Timeline for Simple circuit to bypass preamp when battery fails
Current License: CC BY-SA 4.0
19 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| S Jun 28 at 21:31 | history | suggested | rzickler | CC BY-SA 4.0 |
Headline to sentence case.
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| Jun 28 at 19:47 | review | Suggested edits | |||
| S Jun 28 at 21:31 | |||||
| Jun 28 at 19:34 | answer | added | Dave Tweed | timeline score: 3 | |
| Jun 28 at 6:26 | comment | added | Argy | I think the SSR, JFET and MOSFET suggestions could be at the heart of the switching part of the design. | |
| Jun 28 at 6:25 | comment | added | Argy | Maybe I am asking the wrong question. Rather than add something around the existing pre-amp, maybe my aim should be to find a completely new circuit which behaves like this. | |
| Jun 28 at 6:20 | comment | added | Argy | I have in the past kept a “special” battery for live gigs only, then I need to keep track of how often I have used it so that I know when to replace it. | |
| Jun 28 at 6:16 | comment | added | Argy | I’m grateful for all the answers so far. To answer some of the questions: The battery is a 9V PP3, and the preamp is the standard on-board amp pre-amp provided with a Status bass guitar, with volume, bass and treble controls and a potentiometer thst adjusts the mix between the two pickups. | |
| Jun 27 at 3:05 | comment | added | MicroservicesOnDDD | What's the make & model # of the preamp? Also, what battery, Voltage, size, and type please. Is it 9V? 2xAAA, 3xAA? and... Lithium? Alkaline? Or "Heavy Duty" Carbon-Zinc? Thanks. | |
| Jun 25 at 2:33 | answer | added | Tim Williams | timeline score: 3 | |
| Jun 19 at 23:04 | comment | added | Jens | The amplifier input and output would still be a significant load to the coil, especially if there is no supply. So you would need probably two SPDT switches or SSRs, that work in the NC state without a supply and a lot of other components. How about a solar panel on the guitar? Do you know the current consumption of the amplifier? | |
| Jun 17 at 5:12 | comment | added | Voltage Spike♦ | Just install two batteries, a backup and regular, or just replace the battery before the show | |
| Jun 17 at 4:33 | comment | added | Jasen Слава Україні | if you're being paid put in a new battery and save the old one for practice sessions. | |
| Jun 16 at 5:17 | comment | added | winny | Have you looked at NC relays? | |
| Jun 15 at 23:21 | answer | added | Spehro Pefhany | timeline score: 3 | |
| Jun 15 at 23:20 | comment | added | periblepsis | Or design for two batteries or use one with more capacity. | |
| Jun 15 at 23:04 | comment | added | vir | A relay could work here but the coil's power draw might be prohibitively high in relation to your battery's capacity. Analog switch chips are another option, but do require a bit more design work. Both would require a voltage detection/lockout circuit with hysteresis for satisfactory operation. | |
| Jun 15 at 22:57 | review | Close votes | |||
| Jun 28 at 13:37 | |||||
| S Jun 15 at 22:34 | review | First questions | |||
| Jun 15 at 22:35 | |||||
| S Jun 15 at 22:34 | history | asked | Argy | CC BY-SA 4.0 |