From a3cfb0b01da791ae91bcdc414eac9f0f7b6077c3 Mon Sep 17 00:00:00 2001 From: Ben Harris Date: Thu, 22 Nov 2018 08:53:48 +0000 Subject: [PATCH] Use actual non-breaking spaces in index.html. Emacs displays them distinctly from normal spaces, and they're more readable than " ". --- index.xhtml | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/index.xhtml b/index.xhtml index abfe4f0..84986f7 100644 --- a/index.xhtml +++ b/index.xhtml @@ -18,12 +18,12 @@ header used from the Model B+ onwards. The board is smaller than either a HAT or a uHAT, so it should fit many cases.

ClunkPi is essentially a switchable current source. It - provides a current of 250 mA ±10% into a resistance of up - to 12 Î©. It is switched by GPIO line 17 from the Pi. It - is powered by the Pi's 5 V line, from which it needs - 250 mA.

+ provides a current of 250 mA ±10% into a resistance of up + to 12 Ω. It is switched by GPIO line 17 from the Pi. It + is powered by the Pi's 5 V line, from which it needs + 250 mA.

In theory, it should be possible to run ClunkPi off a higher - voltage to drive multiple clocks, up to the 50 V limit of + voltage to drive multiple clocks, up to the 50 V limit of the drive transistor.

Design files

I designed ClunkPi using @@ -33,7 +33,7 @@

Circuit description

The circuit is a simple current source controlled by a shunt voltage regulator. U1 and R2 control the base current in Q1 to - achieve 1.24 V across R1. D1 suppresses any voltage spike + achieve 1.24 V across R1. D1 suppresses any voltage spike caused by the inductance of the clock coil.

Use

Plug the board into a Raspberry Pi with the square solder pad -- 2.30.2