BEAM Projects > Wilf's Improved PummerToo
Finished Pummer

MillerSE Schematic


Wilf's Improved Pummer schematic from

Circuit used: Wilf's Improved Pummer

Created by: Wilf Rigter, read his credits here; and his webpage is here

Construction Notes:
I had such fun with the first one I built (you can see it here). I recycled a previously made pummer (check it out here). The only things I reused was the stand and solar cells. The solar cells had a a 100K resistor on the back as called for in schematic.

Note: this is drawn from the top looking down on the chip with pin 1 as the top left pin.

I used a battery from an old Motorola cellphone. I covered it with blue duct tape. See, duct tape can be used for anything! This build went a lot smoother than the first one.

I used a blue and red LED for the the lights. It works great. The only 'issue' I have is that it takes a bit more light to turn off the pumming than my first one. I think it has to do with the solar cells. Other than that, it is great.

I think it turned out well. Let me know what you think.

Recycled Bits
Recycled Bits

Cell Phone Battery
Cell Phone Battery

Battery in Place

Battery in Place

240 Rails Done
Top view of 74AC240 with rails soldered. The two leads at the bottom go to the LEDs

240 Bottom view
Bottom view of the 74AC240. You can see the leads for the LEDs better here.

47K resistor and diode
47K Resitor and diode soldered on

Resistors To Gnd
4.7M resistors to ground on the 74AC240

LEDs are soldered together with opposite polarity.

All Doneall done

Side View
Side view of finished PummerToo


Pumming red

Pumming blue


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