betwixt
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Yesterday, 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...6 replies | 188 view(s)
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Yesterday, 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 | 100 view(s)
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Yesterday, 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 | 89 view(s)
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Yesterday, 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 | 101 view(s)
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Yesterday, 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 | 100 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 | 110 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 | 1032 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...11 replies | 241 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...101 replies | 3853 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...6 replies | 188 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 | 407 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 | 114 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 | 159 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 | 213 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 | 325 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 | 325 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 | 177 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 | 362 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 | 185 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 | 420 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 | 420 view(s)
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12th July 2019, 22:43betwixt replied to a thread Dirty circuit board causing failure in Service Manuals, Requests, Repair TipsDesoldering wick is probably the best thing to use for that kind of component. The best temperature depends on the kind of solder you use. The older...11 replies | 420 view(s)
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12th July 2019, 19:08betwixt replied to a thread Dirty circuit board causing failure in Service Manuals, Requests, Repair TipsYou only use hot air for soldering/unsoldering surface mount components (SMD) but all the parts on that board are "through hole" so conventional...11 replies | 420 view(s)
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12th July 2019, 16:46betwixt replied to a thread Dirty circuit board causing failure in Service Manuals, Requests, Repair TipsAll that board holds is a volume control, a switch, an LED and an input jack socket. The switch sends a power signal back to the speakers and also...11 replies | 420 view(s)
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12th July 2019, 14:52betwixt replied to a thread Soldering on Battery Terminals in Service Manuals, Requests, Repair TipsSpot welding uses far less overall heating power. It is intense but only for a very short period. Soldering requires the surface to heat up to...9 replies | 325 view(s)
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12th July 2019, 14:45betwixt replied to a thread copper pour in top layer with vcc net in PCB Routing Schematic Layout software and SimulationTechnically, if you flood with VCC, as far as signals see it the situation is the same as flooding with GND as they should be at the same signal...7 replies | 483 view(s)
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12th July 2019, 10:36betwixt replied to a thread copper pour in top layer with vcc net in PCB Routing Schematic Layout software and SimulationWe have no idea of the design of your controller or the exact PCB layout but in general, there are no reasons why you can't use any layer for any...7 replies | 483 view(s)
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12th July 2019, 09:09We can't answer that without knowing how the coin acceptor identifies the kind of coin inserted. It must produce some different signal depending on...3 replies | 179 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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