BradtheRad
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Today, 08:36Simulation of method described in posts 2 & 3. Uses 1mF capacitors (as in your schematic), and loads 25 ohms because too much current draw pulls the...6 replies | 93 view(s) -
Today, 07:28BradtheRad replied to a thread Car battery STARTER voltage help (not charger) using variety of methods (possibly AC) in Hobby Circuits and Small Projects ProblemsThere are the less expensive 'car battery boosters' which plug in to the cigarette lighter, and which no doubt are rechargeable batteries. I imagine...10 replies | 139 view(s)
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Today, 03:43BradtheRad replied to a thread Different connections to Common node in differential pair in Analog Integrated Circuit (IC) Design, Layout and FabricationThe long-tail pair is supposed to operate so that an increase in one transistor conducting results in the other transistor decreasing (and...4 replies | 92 view(s)
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23rd June 2019, 20:13BradtheRad replied to a thread Using Patent Ideas for Next Product in Elementary Electronic QuestionsA patent might be renewed by the owner. You should verify whether that was done. Also, whether someone made (perhaps minor) modifications to the...6 replies | 204 view(s)
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23rd June 2019, 04:27BradtheRad replied to a thread Energy harvest circuit questions in RF, Microwave, Antennas and OpticsAh-hum, well, you never know who's putting out a strong signal on the airwaves at what frequency these days. It would be interesting to tune the...6 replies | 189 view(s)
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22nd June 2019, 22:39Article about voltage doubler claiming it makes efficient optimum use of a transformer: 'A genuine full wave voltage doubler.' ...38 replies | 1628 view(s)
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22nd June 2019, 22:11Here is my auto-biasing arrangement. H-bridge with 20 VDC supply, clock signal consists of 5v pulses biasing N-devices (low side). The P-devices...13 replies | 249 view(s)
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22nd June 2019, 18:53BradtheRad replied to a thread Energy harvest circuit questions in RF, Microwave, Antennas and OpticsYour schematic resembles an old-fashioned 'crystal' radio receiver. It draws its power from the radio broadcast itself. No other power supply is...6 replies | 189 view(s)
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21st June 2019, 06:23BradtheRad replied to a thread High Frequency operation of Three level DC/DC Converters in Power ElectronicsPost #1 schematic needs for the join between VD5 & VD6, to be connected to the join of the capacitors at the left. Then it becomes 3-level diode...7 replies | 204 view(s)
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21st June 2019, 02:57That is liable to knock out something in your tv. Do your living units get a tv broadcast feed from an amplified distribution system? Perhaps that...7 replies | 227 view(s)
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20th June 2019, 07:55This sounds as though it lost all saved channels and lost the ability to detect broadcasts. Hook up a vcr or other device (example, rf modulator)...7 replies | 227 view(s)
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20th June 2019, 05:32BradtheRad replied to a thread Opamp Layout Example in Analog Integrated Circuit (IC) Design, Layout and FabricationThings to try: * Sometimes you can navigate to a higher page by shortening the url -- that is, by deleting characters to the right of a slash. ...1 replies | 151 view(s)
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20th June 2019, 01:14There are: a) ohmic (or DC) resistance of the wire b) reactive impedance resulting from Henry value and frequency c) load on the secondary winding...2 replies | 141 view(s)
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18th June 2019, 23:23A single pot can do this job. The resistors are unnecessary if some input resistance is in place to prevent high current through the pot to...4 replies | 256 view(s)
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18th June 2019, 06:29Webpage discussing clocks which synchronize to radio signals (including CHU, WWV, GPS): www.tldp.org/HOWTO/Clock-4.html7 replies | 265 view(s)
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17th June 2019, 00:50BradtheRad replied to a thread How to make cluster computer with MSI desktop and MSI laptop in General ComputerOnly if you're lucky will you find a program which works with your computers and OS. Link to site describing various projects. ...3 replies | 449 view(s)
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16th June 2019, 23:31BradtheRad replied to a thread UA78M33CDCY 3,3 volt regulator will not regulate at input voltage above 12 volt... in Analog Circuit DesignThere is always this ordinary voltage regulator made from an NPN and zener diode. The zener can be a string of led's and/or diodes. It can even...15 replies | 422 view(s)
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16th June 2019, 03:25Files less than 500kB are more likely to get through the upload routine. This is not a rigid rule but a glitch during upload could cause the system...13 replies | 488 view(s)
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15th June 2019, 23:32Nowadays the 'Insert Image' icon seems to be the reliable method. Once your image uploads successfully, submit your message within a minute or...13 replies | 488 view(s)
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15th June 2019, 19:01BradtheRad replied to a thread How to make cluster computer with MSI desktop and MSI laptop in General ComputerCan you find (or write) software that simply sends and receives data via USB at each computer? If you can gain control over such communication then...3 replies | 449 view(s)
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14th June 2019, 05:23Shortcircuit protection circuit - post#15 ] A few years ago forum administrators decided it was too easy for any spammer to post a message, then...4 replies | 356 view(s)
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13th June 2019, 14:20Is your initial power source 12V? If so then the step-up ratio is 2 which leads to the option of a voltage doubler based on capacitors. This...12 replies | 452 view(s)
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11th June 2019, 07:17Buck converter controlled by transistors. NPN & PNP arranged as a sziklai pair. They provide high gain, resulting in snap action. The waveform...5 replies | 257 view(s)
About BradtheRad
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- Born 1953. Some college.
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