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IRF510 amplifier failures
One other possibility to consider to protect against overcurrent situations is to use a current limiting power supply, or add a current limiter to an existing power supply or battery. The current limi
One other possibility to consider to protect against overcurrent situations is to use a current limiting power supply, or add a current limiter to an existing power supply or battery. The current limi
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Jim, N5IB
· #40320
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Creating Gerber files for pcb construction
I visited the EasyEDA site this morning and noticed they have changed the portal for submitting gerbers for fabrication. It now brings you to a JLCPCB page with a gerber viewer that is different from
I visited the EasyEDA site this morning and noticed they have changed the portal for submitting gerbers for fabrication. It now brings you to a JLCPCB page with a gerber viewer that is different from
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By
Jim, N5IB
· #40231
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Creating Gerber files for pcb construction
Hi Gordon, No - that ExpressPCB file will not be acceptable to most manufacturer's who require gerbers. The Gerber/Excellon format is a very specific industry standard method for specifying automated
Hi Gordon, No - that ExpressPCB file will not be acceptable to most manufacturer's who require gerbers. The Gerber/Excellon format is a very specific industry standard method for specifying automated
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By
Jim, N5IB
· #39307
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#ubitx-help advice needed-display issue
#ubitx-help
It may be a poor contact issue between the actual LCD panel and its driver board. I noticed it on a similar display here While the display is powered up, try squeezing the LCD portion of the display u
It may be a poor contact issue between the actual LCD panel and its driver board. I noticed it on a similar display here While the display is powered up, try squeezing the LCD portion of the display u
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By
Jim, N5IB
· #39185
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uBITX woes, feeling disheartened.
#ubitx
Here's what I get if I draw out the relay pinouts (attached) N5IB
Here's what I get if I draw out the relay pinouts (attached) N5IB
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By
Jim, N5IB
· #38438
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uBITX woes, feeling disheartened.
#ubitx
For the relays, think of them as a 16 pin DIP package, but with some pins not used. The pin numbers on the uBITX schematic can be used to draw up the pinout on a 16 pin array. Pins 2,4,67 on one side,
For the relays, think of them as a 16 pin DIP package, but with some pins not used. The pin numbers on the uBITX schematic can be used to draw up the pinout on a 16 pin array. Pins 2,4,67 on one side,
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By
Jim, N5IB
· #38437
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W0EB's Keying Adapter
The principal problem is that A6 and A7 can not be used as digital pins. Now, since the level detecting keyer scheme sorta works on A6, why not use A7 to do the same sort of thing, but to implement th
The principal problem is that A6 and A7 can not be used as digital pins. Now, since the level detecting keyer scheme sorta works on A6, why not use A7 to do the same sort of thing, but to implement th
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By
Jim, N5IB
· #38436
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Raduino logic levels
Ah ha !! TWEN... that's the info I was looking for... Thanks for the heads up. Now I can sleep at night again - and put the scope probes away :^)) Jim, N5IB From the ATMEGA328datasheet: • SCL/ADC5/PCI
Ah ha !! TWEN... that's the info I was looking for... Thanks for the heads up. Now I can sleep at night again - and put the scope probes away :^)) Jim, N5IB From the ATMEGA328datasheet: • SCL/ADC5/PCI
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By
Jim, N5IB
· #37669
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Raduino logic levels
A bit more digging into the datasheets for the ATMEGA328 and the Si5351a... The I2C bus SCL and SDA pins of the NANO (A5 and A4) are part of the ATMEGA's "Port C" general purpose I/O. When used as a d
A bit more digging into the datasheets for the ATMEGA328 and the Si5351a... The I2C bus SCL and SDA pins of the NANO (A5 and A4) are part of the ATMEGA's "Port C" general purpose I/O. When used as a d
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By
Jim, N5IB
· #37638
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Raduino logic levels
New to the BITX community, but have had some Arduino/DDS projects in the portfolio, and while awaiting my rig have been doing dangerous and foolhardy things - reading manuals and schematics - hi Notic
New to the BITX community, but have had some Arduino/DDS projects in the portfolio, and while awaiting my rig have been doing dangerous and foolhardy things - reading manuals and schematics - hi Notic
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By
Jim, N5IB
· #37581
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