Where can I buy 12 VDC capacitors?

Filter the results in the table by unit price based on your quantity. Filter the results in the table by unit price based on your quantity. 12 VDC Capacitors are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for 12 VDC Capacitors.

Where can I buy 12 VDC supercapacitors / ultracapacitor?

Filter the results in the table by unit price based on your quantity. 12 VDC Supercapacitors / Ultracapacitors are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for 12 VDC Supercapacitors / Ultracapacitors.

Can a capacitor & diode be connected to a battery?

With regard to the capacitor and diode idea, you need to be aware that if one connects a large high-quality initially-discharged capacitor to an "already-on" power supply such as a battery, the cap will try to draw as much current as the supply will put out.

What happens if a cap is charged to 12 volts?

If your cap is charged to 12 volts, and your circuit will fail when it drops to 10, you'll only be able to use about 30% of your caps energy storage ability (the circuit will fail when the cap still has has about 70% of the energy that was put in).

Can a capacitor & diode be used to power a plotter?

A friend has suggested that a capacitor and diode will provide adequate temporary power to maintain the voltage until the engine start is finished. The plotter draws maximum 13 watts at minimum operating volatge of 10.8 V. Is this viable - and if so, what size Cap? I am not too worried about load dump as there is little else to shed!

What if a 2V volt drop is 15A?

If there's a 2V volt drop @15A then there's about 0.13 ohm in the supply circuit so either the battery is underspec or you need thicker wire/better connections. That battery size is extremely tiny compared to your load current of 6.5 to 15 Amps. The battery internal resistance is going to cause all sorts of problems. May 18, 2016 at 1:24