Memory Backup for the Devil Fish modified TB-303 Robin Whittle 10 May 2015 www.firstpr.com.au/rwi/dfish/ © Robin Whittle 2015. TB-303 is a trade
10their lithium polycarbon monofluoride batteries have a longer life in low-current battery backup applications. I suggest you buy one of the follo
11The battery almost clipped into the holder. Red marks the positive contacts, which hook over the edge of the main body of the battery. On the
12Testing the voltage of the 2032 coin-cell battery Lithium coin-cells have a smaller electrical capacity and greater chance of electrolyte evapora
13higher), then if the capacitor is not being driven via the internal diodes from the main power supply, or by the C-cell or the coin cell batteries
14Document history • 2015-02-02 New document. • 2015-02-04 Added note about DHL accounts only being allowed for businesses which ship to other bu
21 - This Devil Fish has one of three approaches to battery backup In the printed version of this manual, one of the boxes below is marked with an
3Determining whether a machine has Option A, B or C If you have a machine without its original documentation, you can determine which memory backup
41 - IF power is supplied via an external 9 volt adaptor (which is regulated inside the TB-303 to +6 volts) AND the power switch is turned on, the
51 - If the machine was left running from batteries for too long, the voltage would drop so far that firstly memory data would be lost and secondl
6These cells have a self-discharge rate of less than 1% per year, depending on the temperature. With the ordinary memory chips, which draw very sm
7This was a perfectly satisfactory solution to the memory backup problem. It remains so, except for a problem which we had to resolve in 2015: 3 -
8 We can't use TNT or FedEx. If we retained the permanently installed lithium batteries, we might be able to use DHL or UPS, but it would cost
9or as little as 3.7 volts, they will still be able to power the original memory chips or the 32 Bank Memory system, for many years. Option A'
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