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Use the MCP1702 regulator instead of 78L05. Quiescent current Iqo is 2 uA and under 20 uA at consumption of 20 mA. Drop-out is 650 mV at 250 mA (at 20 mA it will be under 50 mV).Or use MCP1802 with shutdown function and max. 0.1 uA.

; wait for years ,days, hours ; if you dont want constants, use #symbol instead: #DEFINE years 1 #DEFINE days 10 #DEFINE hours 6 Main: for w0 = 1 to years gosub year_pause next for w0=1 to days gosub day_pause next for w0=1 to hours gosub hour_pause next stop year_pause: for...

If you need to distinguish the polarity in a “traditional” DC control, try the modified westaust55 design scheme.

Another alternative

Another option is to drop the 48V input voltage by a constant value. The circuit on the picture reduces the input voltage by 45V. Then, ADC voltage will be 0..5V at 45..50V input. The readAdc/readAdc10 command provides a 20mV/5mV resolution. Another ADC input would be used to measure large...

Picaxe itself cannot reliably switch this relay model in a capacitor design. Excessive voltage drop on the output pin will provides for the relay only 5V * 250Ω / (250Ω + 90Ω) = 3.7V. Even when 3.7V is near minimum 3.75, the relay have to be at this voltage for min.10ms. But in...

Diodes are in the internal structure of the picaxe output pin

Simplification phase 3: ------------------------- (A) Since we have the switching power supply with 3 outputs: 3.3V / 5V / 12V, we have to find such power supply module that contains other required properties and behavior: The module diagram is in figure 4. Switching Power Supply...

Simplification phase 2: ------------------------- (A) We can use a switching power supply with 3 outputs: 3.3V / 5V / 12V instead of power supply 230V AC / 12V DC and two DC/DC converters. (B) The second change is to replace the fuses with the MIC2544/48 (Hi-side switches with current limiter...

Hi Rav, Your proposed version in #24 don't contain errors, that were in the previous one. But it seems still too complicated. In the following, I am introducing a simplification of the Power supply module. Three different levels. It's just my insight - it may not be the only one nor the best...

(7) Adjustable calibration constant: Here is the example of the simple adjustment of the calibration constant, incorporated to your sample code, published in #1. It use three buttons: one to select the calibration mode and next two to the value increment/decrement. CODE in attachment: Note...

First of all, if I misunderstood your project: (1) Is the OLED display part of your Rallye Meter, or is intended for testing and the main display means are electromechanical counters? (2) As you stated "This project is a Rallye Meter - with several electromechanical counters (10m)." Q: How and...

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