gres
Full Member level 4
Project is simple, based on relays. How it is work?
With charges in my case - suspenders "central" is set, at the back we connect cables, at front 20 m twisted cable ( typical internet staight cable) at second end we plug steering panel, with 7 buttons ( microbuttons). All construction was designed on board. At the left side there is smaller button, and 2 on right. They were build in, to have one hand controlling possibility. As you can see at the pictures, device is very handy.
Left button and upper right are responsible for safety system, that means that any unauthorized person wan't be able to fire. You have to press left button, next right one, and then choose with charge we want to fire. We can also fire all 7 charges by one button, pressing all at controll table and releasing side button. Right bottom button is for backlight, Backlight is thanks to blue LED diode, it looks really fine and work perfect at night.
At central there is on/off button - big black and is responsible for power. When power is on, green diode flash.
Red diode informing about voltage at outputs, so is for safety reason ( we can see if there is voltage on outputs and fuse work at the pressing button moment. I made small chip based on 7 transistors, used BC307 and resistor on diode.
To fire charges I use gel batteries 12V 4Ah It’s only for that job so nothing else can bring down it. Thanks to that we can fire even 7 charges at once. Second accumulator is unfortunately weaker and in works as a controller – it control all system.
Building process is simple except all this cables. Fuse is safe, first of all he works with healthy safe voltage.
more pictures and original text at https://www.elektroda.pl/rtvforum/topic1537107.html?sid=ddc1618fec3089db0188d00d817077e0