betwixt
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Today, 11:19betwixt replied to a thread Hand soldering a 6x6mm QFN (28pin) in Hobby Circuits and Small Projects ProblemsUse "ULS" (UltraSolve) from Electrolube, Farnell sell it. It is expensive but I find a 1 litre bottle lasts me for about a year of flux cleaning. ...10 replies | 232 view(s)
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Today, 09:06With R4, R9 and R13 replaced with a link it should work. As the schematic showed it, might have worked but the highest voltage you could get on U1...24 replies | 822 view(s)
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Yesterday, 14:40Use two screened cables, ground the shields and use the inners one to each channel. in your present configuration, not only is there a risk of...98 replies | 2508 view(s)
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Yesterday, 12:08betwixt replied to a thread ESP8266EX based wifi module does not respond on any AT commands ( E103-W01-IPX) in IoT - Internet of ThingsDon't expect miracles from Arduino IDE and it has almost no debugging facilities but it is easy to use and yes, it is cross platform for Linux, OSX...11 replies | 381 view(s)
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Yesterday, 11:58Better: Don't use a BNC for a balanced input, it implies the use of screened cable which will inevitably have more capacitance to the outside World...98 replies | 2508 view(s)
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Yesterday, 09:16betwixt replied to a thread ESP8266EX based wifi module does not respond on any AT commands ( E103-W01-IPX) in IoT - Internet of ThingsYes, it will work with either a conventional RS232 serial port (with voltage level conversion of course) or a USB serial port, you choose which in...11 replies | 381 view(s)
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Yesterday, 08:58Normally the reason for using any amplifier is to magnify the amplitude of a signal so it is large enough to be usable. It wouldn't therefore be...4 replies | 138 view(s)
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Yesterday, 08:49betwixt replied to a thread Hand soldering a 6x6mm QFN (28pin) in Hobby Circuits and Small Projects ProblemsYour board doesn't have a connection to the center pad anyway! Assuming this is for test/prototyping and not a production run, I would opt for hot...10 replies | 232 view(s)
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19th July 2019, 23:27betwixt replied to a thread ESP8266EX based wifi module does not respond on any AT commands ( E103-W01-IPX) in IoT - Internet of ThingsI suggest you download Arduino IDE, even if you don't use it normally. It includes a flash utility via a serial or USB serial port and it will...11 replies | 381 view(s)
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19th July 2019, 22:4027MHz crystal osc, NE555 or similar to produce the pulses, use the pulses to bias the 27MHz oscillator. That's how almost all ASK transmitters work....8 replies | 179 view(s)
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19th July 2019, 21:31...but most ESP32 modules are 1.27mm pitch. Half of standard 0.1 inch spacing. If the module is on a board with USB interface and PSU, it is...3 replies | 165 view(s)
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19th July 2019, 15:59My i7 has 8 cores. I don't think Nvidia give technical information about their hardware but I'm sure they don't have a general purpose instruction...4 replies | 221 view(s)
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19th July 2019, 11:14Agreed - lots more information needed. I have only once seen this happen and it was due to a UEFI 'lock' in the BIOS that prevented anything but...3 replies | 124 view(s)
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18th July 2019, 20:56The input current is specified at 1.35mA with 3.85V applied. That means to drop the additional (24 - 3.85) = 20.15V at the same current, Ohms Law...2 replies | 128 view(s)
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18th July 2019, 16:03betwixt replied to a thread Help in diode code v6 12 Panasonic Plasma TH-P42X30D in Service Manuals, Requests, Repair TipsI've attached the schematic. Unfortunately, it doesn't list the part numbers and I can't read the board references clearly except D104. As it seems...6 replies | 1045 view(s)
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18th July 2019, 15:22You want the PWM to stay running when the power is removed? That will never happen, your best option is to move the PWM source to the plant end...12 replies | 331 view(s)
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18th July 2019, 15:14betwixt replied to a thread how to design a thermostat without Microcontroller? in Analog Circuit DesignC1 or a second one in parallel with it should be DIRECTLY across the supply pins of U2 and preferably across the LM35 as well. When dealing with...103 replies | 3979 view(s)
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18th July 2019, 08:45betwixt replied to a thread ESP8266EX based wifi module does not respond on any AT commands ( E103-W01-IPX) in IoT - Internet of ThingsThe short flash indicates it is initializing properly. Visually, it looks like the many other ESP8266 16-pin modules and I would be very surprised...11 replies | 381 view(s)
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18th July 2019, 08:35betwixt replied to a thread Wireless door bell Sender not working in Hobby Circuits and Small Projects ProblemsI live on the coast with constant seawater nearby and in an area of very high rainfall, I have never had problems with corrosion. If the LED on...8 replies | 425 view(s)
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17th July 2019, 14:59You need a "disassembler", a program that reverse engineers the bytes back to their corresponding instructions. If your file is in .hex format (a...2 replies | 132 view(s)
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16th July 2019, 09:29It seems the initial code (the bootloader) is being loaded but from there it either isn't configuring the SRAM interface pins or it isn't starting...4 replies | 166 view(s)
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15th July 2019, 22:13betwixt replied to a thread Klystron output voltage, cavity field strength in RF, Microwave, Antennas and OpticsThis is such a specialized field that I doubt may people would have experience to share. You are probably more likely to get answers by contacting a...2 replies | 217 view(s)
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15th July 2019, 22:06betwixt replied to a thread Soldering on Battery Terminals in Service Manuals, Requests, Repair TipsConductive epoxy is loaded with silver powder, not graphite. It can provide very low resistance connections but as it contains real metallic silver...9 replies | 347 view(s)
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15th July 2019, 15:10betwixt replied to a thread Soldering on Battery Terminals in Service Manuals, Requests, Repair TipsNo, but it is an alternative that doesn't risk the danger of soldering directly to the battery. Spot welding is probably the best solution if you...9 replies | 347 view(s)
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14th July 2019, 19:13betwixt replied to a thread LNK304 input voltage below the datasheet minimum value...damage? in Power ElectronicsI can't see anything in the data sheet that suggests damage will occur but running it below specified input might have consequences on the regulated...1 replies | 187 view(s)
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14th July 2019, 15:16betwixt replied to a thread Tuning of varicap diode in a magnetic loop antenna based on modulating signal in RF, Microwave, Antennas and OpticsAFC was (until PLL came along) used extensively to keep receiver local oscillators tracking an incoming signal. For receiving, there would be little...7 replies | 375 view(s)
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14th July 2019, 08:43The transformer (converter) should have a rating HIGHER than the console so you are OK. What Barry is saying is there is only at most 3W safety...4 replies | 192 view(s)
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13th July 2019, 22:16betwixt replied to a thread Dirty circuit board causing failure in Service Manuals, Requests, Repair TipsNo, the braid removes the solder by capillary action. The fine spacing between the wires in the braid causes a meniscus to form in the gaps and it's...11 replies | 442 view(s)
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13th July 2019, 09:14betwixt replied to a thread Dirty circuit board causing failure in Service Manuals, Requests, Repair TipsI think we all know point 3 from personal experience :???: Well done for getting it going. If you want to replace the switch, keep the original...11 replies | 442 view(s)
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PLEASE - no friends requests or private emails, I simply don't have time to reply to them all.
It's better to share your questions and answers on Edaboard so we can all benefit from each others experiences.
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