IBM - IBM 02K6753 AC ADAPTER 02K6746

here's an AC power adapter that you might plug into a wall to power a small electronic device this particular one takes in 120 volts AC and outputs 9 volts DC let's remove the cover and see what's on the inside we have transformer capacitor and several diodes the transformer has a primary coil behind this yellow tape here's the secondary coil it outputs a much lower voltage around 9 volts but it's still AC the purpose of the diodes here is to convert the AC into DC but it's a pulsating pulsating DC and this capacitor here is the smoothing capacitor here's the basic circuitry of an AC adapter laid out using light emitting diode so we can see it in operation there's 120 volts AC cord to a transformer the transformer is going into a diamond-shaped configuration of diodes here made with light emitting diodes the output from that is powering a regular small incandescent light bulb now let's