Search found 1720 matches

by ahull
Mon Feb 19, 2018 4:35 pm
Forum: Off topic
Topic: UT61E SD BLE logger
Replies: 2
Views: 41

Re: UT61E SD BLE logger

by ahull
Sun Feb 18, 2018 11:49 pm
Forum: Code snipplets
Topic: Reading Battery Voltage
Replies: 4
Views: 108

Re: Reading Battery Voltage

Do you switch off/on the bottom R2 divider resistor? I am using this circuit to enable the battery reading - I can't remember where I found it but it works well for me. Any suggestions on improvements to my code or circuit is always appreciated! That looks like a pretty useful and simple power mana...
by ahull
Fri Feb 16, 2018 1:00 am
Forum: Off topic
Topic: I.C. Tester
Replies: 3
Views: 89

I.C. Tester

This was on HAD, and reminded me of a similar gadget I had years ago (which came as a DIY kit for an ISA card for a Windows 95 PC from memory).

http://www.instructables.com/id/Smart-IC-Tester/

I wonder how easy it would be to port to the STM32F103XX
by ahull
Fri Feb 16, 2018 12:30 am
Forum: STM32F103 Boards
Topic: "WAVGAT" black pill pull up resistor
Replies: 4
Views: 250

Re: "WAVGAT" black pill pull up resistor

On the plus side, the delivery was reasonably quick, and they look well made, and very cheap. :D I might order a couple.
by ahull
Thu Feb 15, 2018 8:41 pm
Forum: Projects
Topic: Lightpen
Replies: 5
Views: 143

Re: Lightpen

http://www.seekic.com/uploadfile/ic-circuit/s200976202344774.gif ... or ... http://www.seekic.com/circuit_diagram/Basic_Circuit/PICTURE_DRAWING_LIGHT_PEN.html http://www.seekic.com/uploadfile/ic-circuit/s200975215117126.gif I think some very crude ones (in the likes of old Pong style consoles) used...
by ahull
Thu Feb 15, 2018 9:38 am
Forum: Projects
Topic: STM32F1/F4 3d Printer board. Worth a kickstarter?
Replies: 17
Views: 551

Re: STM32F1/F4 3d Printer board. Worth a kickstarter?

I can't think of any reason why a better faster processor on machines with six or more dimensions of freedom (X, Y, Z, Extrusion or cutting rate, Time, Temperature at the bare minimum) would not benefit from a more capable processor, so the basic idea of using an STM32FXXX is sound. Adding more vari...
by ahull
Wed Feb 14, 2018 5:06 pm
Forum: Working / ported libraries
Topic: Bluepill, PB10 and PB11 pulling down the signal while using as input
Replies: 7
Views: 115

Re: Bluepill, PB10 and PB11 pulling down the signal while using as input

Image

On the right Roger, beside the yellow jumpers :P
(Its usually me who is over thinking the problem ;) )
by ahull
Wed Feb 14, 2018 4:06 pm
Forum: Projects
Topic: STM32F1/F4 3d Printer board. Worth a kickstarter?
Replies: 17
Views: 551

Re: STM32F1/F4 3d Printer board. Worth a kickstarter?

If you get the right supplier, then in theory you can build it for the same or less than the cost price (as opposed to the approx $20 retail price) of those melzi clones. If we assume the cheap Melzi clone is making someone between 20 and 50%, then back of a fag packet calculations suggests build co...
by ahull
Wed Feb 14, 2018 3:24 pm
Forum: Projects
Topic: STM32F1/F4 3d Printer board. Worth a kickstarter?
Replies: 17
Views: 551

Re: STM32F1/F4 3d Printer board. Worth a kickstarter?

Also worth bearing in mind is the bottom line. What could you realistically expect to make per board. You are competing against the likes of the cheap $25 Melzi clones for peoples attention. You either need to beat them on price, or add some extra magic to stand out from the crowd. Faster, more accu...
by ahull
Tue Feb 13, 2018 11:01 am
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 760
Views: 15148

Re: F405 & F411 versions of the BluePill

I'll take the glory, even if it isn't deserved.

Image