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HP 45 Charger`
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11-24-2018, 06:13 AM
(This post was last modified: 11-24-2018 07:00 AM by ijabbott.)
Post: #7
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RE: HP 45 Charger`
1N4002 isn't a Zener diode, it's a rectifier diode.
Looking at the schaematic at https://keesvandersanden.nl/calculators/...ic_charger, D5 is a 4.7V Zener diode, and D1 to D4 are 1N4002 rectifier diodes. Figure 8 at http://home.citycable.ch/pierrefleur/Jac...20unit.htm uses a 5.1V Zener, which is probably the one you want. You definitely need a Zener diode of approximately the same voltage, as it is used to provide a reference voltage for the power supply circuit. Probably any 5.1V Zener diode will do the job. It's not passing a lot of current in that circuit. An 1N4733A or a BSZ55C5V1, for example, should be more than adequate. But I'll defer to those on this forum who have actual experience with these power supplies! — Ian Abbott |
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| Messages In This Thread |
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HP 45 Charger` - Milanomike - 11-11-2018, 02:07 AM
RE: HP 45 Charger` - AndiGer - 11-11-2018, 11:24 AM
RE: HP 45 Charger` - Milanomike - 11-11-2018, 01:53 PM
RE: HP 45 Charger` - teenix - 11-11-2018, 11:00 PM
RE: HP 45 Charger` - Milanomike - 11-12-2018, 04:09 AM
RE: HP 45 Charger` - Milanomike - 11-24-2018, 03:07 AM
RE: HP 45 Charger` - ijabbott - 11-24-2018 06:13 AM
RE: HP 45 Charger` - Milanomike - 11-24-2018, 03:42 PM
RE: HP 45 Charger` - Milanomike - 11-25-2018, 02:59 AM
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