开云体育

Two ideas I can think of. One, a disc with a hole in it and a led and optical sensor or a disc with a cam lobe on it to trip a microswitch. The 2nd approach is how the old clunk-clunk rotators (AR-22

What Jack said! Writing code isn't all that hard once you learn the language. The important part is being able to define the problem to be solved and then think through how to solve it in a logical

Well you can just count in software knowing there is not enough resistance to miss steps. Once the 3D printer starts on a part, there is no feedback of position, but the do start at home with micro

Great Fun Project. Watch out, Jack will tell you to use a Case Statement! So are there pictures of how you switch the antennas? The Action end?? Relays and stuff? Mike, WA6ISP

What about a Hall Effect sensor fixed to the fiberglass shaft? That way you wouldn't have to contend with figuring out microsteps, but only shaft revolutions. Jack, W8TEE To: [email protected]

Very nice!! It really makes me happy when I see others jumping into the fray and trying their hand at programming. Few things are as satisfying as getting a bunch of hot sand to do what you want.

A bit off topic, but I'd like to show a project that started while I look for a cabinet for the BITX40 project. It's a remote antenna switch. Jack, W8TEE, inspired me to try my hand at Ardunio

Hello, I also have the same kit and am using the supplied VFO circuitry with the Pacific antenna's digital dial. I get great reception and have transmitted 1300-2000 miles using a Carolina Windom in

Of course McMaster has it all!? And Polycarbonate. https://www.mcmaster.com/#timing-belt-pulleys/=19nhjv5

Good job, Allard! ?I'm impressed! You are adding a lot of functionality to the Bitx40 with a minimum of hacks. It's all quite polished and well documented, better than some commercial rigs. Very

Yes, but without a reset position (sensor or micro switch for home or end points) it could get lost. eBay has the 3D printer gears and belts.? I found a 15T pulley and a 28T one.?? I have a small

Mike: Is there a way to track the number of turns the VVC has made and, when it reaches a certain count, it won't advance the stepper any further? It might get a little messy with micro-stepping, but

These Stepper Drivers are used a lot for 3D printers.? I got spares, but never have blow one up. They are real inexpensive on eBay. The is a lot bigger problem driving a Vacuum Variable on the Loop

In the Files section of the group home is the assembly manual. I posted this on Sept 30. Look for my call. Jack, W8TEE To: [email protected] Sent: Tuesday, October 3, 2017 12:38 AM Subject: Re:

Mike: This is a kludge, but try this (new lines in yellow): at line 1574 add: ?? static int passCounter = 0; add these lines between 1593-1594: ??? 1593????? if (encoderDirection)

I found the Polulu to be the least dependable. This is the one I use - I bought the last ones from someone other than Banggood

I used to have a cabin in Canada and I mailed a package to myself in the States. Even the Canadians make fun of their postal service, saying that 90% of their relatively high postal rates is for

I've used both the EasyDriver and this one from Polulu: DRV8825 Stepper Motor Driver (Header Pins Soldered) | | | | | | | | | | | DRV8825 Stepper Motor Driver (Header Pins

I thought I saw the values somewhere but can't find them now. Take note, however, C243 has a different value on the schematic than in the construction notes. Vince. -- Michigan VHF Corp.

Build docs can be found here in the files section...the newest is 04. Sort on upload till you get the newest on top anad it'll be on that page. d