago
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Of battery terminals & grease
There are some members of electronic forums that suggest coating automotive battery posts with grease ("any king--axle, lithium, copper") before attaching cable-end clamps to the posts and swear that...
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8 years ago
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Comcast Digital Cable Frequencies Chart
Hi, I did a Google search for Comcast digital cable frequencies spectrum chart ("comcast digital cable"+"frequecies spectrum" and I tried "comcast digital cable"+"frequencies chart"), but it did not...
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8 years ago
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Relaxation Oscillator as a perfect example of regenerative feedback
Relaxation Oscillator circuit is a perfect example of regenerative feedbac k that is special case of positive feedback. Simple and efficient, this cir cuit is practical for students labs and still...
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8 years ago
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DC-DC converters basic topologies online simulations
DC-DC converters are essential power supply circuits for modern electronic equipment today. Five basic topologies are ready now for online simulation. Visit them on:
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8 years ago
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Use Fitbit Offline
Hello, everyone. One of my Xmas gifts was a Fitbit Flex wristband. I haven't set it up yet but it appears you must go online to do this. I absolutely don't like being tied in to a website to use the...
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8 years ago
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Glass Capacitors & Tantalum Capacitors for Sale
Glass Capacitors & Tantalum Capacitors for Sale Richard Maxwell (818)399-1158 text your message or call me or
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8 years ago
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Lithium battery capacities (18650).
Having discovered that recycling bins in various shops are a good source of lithium battery packs that can be put to various uses, I notice quite a spread in claimed Ah capacities on the information...
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8 years ago
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New Article
Hi ! I have published an article about the old 186. You can find it under my home-page at See you Dario Tratzi
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8 years ago
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Differential Amplifier is an input stage of every op-amp
Generally, if input stage of an operational amplifier is realized as BJT tr ansistor differential amplifier, op-amp has smaller slew rate, smaller volt age offset and better CMRR. If it's realized as...
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8 years ago
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Op-amp voltage offset cancellation
Combination of one fast op-amp with large slew rate and large voltage offse t with one op-amp with small slew rate and small voltage offset and low pas s filter can be used for amplification input AC...
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8 years ago
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Current mirror
Current mirror is inevitable part of input stage of operational amplifiers. Current mirror behaves almost as perfect current source in small current signals application and it has excellent...
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8 years ago
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