Complete basic electrics, Ben. An LED is a *current-driven* device. You can use *any* Voltage to feed it, so long as you limit the *Current*. You do this with a resistor. Here you use basic arithmetic and Ohm's law. Calculate the required resistance:? = Voltage / Current. Voltage is that supplied minus the LED's natural 'forward' (conducting / 'lit') voltage (typically that's around 1.3 Volts). So, given 12V supply and current around 10 milliAmps (a good starting point, most will give light at 2 or 3 mA and start burning out around 50mA - High-insensity types vary of course - look up the data sheets), then R = (12-1.3 / .010) which ends up around 1 or 1.2k (1000 or 1200) ohms. If only one is to be lit at a time, (RX or TX) they can share the resistor (the 'bi-color' type, or two devices). If they are to be individually lit and can be both lit, (PWR and TX) then each needs its own resistor.
73...
Dex, ZL2DEX
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So I can tap the wires from K1 and then use a voltage divider circuit to drop it to 3.3volts right?
Ben Kd2nou?
On Mon, Nov 6, 2017 at 12:52 AM Prathap Naidu < vu2pop@...> wrote: You can use a dual color LED with 3 leads, centre is common gnd. I have used a standard 3mm LED , you can also use 5 mm if you need, but the 3 mm is quite Ok The 680 ohms is the dropping and current limit resistor, I have tapped the 2 wires from the K1 relay which alternates the +12V between Rx and Tx 73 Pop VU2POP ? From: [email protected] [mailto:[email protected]] On Behalf Of Ben Piecora
Sent: Monday, November 06, 2017 11:11 AM
To: [email protected]
Subject: Re: [BITX20] RX and TX LED ? Thank you VU2POP. Is the yellow wire for RX and the green wire for TX and then the 680 ohm resistor goes to ground? Is the LED 12 volts? I was planning on using a Red 3.3 volt LED to indicate TX and a green 3.3 volt LED to indicate RX ? On Mon, Nov 6, 2017 at 12:37 AM Prathap Naidu <vu2pop@...> wrote: Hi ben See attached pics, solder 2 wires below the K1 relay as shown, then to the Dual color LED , the centre of the LED goes to ground thru a 680 Ohms restistor. Have fun happy Bitxing 73 Pop VU2POP ? From: [email protected] [mailto:[email protected]] On Behalf Of Ben Piecora
Sent: Monday, November 06, 2017 2:51 AM
To: [email protected]
Subject: [BITX20] RX and TX LED ? Could anybody tell me a way I can pull voltage from the board for an LED on RX and then pull voltage from the board for a TX LED and turn off the RX LED?
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You can use a dual color LED with 3 leads, centre is common gnd. I have used a standard 3mm LED , you can also use 5 mm if you need, but the 3 mm is quite Ok The 680 ohms is the dropping and current limit resistor, I have tapped the 2 wires from the K1 relay which alternates the +12V between Rx and Tx 73 Pop VU2POP ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Ben Piecora
Sent: Monday, November 06, 2017 11:11 AM
To: [email protected]
Subject: Re: [BITX20] RX and TX LED ? Thank you VU2POP. Is the yellow wire for RX and the green wire for TX and then the 680 ohm resistor goes to ground? Is the LED 12 volts? I was planning on using a Red 3.3 volt LED to indicate TX and a green 3.3 volt LED to indicate RX ? On Mon, Nov 6, 2017 at 12:37 AM Prathap Naidu <vu2pop@...> wrote: Hi ben See attached pics, solder 2 wires below the K1 relay as shown, then to the Dual color LED , the centre of the LED goes to ground thru a 680 Ohms restistor. Have fun happy Bitxing 73 Pop VU2POP ? From: [email protected] [mailto:[email protected]] On Behalf Of Ben Piecora
Sent: Monday, November 06, 2017 2:51 AM
To: [email protected]
Subject: [BITX20] RX and TX LED ? Could anybody tell me a way I can pull voltage from the board for an LED on RX and then pull voltage from the board for a TX LED and turn off the RX LED?
