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Toymods » Tech & Conversions » 85 Corona Avante Taco Booster needed

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Henn
Forums Junkie


Location:
Rosanna, Melb
Registered:
June 2002
Re: 85 Corona Avante Taco Booster needed Sun, 28 August 2005 23:40 Go to previous messageGo to previous message
I think the whole point of this circuit is to produce a big voltage spike every revolution. The 5V square wave controls the transistor and so controls the current flow through the coil. The coil is there so when the current flow is stopped a voltage spike is produced, this is what the old dash tacho requires.

Also running no resistor is bad. The diode should have a 0.7V drop over it, the transistor base-emmitter should have 1.4V (maybe 0.7, can't remember) drop over it, and so what happens to the other 9.9V? You get big currents and hot wires and maybe a cooked transistor.

It's interesting to hear an PNP also works.

Hen
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SubjectPosterDate
Read Message   85 Corona Avante Taco Booster needed JapstangWed, 17 August 2005 13:32
Read Message   Re: 85 Corona Avante Taco Booster needed NorbieWed, 17 August 2005 22:57
Read Message   Re: 85 Corona Avante Taco Booster needed justcallmefrankThu, 18 August 2005 00:45
Read Message   Re: 85 Corona Avante Taco Booster needed takaiThu, 18 August 2005 00:20
Read Message   Re: 85 Corona Avante Taco Booster needed HyDrAThu, 18 August 2005 00:58
Read Message   Re: 85 Corona Avante Taco Booster needed NorbieThu, 18 August 2005 02:41
Read Message   Re: 85 Corona Avante Taco Booster needed CrUZsidaThu, 18 August 2005 02:45
Read Message   Re: 85 Corona Avante Taco Booster needed brett_celicacoupeThu, 18 August 2005 09:47
Read Message   Re: 85 Corona Avante Taco Booster needed JapstangFri, 19 August 2005 05:08
Read Message   Re: 85 Corona Avante Taco Booster needed HennFri, 19 August 2005 06:16
Read Message   Re: 85 Corona Avante Taco Booster needed BugmanSat, 27 August 2005 05:47
Read Message   Re: 85 Corona Avante Taco Booster needed brett_celicacoupeSat, 27 August 2005 11:15
Read Message   Re: 85 Corona Avante Taco Booster needed ndgcprSun, 28 August 2005 00:11
Read Message   Re: 85 Corona Avante Taco Booster needed ndgcprSun, 28 August 2005 02:39
Read Message   Re: 85 Corona Avante Taco Booster needed HyDrASun, 28 August 2005 07:37
Read Message   Re: 85 Corona Avante Taco Booster needed brett_celicacoupeSun, 28 August 2005 07:52
Read Message   Re: 85 Corona Avante Taco Booster needed HyDrASun, 28 August 2005 07:55
Read Message   Re: 85 Corona Avante Taco Booster needed HyDrASun, 28 August 2005 07:56
Read Message   Re: 85 Corona Avante Taco Booster needed brett_celicacoupeSun, 28 August 2005 08:01
Read Message   Re: 85 Corona Avante Taco Booster needed HyDrASun, 28 August 2005 08:10
Read Message   Re: 85 Corona Avante Taco Booster needed brett_celicacoupeSun, 28 August 2005 08:40
Read Message   Re: 85 Corona Avante Taco Booster needed ndgcprSun, 28 August 2005 08:26
Read Message   Re: 85 Corona Avante Taco Booster needed JapstangSun, 28 August 2005 11:50
Read Message   Re: 85 Corona Avante Taco Booster needed ndgcprSun, 28 August 2005 12:15
Read Message   Re: 85 Corona Avante Taco Booster needed JapstangSun, 28 August 2005 13:27
Read Message   Re: 85 Corona Avante Taco Booster needed oldcorollasSun, 28 August 2005 14:46
Read Message   Re: 85 Corona Avante Taco Booster needed Maurice cSun, 28 August 2005 15:29
Read Message   Re: 85 Corona Avante Taco Booster needed  HennSun, 28 August 2005 23:40
Read Message   Re: 85 Corona Avante Taco Booster needed brett_celicacoupeWed, 31 August 2005 11:06
Read Message   Re: 85 Corona Avante Taco Booster needed ndgcprWed, 31 August 2005 11:19
Read Message   Re: 85 Corona Avante Taco Booster needed HennWed, 31 August 2005 12:54
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