Any small electronics Gurus here?

Jeff-Groves · 11-03-14, 01:58 PM

Need help on what should be a simple thing if I knew what I was looking for.

I'd like ? in the image below to cut the circuit to the switch when the 3.3 to 5 volts power is on.
The pass through voltage for the switch would not exceeded 5 volts and is only used to ground the RX circuit.
The switch is a SPST Normally Open Momentary.

What this does (Or should do) is disable the switch circuit if the USB device is plugged in as that is where the 3.3 to 5 volts is drawn from.

And it needs to fit in here along with the switch.

Jeff-Groves · 11-03-14, 04:27 PM

The answer is, Anyone? Bueller? Bueller?

vanjast · 11-03-14, 05:15 PM

The USB connector has a standard 5V supply connection.

That device looks like a USB to Serial (RS232) converter, and it looks like you have a choice of selecting 3.3V or 5V for the RS232 line supply.

As USB provides standard 5V, I'd imagine selecting that jumper, you'd bypass the 'buck converter' which would convert 5V - 3.3V

What are all the numbers on top of that 28 pin chip - the black thing with all the legs (pins)

Wolferz · 11-03-14, 05:20 PM

Need more information.
What is that little box and what is it's purpose?
Standard memory stick?

If I had the numbers off that chip, I could possibly look it up.

Jeff-Groves · 11-03-14, 05:28 PM

It's a USB to serial converter. The workings don't matter as I only need what I found out was a switching relay to cut the switch curcuit.

What this does is hooks my computer to the Shooting Chrony serial port.
I can download info then.
The Switch is called a Funcution Switch. It steps through options on the chrony when connected.
Problem is you can't use the FU switch when hooked in to the serial port.
Thus the FU name?

Now imagine the new chrony I have that has the FU button next to the Forget button!!
FU and Forget!!

Now. Does the Timer button figure out when I hit FU and feed me the time till I hit Forget?
The Red ST button scares me! Not sure I want to know what it does!

vanjast · 11-03-14, 05:53 PM

There must be a manual for this thing..
If you can find the manual download link.. I'll have a look, as one can easily work out technical details from just a user manual.

Also a manual on that USB device would be helpful..

BTW.. pull that jumper off the TXD/RXD connector and place it on the 5V/Centre pin. Just don't plug the USB device in yet until we've had a look at the user manual.

I'm currently going on the premise that your Chrony is 'old tech' which uses 5V.

Jeff-Groves · 11-03-14, 06:00 PM

The jumper to RX and TX are a loopback for testing.
The Forget button does this.

Now I don't remember what the FU button does.

11-03-14, 01:58 PM	#1
Jeff-Groves GLOBAL MODDING TERRORIST Join Date: Sep 2014 Posts: 5,654 Downloads: 137 Uploads: 0	Any small electronics Gurus here? Need help on what should be a simple thing if I knew what I was looking for. I'd like ? in the image below to cut the circuit to the switch when the 3.3 to 5 volts power is on. The pass through voltage for the switch would not exceeded 5 volts and is only used to ground the RX circuit. The switch is a SPST Normally Open Momentary. What this does (Or should do) is disable the switch circuit if the USB device is plugged in as that is where the 3.3 to 5 volts is drawn from. And it needs to fit in here along with the switch. Last edited by Jeff-Groves; 11-03-14 at 03:48 PM.

11-03-14, 05:20 PM	#4
Wolferz Navy Seal Join Date: May 2007 Location: On a mighty quest for the Stick of Truth Posts: 5,963 Downloads: 52 Uploads: 0	Need more information. What is that little box and what is it's purpose? Standard memory stick? If I had the numbers off that chip, I could possibly look it up. __________________ Tomorrow never comes

11-03-14, 05:28 PM	#5
Jeff-Groves GLOBAL MODDING TERRORIST Join Date: Sep 2014 Posts: 5,654 Downloads: 137 Uploads: 0	It's a USB to serial converter. The workings don't matter as I only need what I found out was a switching relay to cut the switch curcuit. What this does is hooks my computer to the Shooting Chrony serial port. I can download info then. The Switch is called a Funcution Switch. It steps through options on the chrony when connected. Problem is you can't use the FU switch when hooked in to the serial port. Thus the FU name? Now imagine the new chrony I have that has the FU button next to the Forget button!! FU and Forget!! Now. Does the Timer button figure out when I hit FU and feed me the time till I hit Forget? The Red ST button scares me! Not sure I want to know what it does! Last edited by Jeff-Groves; 11-03-14 at 05:52 PM.

11-03-14, 04:27 PM	#2
Jeff-Groves GLOBAL MODDING TERRORIST Join Date: Sep 2014 Posts: 5,654 Downloads: 137 Uploads: 0	The answer is, Anyone? Bueller? Bueller?

11-03-14, 05:15 PM	#3
vanjast Sea Lord Join Date: Jun 2006 Location: Somewhere else now Posts: 1,739 Downloads: 825 Uploads: 4	The USB connector has a standard 5V supply connection. That device looks like a USB to Serial (RS232) converter, and it looks like you have a choice of selecting 3.3V or 5V for the RS232 line supply. As USB provides standard 5V, I'd imagine selecting that jumper, you'd bypass the 'buck converter' which would convert 5V - 3.3V What are all the numbers on top of that 28 pin chip - the black thing with all the legs (pins)

11-03-14, 05:53 PM	#6
vanjast Sea Lord Join Date: Jun 2006 Location: Somewhere else now Posts: 1,739 Downloads: 825 Uploads: 4	There must be a manual for this thing.. If you can find the manual download link.. I'll have a look, as one can easily work out technical details from just a user manual. Also a manual on that USB device would be helpful.. BTW.. pull that jumper off the TXD/RXD connector and place it on the 5V/Centre pin. Just don't plug the USB device in yet until we've had a look at the user manual. I'm currently going on the premise that your Chrony is 'old tech' which uses 5V.

11-03-14, 06:00 PM	#7
Jeff-Groves GLOBAL MODDING TERRORIST Join Date: Sep 2014 Posts: 5,654 Downloads: 137 Uploads: 0	The jumper to RX and TX are a loopback for testing. The Forget button does this. Now I don't remember what the FU button does.