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Stepper driver model for focuser
#on-focus
These devices came on the market to deal with missing steps that mainly affected the DVR8825. They were called "smoothers." As such they sold for about $2. The introduction of the TMC2130 sort of deal
These devices came on the market to deal with missing steps that mainly affected the DVR8825. They were called "smoothers." As such they sold for about $2. The introduction of the TMC2130 sort of deal
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George Cushing
· #30829
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Stepper driver model for focuser
#on-focus
I'd read that as "OFF" for any A4988 Pololu type driver. Beyond ground, logic and motor supply only step and direction pins are used. Driver selection depends to a great extent on the characteristics
I'd read that as "OFF" for any A4988 Pololu type driver. Beyond ground, logic and motor supply only step and direction pins are used. Driver selection depends to a great extent on the characteristics
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George Cushing
· #30808
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MaxESP3 footprints
Seems everyone in China is selling these. Most are mirror of the standard mounting (Type 2) and the positioning lugs are not the proper distance from the pins for OnStep PCBs. The Adam Tech MTJ-669X1
Seems everyone in China is selling these. Most are mirror of the standard mounting (Type 2) and the positioning lugs are not the proper distance from the pins for OnStep PCBs. The Adam Tech MTJ-669X1
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George Cushing
· #30806
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#EQ5
#EQ5
For some idea of what's involved in assembly of the MaxESP3 and the MiniPCB2, currently the best selling controller kits follow the link.
For some idea of what's involved in assembly of the MaxESP3 and the MiniPCB2, currently the best selling controller kits follow the link.
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George Cushing
· #30805
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Weird One
I will help the "handicapped" and have a soft spot for folks with dead Vixen DD-2/3s or Losmandy 492s. The MiniPCB2 is my favorite controller model for this kind of project. It's compact so there's no
I will help the "handicapped" and have a soft spot for folks with dead Vixen DD-2/3s or Losmandy 492s. The MiniPCB2 is my favorite controller model for this kind of project. It's compact so there's no
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By
George Cushing
· #30694
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MaxESP3 footprints
Sounds like you have RJ12s that are designed for fitting under the PCB. I bought a box of 500 for $10 a few years ago and used them in projects. Wasn't until I tried to use them on a OnStep PCB that I
Sounds like you have RJ12s that are designed for fitting under the PCB. I bought a box of 500 for $10 a few years ago and used them in projects. Wasn't until I tried to use them on a OnStep PCB that I
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By
George Cushing
· #30693
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RA and DEC cables?
You can purchase braided cable sleeving to neaten things up. I've found that surface mount solder paste in a syringe mages soldering DIN and aircraft connecters is a lot easier. A dab of paste in the
You can purchase braided cable sleeving to neaten things up. I've found that surface mount solder paste in a syringe mages soldering DIN and aircraft connecters is a lot easier. A dab of paste in the
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By
George Cushing
· #30461
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RA and DEC cables?
A source I use is old Centronics type printer cables. Good gauge and tinned throughout. Newer cables are OK for data but too light for anything that has to carry current.
A source I use is old Centronics type printer cables. Good gauge and tinned throughout. Newer cables are OK for data but too light for anything that has to carry current.
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By
George Cushing
· #30460
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MaxESP3 esp32s wifi config.
The plain vanilla D1 mini is fine without the metal enclosure. I think it is shielded because it uses a 4 cent Zener diode voltage regulator which can be noisy. Lolin apparently decided to go with a 1
The plain vanilla D1 mini is fine without the metal enclosure. I think it is shielded because it uses a 4 cent Zener diode voltage regulator which can be noisy. Lolin apparently decided to go with a 1
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By
George Cushing
· #30434
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MaxEsp3 capacitors C6,C7,C9,C10 and C11
On a Windows device ALT & 230 and 234 for Ω. Generally, ceramic caps carry a 3 digit code. Thus a 104 is 10+4 digits or 10000pF = 100nF = 0.1µF. I keep the attachment handy for reference.
