TomGeorge:
Hi,
10uF helps to stabilize the circuit and provide some power reserve when the TX transmits.
Bypassing with 0.1uF caps is a standard practice, especially with digital circuitry and battery supply, to prevent digital noise moving around the circuit through the power supply tracks.
Even at this point you can add bypass caps to your PCB. 0.1uF disc ceramics.How can the B1 signal get to the B2 or B3 traces? They are wired each directly to a separate input pin and supplied from the fixed positive supply
Tom...
They are all connected to VCC pin to supply power initially, then transistors keep the tiny alive while transmitting and self shutdown.
MarkT:
The "slow rising and falling" is purely due to you using a soundcard as an oscilloscope, soundcards
are AC coupled, as pointed out by cmiyc in #2.You have no decoupling capacitors on the board, I note - perhaps the 433MHz module needs one?
In general a board without decoupling is an immediate red-flag.In general if you have an issue moving from a breadboard to a PCB then you made a mistake in
the copying - it pays to double-check with electronics since only one mistake can render an entire
circuit inoperative (or cause damage)."Check twice, buy once"
My sound card used to detect the voltage perfectly, weird...
No decoupling capacitor one the breadboard, and it was working flawlessly.. I can try tho.
I will double check to find an error in the PCB