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Here's my entry for this year's contest. This is the Cheapo MP3 Player Controller. When triggered, the controller will turn on the player and when the pre-set time period runs out, it will turn off the player. It can't be re-triggered during playback. Yeah, I know it's not a prop, but the challenge was too interesting for me to ignore. The how-to is nearly finished - Parts 1 and 2 are here:
http://www.teambac.com/web_hall/mp3_player/otaku/MP3_player.html
Thanks, Wes, for posting these.
Here's the parts list:
All Electronics:
Perf board-
p/n PC-3 1 each 1.50
Enclosure-
p/n TB-3 1 each 2.50
556 timer IC-
p/n LM556 1 each 0.45
1 MFD tanatalum cap-
p/n DT-25 1 each 0.33
0.1 MFD disc cap-
p/n 104D50 4 each 0.40
220uF/35V radial cap-
p/n 220/35VR 1 each 0.25
1.5Mohm 1/4 watt resistor-
p/n 1.5M1/4 1 each 0.05
100Kohm 1/4 watt resistor-
p/n 100K-1/4 5 each 0.25
Rectifier diode-
p/n 1N4001 2 each 0.14
Switching diode-
p/n 1N4148 2 each 0.14
14-pin IC socket-
p/n HRICS-14 1 each 0.50
AAA battery holder-
p/n BH-41 1 each 0.75
1 Mohm potentiometer-
p/n AP-1M 1 each 0.50
9VDC SPST relay-
p/n RLY-409 1 each 1.75
6VDC DPDT relay-
p/n RLY-468 1 each 1.00
Fry's Electronics:
9 volt battery holder-
p/n BH-910 1 each 0.79
Jameco (or free samples from Keystone Electronics):
USB-A female socket-
p/n 161023 1 each 0.79
MPJA:
MP3 player-
p/n 16520 MI 1 each 4.95
Solder - 0.50
Bus wire - 1.00
Total cost: $16.54
http://www.teambac.com/web_hall/mp3_player/otaku/MP3_player.html
Thanks, Wes, for posting these.
Here's the parts list:
All Electronics:
Perf board-
p/n PC-3 1 each 1.50
Enclosure-
p/n TB-3 1 each 2.50
556 timer IC-
p/n LM556 1 each 0.45
1 MFD tanatalum cap-
p/n DT-25 1 each 0.33
0.1 MFD disc cap-
p/n 104D50 4 each 0.40
220uF/35V radial cap-
p/n 220/35VR 1 each 0.25
1.5Mohm 1/4 watt resistor-
p/n 1.5M1/4 1 each 0.05
100Kohm 1/4 watt resistor-
p/n 100K-1/4 5 each 0.25
Rectifier diode-
p/n 1N4001 2 each 0.14
Switching diode-
p/n 1N4148 2 each 0.14
14-pin IC socket-
p/n HRICS-14 1 each 0.50
AAA battery holder-
p/n BH-41 1 each 0.75
1 Mohm potentiometer-
p/n AP-1M 1 each 0.50
9VDC SPST relay-
p/n RLY-409 1 each 1.75
6VDC DPDT relay-
p/n RLY-468 1 each 1.00
Fry's Electronics:
9 volt battery holder-
p/n BH-910 1 each 0.79
Jameco (or free samples from Keystone Electronics):
USB-A female socket-
p/n 161023 1 each 0.79
MPJA:
MP3 player-
p/n 16520 MI 1 each 4.95
Solder - 0.50
Bus wire - 1.00
Total cost: $16.54