|
Thank you VU2POP. Is the yellow wire for RX and the green wire for TX and then the 680 ohm resistor goes to ground? Is the LED 12 volts? I was planning on using a Red 3.3 volt LED to indicate TX and a green 3.3 volt LED to indicate RX
73 Ben Kd2nou?
On Mon, Nov 6, 2017 at 12:37 AM Prathap Naidu < vu2pop@...> wrote: Hi ben See attached pics, solder 2 wires below the K1 relay as shown, then to the Dual color LED , the centre of the LED goes to ground thru a 680 Ohms restistor. Have fun happy Bitxing 73 Pop VU2POP ? From: [email protected] [mailto:[email protected]] On Behalf Of Ben Piecora
Sent: Monday, November 06, 2017 2:51 AM
To: [email protected]
Subject: [BITX20] RX and TX LED ? Could anybody tell me a way I can pull voltage from the board for an LED on RX and then pull voltage from the board for a TX LED and turn off the RX LED?
|
Hi ben See attached pics, solder 2 wires below the K1 relay as shown, then to the Dual color LED , the centre of the LED goes to ground thru a 680 Ohms restistor. Have fun happy Bitxing 73 Pop VU2POP ?
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Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of Ben Piecora
Sent: Monday, November 06, 2017 2:51 AM
To: [email protected]
Subject: [BITX20] RX and TX LED ? Could anybody tell me a way I can pull voltage from the board for an LED on RX and then pull voltage from the board for a TX LED and turn off the RX LED?
|
Re: BITX QSO Night, Sunday, November 5, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere
I tuned in late, but there was too much noise. I was using the FT-101 and the noise floor was about an S7 or S8.
Vince.
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On 11/05/2017 10:54 PM, KN4AAG Kevin Estep wrote: Only made one contact. NX2U, Michael, in TN.
Heard a few, very light, but couldn't make out the details.
Kevin - NC
KN4AAG
--
Michigan VHF Corp.
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Re: BITX QSO Night, Sunday, November 5, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere
Only made one contact. NX2U, Michael, in TN.
Heard a few, very light, but couldn't make out the details.
Kevin - NC
KN4AAG
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Re: BITX QSO Night, Sunday, November 5, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere
Tom, of all nights, tonight is the first night I got your call sign, when W1LY and you signed off. ?Shouted out to you with a 100 watts and a wire, but nothing getting out from here.
Craig KM4YEC
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Ok Dex...I hear you but you're never too old to try something new, eh?
It's now 0313 Z and managed to work VE3RRD AL about 3 miles, VE6RAC about 1,600 miles and W1LY Wily about 787 miles. Heard WI1B but did not confirm qso. Can't say I heard anybody else in 3 hrs. The band is a changin for sure. 73 all
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Re: BITX QSO Night, Sunday, November 5, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere
Ok Dex...I hear you but you're never too old to try something new, eh?
It's now 0313 Z and managed to work VE3RRD AL about 3 miles, VE6RAC about 1,600 miles and W1LY Wily about 787 miles. Heard WI1B but did not confirm qso. Can't say I heard anybody else in 3 hrs. The band is a changin for sure. 73 all
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Re: BITX QSO Night, Sunday, November 5, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere
W1LY,?
Your 600 watts like you are sitting next to me. at 10:07 and earlier about 15 minutes ago. ?I dialed up 90 watts and you didn’t answer.
Craig KM4YEC
in east TN
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On Nov 5, 2017, at 10:06 PM, Craig Thibodeaux < km4yec@...> wrote:
I heard W1LY calling CQ on both BitX40 and IC718, but no one hearing me tonight. I can hear W1LY and hear other side a few times with out getting call sign.
Time to raise the antenna.
Craig? KM4YEC
On Nov 5, 2017, at 9:47 PM, Dexter N Muir < dexy@...> wrote:
Tom VE3THR: About 3:45pm here, 9:45pm there - I've most likely missed the chance, and nothing else to try with :(
73...
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Re: BITX QSO Night, Sunday, November 5, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere
I heard W1LY calling CQ on both BitX40 and IC718, but no one hearing me tonight. I can hear W1LY and hear other side a few times with out getting call sign.
Time to raise the antenna.
Craig? KM4YEC
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On Nov 5, 2017, at 9:47 PM, Dexter N Muir < dexy@...> wrote:
Tom VE3THR: About 3:45pm here, 9:45pm there - I've most likely missed the chance, and nothing else to try with :(
73...
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Re: raduino v1.27 released (improved suppression of spurious burst)
I'd second that for the full Raduino - with A7 (and A6) free/d, it ought to be possible with a bit of assignment juggle ... :) especially not needing/wanting CW or 'touch keyer.' Would that be a different series/'branch' of code?
