Ton Giesberts
About the article

Battery Saver Switch

Battery Saver Switch
There are circuits that consume only a little power or require power occasionally for short periods of time. An example of this last type is the ‘FM Remote Control Transmitter’. This type of circuit can easily be powered by a small lithium button cell. The CR2032 immediately comes to mind, since it is a popular battery used in many applications and is widely available.
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Gerber file

CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor GREEN and GOLD members can exclusively download these files for free as part of their membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service.

Elektor recommends its business partner Eurocircuits as the company of choice for its own prototypes and volume production in selected cases.

Component list
R1 = 10M?
R2 = 3M?3
R3 = 1M?*
R4 = 5M?6
R5 = 12k?
C1 = 4µF7 63V axial
T1 = BC547B
T2 = BC640
S1 = 6-mm ‘tactile switch’, e.g., MCDTS6-5R (Farnell # 312-1033)
BT1 = 3 V CR2032 with PCB mount holder (dia. 22.75 or 27.76 mm)*
* see text
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