Note that these 2.54 mm strips are now sold by Amazon. Amazon also stocks a certain selection IC sockets. Typically 2 day shipping!

#pa #qcx #mods

An idea for your consideration to ease replacement of QCX+ PA devices. First off, Hans' design for mounting the transmit PA and Keying transistors is brilliant! There may come a time when one or more

#pa #qcx #mods

Hi Jelle I agree with your findings regarding JP7. Yes, the PCB layout is wrong here - I can see that now on the layout. I use Eagle PCB and of course it has verification tools to validate that the tr

#mods

An earlier posting with receiver signal trace brought the possible issue with JP7 to my attention. Paul m0bmn could not find the usual JP connection line to cut and isolate JP7 connection 1 from 2. I

#mods

Yes Chip, you will need to programme a second alarm to come on at 8am and go off at 8:01am. You also need to set the sense of the output you use for ‘active low’ to only enable the speaker ‘gnd’ conne

#clock #case #mods

Ken, we understand that we connect the ground side of the speaker to a free alarm output pin on the board. Do we now need to program a second alarm? It seems so. If the primary alarm is programmed to

#clock #case #mods

I used one of the other alarm outputs to control a simple ‘mute’ circuit to stop this tone when the alarm is not sounding. Instead of connecting one side of the loudspeaker to earth, connect it to ano

#clock #case #mods

Happy Saturday. Our clock, audio amo, and speaker are now operating great. We can play the chimes based on an alarm setting. However, we are experiencing a steady humming in the speaker when power is

#clock #case #mods

Thank you, Ryan. CC

#clock #case #mods

In the interest of sharing options, we opted to purchase these speakers. We have not yet decided whether or not we will install this amplifier circuitry. Chip 8-ohm Speaker https://www.amazon.com/gp/p

#clock #case #mods

TIN. Please do not harm anyone named Tim.

#clock #case #mods

Just Tim the capacitor lead and the exposed pin, then solder them together. Keep the warm hot so you don't have to hold the heat on too long. Pick any ground connection. The electricity doesn't know t

#clock #case #mods

Good afternoon. Does anyone have technique suggestions for connecting the 47uF capacitor to IC1 pin 15. We have already assembled the circuit boards. should we somehow solder directly to the exposed e

#clock #case #mods

Gregg, this makes sense, and thanks for the tip on the capacitor. My schematic eyesight is rusty. CC

#clock #case #mods

Hi Chip, Yes, you would wire your speaker with two leads. One lead of the speaker goes to ground, the other to a 47uF capacitor (that is what the schematic is showing you). The other lead of the capac

#clock #case #mods

Good Afternoon. My son continues to configure the clock with GPS receiver. He plans to use the clock in his dorm room, and he wants to buy a component speaker to install within the case. After reading

#clock #case #mods

The speed I used was correct. See comments on this thread regarding RS-232 at higher speeds ... Working great at 9600 bps with firmware Rev T1.04

#cat #mods #solution

I will check my RS-232 to TTL converter with a scope to see what the RS-232 levels really are. It uses a MAX232 chip with VCC being 5 volts.

#cat #mods #solution

So did that fix your problem? Roger Get BlueMail for Android

#cat #mods #solution

Sorry wrong speed used - senior’s moment. You are correct.

#cat #mods #solution