ADWSystems
Member
First querstion: How does the ESR of a standard capacitor compare to that of
1) a regular alkiline or NiCd battery
2) a supercap such as **broken link removed** (this one is actually listed at 30 ohms)
and 3) a "memory back-up" cap like https://www.allelectronics.com/make-a-store/item/CBC-18/4.7-FARAD-2.5-VOLT-MEMORY-DYNACAP/1.html
Secondly. Am I remembering correctly that the ESR reduces the voltage available depending on the current draw? If you have a "storage device" charged to 5V with an ESR of 10 ohms and pull 100mA you lose 1V due to the ESR and only receive 4V across the terminals?
1) a regular alkiline or NiCd battery
2) a supercap such as **broken link removed** (this one is actually listed at 30 ohms)
and 3) a "memory back-up" cap like https://www.allelectronics.com/make-a-store/item/CBC-18/4.7-FARAD-2.5-VOLT-MEMORY-DYNACAP/1.html
Secondly. Am I remembering correctly that the ESR reduces the voltage available depending on the current draw? If you have a "storage device" charged to 5V with an ESR of 10 ohms and pull 100mA you lose 1V due to the ESR and only receive 4V across the terminals?