amp
amperage
amplifier
analog
ancient
board
case
closeup
component
connectors
control
current
design
device
display
electric
electrical
electricity
electronic
energy
enlarged
equipment
glass
high
history
indicator
industrial
industry
instrument
measurement
meter
needle
obsolete
old
power
rain
removed
retro
scale
science
socket
supply
technology
train
trickle
tube
vintage
visual
voltage
white