73 de ZL2DEX
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Re: BITX QSO Night, Sunday, November 5, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere
Tom VE3THR: About 3:45pm here, 9:45pm there - I've most likely missed the chance, and nothing else to try with :(
73...
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I put a resistor and a 12v LED into the TX line to my 30mm x 30mm fan which blows directly on the final heatsink. I wanted to drop the voltage to the LED and now I can see when I am in TX and that the fan is running. 73 Willy
On Sun, Nov 5, 2017 at 6:35 PM, Michael Hagen <motdog@...> wrote:
If 12V, maybe go to
3.3 to 4.7K.? Leds are fairly bright at a couple of ma?
Mike
On 11/5/2017 2:33 PM, Dexter N Muir
wrote:
Mike beat me to
it, and with better. Resistor first, then wire to diode/s (raw
voltage to flying leads not the best idea! :)
73!
--
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID "MotDog@..."
Mike@...
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Re: BITX QSO Night, Sunday, November 5, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere
radiomanjwt: we're 3 hours ahead of you (daylight saving adds 1), so that's 8-9pm here. Let's see, eh? This BITX is my first foray into HF, so even this 67-year-old is a "tenderfoot", and I have nothing more powerful.
73...
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Re: BITX QSO Night, Sunday, November 5, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere
I worked Mike VE6RAC on 7178 too. I called and called on 7277
nothing heard. Nobody heard
on the usual frequencies. My dx was Russ KG0BK and Gordy AA5TN both
about 3 miles away.
Ed W0OIC
On 11/5/2017 8:25 PM, Brent Seres
wrote:
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Listened on 7277
tonight but didn't hear anyone...got clobbered by the BC station?
on 7275.
Brent
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Re: BITX QSO Night, Sunday, November 5, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere
Didn't hear much on 7277. Worked Tom VE3THR here in ON, and Ken WI1B in MA. Heard a couple of weak stations, couldn't get calls.
But did work VE6RAC in Alberta with my 6W on 7178 which is now my furthest distance covered with my Bitx40.
73 - AL? VE3RRD
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Re: raduino v1.27 released (improved suppression of spurious burst)
Hi Allard, thanks for the reply. Would it also ne possible to incorporate encoder tuning? It would be much easier to tune ig you could just push a button for hz, khz, mhz, and adjust with encoder. Cheers John de VK4JWT?
Sent from my SAMSUNG Galaxy S7 edge on the Telstra Mobile Network
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-------- Original message -------- From: Allard PE1NWL <pe1nwl@...> Date: 6/11/17 9:49 am (GMT+10:00) Subject: Re: [BITX20] raduino v1.27 released (improved suppression of spurious burst)
Hi John, Thanks for notifying. It's only a display issue. The VFO can really tune beyond 10Mhz, but the display gets messed up because of the extra digit. I'll try to improve that in the next version. 73 Allard PE1NWL On Sun, November 5, 2017 23:07, radiomanjwt wrote: > Hi, just a quick question about the frequency range, i installed ver 1.26, > all ok, then changed the upper and lower frequency range to 3mhz and > 15.5mhz. I had hoped to be able to rx 30 and 20 metres using different > bpf, but when going up in frequency, the vfo only gets to 9.999mhz then > goes back to 1mhz? I cannot get it to go any higher.Cheers John de > VK4JWT?? > > > Sent from my SAMSUNG Galaxy S7 edge on the Telstra Mobile Network
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Re: BITX QSO Night, Sunday, November 5, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere
Listened on 7277 tonight but didn't hear anyone...got clobbered by the BC station? on 7275.
Brent
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Re: BITX QSO Night, Sunday, November 5, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere
Hi Dexter, I have successfully worked ?zl with my bitx40, he was only running 100w and an inverted vee, my report was 55, just running barefoot 7 watts into a butternut hf9v sitting on a pontoon floating in salt water. If you would like to try a sched, zl's usually coming in here around 17:00 to 18:00 Brisbane time (est no daylight savings) Cheers John de VK4JWT Bribie Island
Sent from my SAMSUNG Galaxy S7 edge on the Telstra Mobile Network
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Craig Thibodeaux
Willy
ekelley
radiomanjwt
Brent Seres/ VE3CUS