30th November 2017 at 1:42 pm #2123
Hi has any one a pcb layout for this project
Albert1st December 2017 at 4:07 pm #2135
This is something I have thought about a lot but never done anything about it.
Does anybody want to volunteer?
7th February 2019 at 6:59 pm #2472
- This reply was modified 1 year, 4 months ago by Martyn.
Hi Martyn ,
On old topic but maybe this request is still valid.
I’m doing pcb design as a profesion .
I could make a pcb but it will take me some time to finish it.
just send me an email if you are interested.
Luc8th February 2019 at 1:07 pm #2529
I have sent you an email.
Martyn8th February 2019 at 3:32 pm #2542
Hi Martyn, Luc
What a coincedence. About 2 weeks ago I came across this website and forum because I want to start with droplet photography. I read the topic about making a PCB and I designed one. Last week I ordered 10 PCB’s and I expect them to recieve them in the next 3 weeks.
Maybe we can work together?
René8th February 2019 at 8:40 pm #2543
Indeed what a coincidence.
I agree to work together if necessary but will wait till I have cleared out some things with Martyn. (Our posts where crossing each other and had in the meanwhile some conversation with Martyn).
Luc8th February 2019 at 9:19 pm #2544
René20th February 2019 at 6:29 am #263520th February 2019 at 6:15 pm #2637
That is a very nice design. I send my design to Martyn last week for review. I ordered 10 boards in China and they should turn up in the next few weeks.
What are the dimensions of your board?
(also Dutch :D:D)20th February 2019 at 7:08 pm #2638
if i’m corect these were 17×15 cm, orderd some other boards from jplc las week and had them in a week.
this board is on a hold because, first i need all the parts, seems that some parts are diff. to order, the reason for this is, that sometimes you order a part and they send a replacement, that somewhat different with another footprint, once the board is made you have no option then modify the part to fit.
if i have all the parts i can make a correction to the pcb if something is wrong9th March 2019 at 12:54 am #26699th March 2019 at 10:37 am #2670
update of pcb to the latest mod (schematic), removed the buck converter swap this to 2 seperate voltage inputs, 5v and 12v for the selonoid’s11th March 2019 at 11:51 am #2672
it looks like you have vcc and gnd connected to the same pin on the manual drain switches.
I presume not all traces are shown in the image.11th March 2019 at 10:58 pm #2673
Theo Bosters11th March 2019 at 11:11 pm #2674
BTW. the valve (shown as grey), is de VCC, thats what’s in the rca jack’s i’m using. looking at youre schematic the drain from de mosfet is conected to the anode from the 1n4007 that’s leading to the GND of the rca jack????11th March 2019 at 11:24 pm #2675
Theo Bosters13th March 2019 at 10:40 am #267730th March 2019 at 4:33 pm #2710
Spiro Chekano30th March 2019 at 4:45 pm #2711
Spiro Chekano31st March 2019 at 7:02 pm #2713
What a coincidens, today i was testing my board.
everything seems to be working except the BT.
tried everythig but still not working, i even seperated the BT section and placed it to a sep. bredboard with only the tx and rx conected to the arduino (pin A4/A5 with the voltage divider on the BB), and still not working.
BT is working with other test PRG’s butt nott with the dropcontroller.
Looks lik there is no fault with the pcb board ???????31st March 2019 at 7:56 pm #2714
Between other projects I too managed to complete and test my PCB.
I had no problems with the BT. Connecting and changing the name was very easy.
Next 3 weeks I have no time. Next step is to order some valves.
@martyn: Did you get my email about 2 weeks ago?31st March 2019 at 8:21 pm #2715
I viewed your video a couple of times but I can’t see it very good. What are the values of the 2 resistors that create the voltage divider (R23/R24) and what is the BT VCC?
René31st March 2019 at 9:08 pm #2716
Hi rene the value of the resitor is resp. 1k and 2k, the voltage on the BT is 3.09 volts
Theo31st March 2019 at 9:15 pm #2717
if you wnt you can add me on FB. RENE!!
facebook.com/theo.bosters.931st March 2019 at 11:48 pm #2718
@ René. Just found your email in the Junk folder. Along with some others that are about the dropController. Will reply separately.1st April 2019 at 5:43 am #2719
I don’t have FB but my wife has. So the voltage divider is correct but the VCC is, I think, on the low side. On the back of my BT-module power should be between 3.6V and 6V. It seems not a lot but the difference is quite big.
René1st April 2019 at 7:42 am #2720
The voltage divider is for the serial Arduino TX to BT RX connection.
The actual Bluetooth module (the small daughter-board) is a 3.3v device. Most HC-0xs have regulators on the breakout board to bring down vcc to 3.3v (this is why they canaccept up to 6v) but they do not convert the TX or RX pins which are still 3.3v. The voltage divider steps down the Arduino TX 5v pin to around 3.3v. A 5v Arduino sees 3.3v as HIGH so there is no need to upstep the 3.3v BT TX pin and it can be connected directly to the Arduino RX pin.1st April 2019 at 11:43 am #2721
checking the voltage again, the voltage on the RX of the BT = 3.42 volt,
on the Rx = 4.96 volt.1st April 2019 at 1:10 pm #2722
Just measured the VCC on the BT and that is 5,06V. According to several datasheets the VCC-range is between 3,3V and 6V. 3,09V is a little bit to low.
René1st April 2019 at 1:33 pm #2723
Rx = TX side, the voltage mesured when lead to TX is not conected (arduino pin A4), when BT lead to TX is conected the voltage is 3.4 volt.1st April 2019 at 10:16 pm #2724
Thnx for not pointing out that i was using the wrong (old) app.
could be a great project if the update and respons was better.
goddamn searching for more than 2 days what could be wrong ;-(
sorted it out finaly2nd April 2019 at 11:04 am #2725
no need to thank me. It’s all part of the service