On a Windows device ALT & 230 and 234 for Ω. Generally, ceramic caps carry a 3 digit code. Thus a 104 is 10+4 digits or 10000pF = 100nF = 0.1µF. I keep the attachment handy for reference.
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By
George Cushing
· #30433
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New MiniPCB2 build
First thing to be clear about is all the D1 mini Pros are assembled in China. There seem to be 3-4 basic board layouts. All use the ESP8266 microcontroller, a flash memory IC and a USB-serial interfac
First thing to be clear about is all the D1 mini Pros are assembled in China. There seem to be 3-4 basic board layouts. All use the ESP8266 microcontroller, a flash memory IC and a USB-serial interfac
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By
George Cushing
· #30315
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STM32 Black pill
For using the BT HC-05 this is a good reference https://www.gme.cz/data/attachments/dsh.772-148.1.pdf.
For using the BT HC-05 this is a good reference https://www.gme.cz/data/attachments/dsh.772-148.1.pdf.
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By
George Cushing
· #30308
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STM32 Black pill
Found this on Reddit: Here are my 3.3V and 5V rails with the Torex 150mA and then the exact same board with the AMS1117. Note: With the ME6211 500mA the 3.3V rail dropped 240mV and the 5V had almost n
Found this on Reddit: Here are my 3.3V and 5V rails with the Torex 150mA and then the exact same board with the AMS1117. Note: With the ME6211 500mA the 3.3V rail dropped 240mV and the 5V had almost n
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By
George Cushing
· #30307
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My OnStep ShieldESP for ESPDUINO-32 or WeMos (D1 or D2) R32 board
Brilliant! I'd say break through and original, but it's even more clever than that. You've found inspiration in the MiniPCB designs. Smarter not to re-invent the wheel! The R32 is generally limited to
Brilliant! I'd say break through and original, but it's even more clever than that. You've found inspiration in the MiniPCB designs. Smarter not to re-invent the wheel! The R32 is generally limited to
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By
George Cushing
· #30271
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MiniPCB2 guide/slew speed question
And you are now the master of your fate. No need to send your mount across the country for questionable/expensive service.
And you are now the master of your fate. No need to send your mount across the country for questionable/expensive service.
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By
George Cushing
· #30231
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STM32 Black pill
Make sure you have a solid 5V at the ESP8266's power pin.
Make sure you have a solid 5V at the ESP8266's power pin.
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By
George Cushing
· #30230
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Stepper Drivers
I don't think so. OnStep is designed for A4988 drivers and their successors, such as the LV8729. The EATAD763 is a carrier for the Torshiba TB6612FNG. The TB6612FNG is designed to replace PWM drivers
I don't think so. OnStep is designed for A4988 drivers and their successors, such as the LV8729. The EATAD763 is a carrier for the Torshiba TB6612FNG. The TB6612FNG is designed to replace PWM drivers
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By
George Cushing
· #30229
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Connecting PC by USB with ESP32S
I was asked if there is a problem with powering a ESP32S module with both USB and controller power supply simultaneously. Anyone know the answer?
I was asked if there is a problem with powering a ESP32S module with both USB and controller power supply simultaneously. Anyone know the answer?
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By
George Cushing
· #30076
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PCB for external drivers
I like the MiniPCB and have sold just under 100 kits, but I feel it's best sought out for its relative ease of assembly, compact size and good processor. Unless you already have a MiniPCB and Teensy a
I like the MiniPCB and have sold just under 100 kits, but I feel it's best sought out for its relative ease of assembly, compact size and good processor. Unless you already have a MiniPCB and Teensy a
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By
George Cushing
· #30036
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MKS Gen-L V2.0 + TMC2130 v3.0 ( project)
That cable looks pretty snaggy to me. There are other successful EQ-3 conversions mentioned in the Wiki showcase you may wish to check out.
That cable looks pretty snaggy to me. There are other successful EQ-3 conversions mentioned in the Wiki showcase you may wish to check out.
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By
George Cushing
· #29988
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