BradtheRad
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Today, 04:13H-bridge sends full supply power through series LC. Waveform is sine-shaped. Sense resistor automatically detects LC resonant frequency, by detecting...3 replies | 129 view(s) -
Yesterday, 14:52BradtheRad replied to a thread Problem with Logitech Audio PCB (No Sound Output) in Hobby Circuits and Small Projects ProblemsI'm looking at the 0V readings at pins 5 through 10, on IC#2. That can't be normal. IC#1 gives 0V only at pin 9 which is labelled ground.29 replies | 1416 view(s)
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Yesterday, 05:03Your schematic is common-base operation of a transistor. Its characteristics are: * low input impedance * high output impedance * high gain. By...7 replies | 239 view(s)
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21st August 2019, 12:33BradtheRad replied to a thread Halogen Lamp Limit Resistor? in Service Manuals, Requests, Repair TipsAlthough 10W is calculated dissipation, nevertheless it's wise to make your resistor rated for higher than that. Consider putting several one ohm...15 replies | 415 view(s)
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21st August 2019, 02:37Your query is suitable to post in a regular forum. There it is likely to get replies from our daily regular experts. These group discussions seem...2 replies
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21st August 2019, 02:12BradtheRad replied to a thread Halogen Lamp Limit Resistor? in Service Manuals, Requests, Repair TipsThis article on halogen bulbs points out ways they are different from normal incandescents. (Halogen type has a cycle of filament metal being...15 replies | 415 view(s)
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20th August 2019, 05:02Please find0 replies | 172 view(s)
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19th August 2019, 13:10BradtheRad replied to a thread Halogen Lamp Limit Resistor? in Service Manuals, Requests, Repair TipsAs Brian says, it's more efficient to pulse the headlight. Nevertheless it's interesting to figure out how to achieve the resistive drop. To send...15 replies | 415 view(s)
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19th August 2019, 03:40BradtheRad replied to a thread Multiple AC inputs relay (light PLC) in Elementary Electronic QuestionsThis can be done by putting resistors inline with the input signals. The weighting proportions are achieved by making differing ohm values. Mix them...5 replies | 214 view(s)
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17th August 2019, 22:32It's an idea worth some experimentation. Or to have a potentiometer choose how much comes from a capacitor and how much from an inductor. This...10 replies | 545 view(s)
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16th August 2019, 22:00BradtheRad replied to a thread High power efficiency oscillator topologies? in RF, Microwave, Antennas and OpticsSorry, I wasn't certain as to what waveform you want. This sine wave oscillator has a resonant current loop based on two capacitors and one inductor....14 replies | 443 view(s)
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16th August 2019, 12:55BradtheRad replied to a thread High power efficiency oscillator topologies? in RF, Microwave, Antennas and OpticsMultivibrator, frequency depends on capacitor value. 6pF yields 130 MHz. Output transition is a few volts. Draws about 1mA from 3V supply. ...14 replies | 443 view(s)
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16th August 2019, 06:45By installing a capacitor between the two sources, rapid zero-crossings are detectable. The capacitor produces spikes. However it may also produce...8 replies | 398 view(s)
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15th August 2019, 12:17I do loadpull for the main amplifier at two points: 1. Just before the peaking amplifier turns on and begins to significantly do "load modulation". ...5 replies | 348 view(s)
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15th August 2019, 07:47Install a resistor between the two sources. One source becomes ground for the other source. Measure voltage across the resistor to read differential...8 replies | 398 view(s)
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15th August 2019, 00:04BradtheRad replied to a thread How to add the outputs of a different voltage double ciruits in Analog Circuit DesignRework one circuit so it outputs negative polarity. Connect your load across the two outputs. This method works if the two ground icons represent a...3 replies | 229 view(s)
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14th August 2019, 07:12By adding an inductor to the capacitor, attenuation is not as severe. Because you don't have a resistor involved. For 1-30 MHz range an inductor...10 replies | 545 view(s)
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14th August 2019, 01:04BradtheRad replied to a thread Difference between Differentiators and Comparators in Elementary Electronic QuestionsA differential detector is the input stage of a comparator. A differentiator performs a calculus function, differentiation. Its the counterpart of...3 replies | 163 view(s)
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13th August 2019, 06:17vivekroy replied to a thread How to increase high frequency output power in RF, Microwave, Antennas and OpticsThe curve that circuitking has shared shows a very wide region of operation. Obtaining matching across such a wide range is quiet difficult....5 replies | 266 view(s)
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13th August 2019, 04:15BradtheRad replied to a thread How to increase high frequency output power in RF, Microwave, Antennas and OpticsCan this be solved by impedance matching? Normally that is associated with the goal to maximize power transfer. Input arrives as a combination of...5 replies | 266 view(s)
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13th August 2019, 02:44BradtheRad replied to a thread [SOLVED] voltage and current waveforms spark gap in Elementary Electronic QuestionsFor an example of unusual waveforms in Tesla coils, there's the kind that sings: "Dueling Banjos on musical Tesla Coils"9 replies | 416 view(s)
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12th August 2019, 16:46vivekroy replied to a thread How to increase high frequency output power in RF, Microwave, Antennas and OpticsCan you maybe elaborate on what you mean by "high frequency output power"? If you are referring to higher power at high frequency, then inductive...5 replies | 266 view(s)
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12th August 2019, 16:42vivekroy replied to a thread Using VCVS as delay elements result in period signal rising and falling time changing in Analog Integrated Circuit (IC) Design, Layout and FabricationHave you tried changing the maxstep parameter in your transient simulation?2 replies | 325 view(s)
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12th August 2019, 09:40The ratio of L:C plays a big part in performance. It's not necessarily easy to calculate what ratio is optimum in your application. Ohmic...2 replies | 208 view(s)
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12th August 2019, 09:28A big challenge is to open the housing and find out how to activate the internal switch. Then you must attach wires (very thin gauge) going to your...5 replies | 332 view(s)
About BradtheRad
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- Born 1953. Some college.
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