Hook up capacitor backwards - how to hook up a capacitor - YouTube

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This is one of my favorite characteristics of this circuit.  The 0-20v digital digital display is easy to use, and will act to show us both the capacitor charge voltage and the DC-DC booster output voltage.  This circuit requires roughly 8-14VDC to operate.  Both of the bottom pins are connected to the ground line.  The upper left pin is the DIGITAL DIISPLAY REFERENCE.  The voltage at this pin will be displayed digitally on the display.  The digital display will display any voltage between 0-20VDC.  When the DPDT switch is not connecting the capactor bank voltage to the booster circuit, the digital display will be displaying the charge on the capacitor bank.  When the DPDT is switched on, the output of the booster will be displayed.  Since the display has a 20v maximum limitation, it is suggested that if you are going to implement it, that you keep the booster output limited to 20VDC or under.

The voltage at the upper right pin is the line that powers the entire display.  This can be hooked directly to the input DC voltage line. It will work anywhere from to 15, but it is preferred that you use 8-14v.  The and 100uf capacitors that are placed at the DC input are implemented for the sake of protecting this digital display.  When you stop, disengage the DC input charge, this display will shut off. 

If you want, you can add a monotary push switch between the DC-DC booster and the power line of the digital display.  This will enable you to have a look at the output of the DC-DC booster when you push down and hold the monetary switch by adding secondary power supply for the display.  However, if you choose to go this route, it is necessary to add a diode into the mix.  If you want to go this route, as I did in the circuit viewed in the video, let me know and I'll include another schematic.

Hook up capacitor backwards

Hook up capacitor backwards